<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Stone, Michael S.</style></author><author><style face="normal" font="default" size="100%">Devlin, Shawn</style></author><author><style face="normal" font="default" size="100%">Ian Hawes</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">McMurdo Dry Valley lake edge ‘moats’: The ecological intersection between terrestrial and aquatic polar desert habitat</style></title><secondary-title><style face="normal" font="default" size="100%">Antarctic Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">connectivity</style></keyword><keyword><style  face="normal" font="default" size="100%">ecosystem</style></keyword><keyword><style  face="normal" font="default" size="100%">ice</style></keyword><keyword><style  face="normal" font="default" size="100%">microbial mats</style></keyword><keyword><style  face="normal" font="default" size="100%">transition</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2024</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2024</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.cambridge.org/core/journals/antarctic-science/article/mcmurdo-dry-valley-lake-edge-moats-the-ecological-intersection-between-terrestrial-and-aquatic-polar-desert-habitats/31D94DD51E651603482A3AE6E8A52A57</style></url></web-urls></urls><pages><style face="normal" font="default" size="100%">1 - 17</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Aquatic ecosystems - lakes, ponds and streams - are hotspots of biodiversity in the cold and arid environment of Continental Antarctica. Environmental change is expected to increasingly alter Antarctic aquatic ecosystems and modify the physical characteristics and interactions within the habitats that they support. Here, we describe physical and biological features of the peripheral &amp;lsquo;moat&amp;rsquo; of a closed-basin Antarctic lake. These moats mediate connectivity amongst streams, lake and soils. We highlight the cyclical moat transition from a frozen winter state to an active open-water summer system, through refreeze as winter returns. Summer melting begins at the lakebed, initially creating an ice-constrained lens of liquid water in November, which swiftly progresses upwards, creating open water in December. Conversely, freezing progresses slowly from the water surface downwards, with water at 1 m bottom depth remaining liquid until May. Moats support productive, diverse benthic communities that are taxonomically distinct from those under the adjacent permanent lake ice. We show how ion ratios suggest that summer exchange occurs amongst moats, streams, soils and sub-ice lake water, perhaps facilitated by within-moat density-driven convection. Moats occupy a small but dynamic area of lake habitat, are disproportionately affected by recent lake-level rises and may thus be particularly vulnerable to hydrological change.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ngugi, David Kamanda</style></author><author><style face="normal" font="default" size="100%">Salcher, Michaela M.</style></author><author><style face="normal" font="default" size="100%">Andrei, Adrian-Stefan</style></author><author><style face="normal" font="default" size="100%">Ghai, Rohit</style></author><author><style face="normal" font="default" size="100%">Klotz, Franziska</style></author><author><style face="normal" font="default" size="100%">Chiriac, Maria-Cecilia</style></author><author><style face="normal" font="default" size="100%">Ionescu, Danny</style></author><author><style face="normal" font="default" size="100%">Büsing, Petra</style></author><author><style face="normal" font="default" size="100%">Grossart, Hans-Peter</style></author><author><style face="normal" font="default" size="100%">Xing, Peng</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Alymkulov, Salmor</style></author><author><style face="normal" font="default" size="100%">Pester, Michael</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Postglacial adaptations enabled colonization and quasi-clonal dispersal of ammonia-oxidizing archaea in modern European large lakes</style></title><secondary-title><style face="normal" font="default" size="100%">Science Advances</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2023</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.science.org/doi/10.1126/sciadv.adc9392</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">eadc9392</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Ammonia-oxidizing archaea (AOA) play a key role in the aquatic nitrogen cycle. Their genetic diversity is viewed as the outcome of evolutionary processes that shaped ancestral transition from terrestrial to marine habitats. However, current genome-wide insights into AOA evolution rarely consider brackish and freshwater representatives or provide their divergence timeline in lacustrine systems. An unbiased global assessment of lacustrine AOA diversity is critical for understanding their origins, dispersal mechanisms, and ecosystem roles. Here, we leveraged continental-scale metagenomics to document that AOA species diversity in freshwater systems is remarkably low compared to marine environments. We show that the uncultured freshwater AOA, &amp;ldquo;&lt;i&gt;Candidatus&lt;/i&gt; Nitrosopumilus limneticus,&amp;rdquo; is ubiquitous and genotypically static in various large European lakes where it evolved 13 million years ago. We find that extensive proteome remodeling was a key innovation for freshwater colonization of AOA. These findings reveal the genetic diversity and adaptive mechanisms of a keystone species that has survived clonally in lakes for millennia.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sediment oxygen consumption in Antarctic subglacial environments</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">07/2023</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.12366</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">68</style></volume><pages><style face="normal" font="default" size="100%">1557 - 1566</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Oxygen consumption in aquatic sediments is an indicator of overall biological activity of the ecosystem. As such, rates of sedimentary oxygen utilization are well documented for much of the open oceans and freshwater lakes. However, there are few direct measurements of sedimentary oxygen consumption from Antarctic subglacial aquatic sediments. We report the first microsensor oxygen profiles and derived sedimentary oxygen consumption rates from beneath the Ross Ice Shelf and a subglacial lake beneath the West Antarctic Ice Sheet. Rates of oxygen consumption in these two environments are relatively low, but comparable to those reported from ice-free polar oceans and oligotrophic Arctic lakes. Our study demonstrates the presence of oxygen within Antarctic subglacial aquatic sediments and its importance for oxygen-consuming microorganisms living in these ecosystems.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">7</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Sherwell, Shasten S.</style></author><author><style face="normal" font="default" size="100%">Kalra, Isha</style></author><author><style face="normal" font="default" size="100%">Li, Wei</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Microbiology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">07/2022</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://onlinelibrary.wiley.com/doi/10.1111/1462-2920.16113</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The McMurdo Dry Valleys (MDVs), Antarctica, represent a cold, desert ecosystem poised on the threshold of melting and freezing water. The MDVs have experienced dramatic signs of climatic change, most notably a warm austral summer in 2001&amp;ndash;2002 that caused widespread flooding, partial ice cover loss and lake level rise. To understand the impact of these climatic disturbances on lake microbial communities, we simulated lake level rise and ice-cover loss by transplanting dialysis-bagged communities from selected depths to other locations in the water column or to an open water perimeter moat. Bacteria and eukaryote communities residing in the surface waters (5 m) exhibited shifts in community composition when exposed to either disturbance, while microbial communities from below the surface were largely unaffected by the transplant. We also observed an accumulation of labile dissolved organic carbon in the transplanted surface communities. In addition, there were taxa-specific sensitivities: cryptophytes and Actinobacteria were highly sensitive particularly to the moat transplant, while chlorophytes and several bacterial taxa increased in relative abundance or were unaffected. Our results reveal that future climate-driven disturbances will likely undermine the stability and productivity of MDV lake phytoplankton and bacterial communities in the surface waters of this extreme environment.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Castendyk, Devin</style></author><author><style face="normal" font="default" size="100%">Hilary A. Dugan</style></author><author><style face="normal" font="default" size="100%">Gallagher, Hugh A.</style></author><author><style face="normal" font="default" size="100%">Pujara, Nimish</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Barotropic seiches in a perennially ice-covered lake, East Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography Letters</style></secondary-title><short-title><style face="normal" font="default" size="100%">Limnol Oceanogr Letters</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2022</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lol2.10226</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">7</style></volume><pages><style face="normal" font="default" size="100%">26 - 33</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Water movement in ice-covered lakes is known to be driven by wind, sediment heat flux, solar radiation, saline density flows, and advective stream discharge. In large ice-covered lakes, wind-induced oscillations have been found to play a major role in horizontal flows. Here, we report recurrent, wind-driven, barotropic seiches in a small lake with a thick (4 m) permanent ice-cover. Between 2010 and 2016, we recorded 10.5- to 13-min oscillations of the hydrostatic water level in Lake Hoare, McMurdo Dry Valleys, East Antarctica, using pressure transducers moored to the lake bottom and suspended from the ice cover. Theoretical calculations showed a barotropic seiche should have a period of 12.6 min. Barotropic seiches were most frequent during high wind events (&amp;gt; 5 m s&lt;sup&gt;-1&lt;/sup&gt;) in winter months (February&amp;ndash;November). The period increased during summer months (December&amp;ndash;January) when fast ice thinned and melted along the shoreline.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Guo, Bixi</style></author><author><style face="normal" font="default" size="100%">Li, Wei</style></author><author><style face="normal" font="default" size="100%">Santibáñez, Pamela</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Liu, Yongqin</style></author><author><style face="normal" font="default" size="100%">Liu, Keshao</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Organic matter distribution in the icy environments of Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Science of The Total Environment</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antarctica</style></keyword><keyword><style  face="normal" font="default" size="100%">bacteria</style></keyword><keyword><style  face="normal" font="default" size="100%">ice cores</style></keyword><keyword><style  face="normal" font="default" size="100%">katabatic wind</style></keyword><keyword><style  face="normal" font="default" size="100%">marine aerosol</style></keyword><keyword><style  face="normal" font="default" size="100%">organic matter</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2022</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/abs/pii/S0048969722037366</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">841</style></volume><pages><style face="normal" font="default" size="100%">156639</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Glaciers can accumulate and release organic matter affecting the structure and function of associated terrestrial and aquatic ecosystems. We analyzed 18 ice cores collected from six locations in Taylor Valley (McMurdo Dry Valleys), Antarctica to determine the spatial abundance and quality of organic matter, and the spatial distribution of bacterial density and community structure from the terminus of the Taylor Glacier to the coast (McMurdo Sound). Our results showed that dissolved and particulate organic carbon (DOC and POC) concentrations in the ice core samples increased from the Taylor Glacier to McMurdo Sound, a pattern also shown by bacterial cell density. Fluorescence Excitation Emission Matrices Spectroscopy (EEMs) and multivariate parallel factor (PARAFAC) modeling identified one humic-like (C1) and one protein-like (C2) component in ice cores whose fluorescent intensities all increased from the Polar Plateau to the coast. The fluorescence index showed that the bioavailability of dissolved organic matter (DOM) also decreased from the Polar Plateau to the coast. Partial least squares path modeling analysis revealed that bacterial abundance was the main positive biotic factor influencing both the quantity and quality of organic matter. Marine aerosol influenced the spatial distribution of DOC more than katabatic winds in the ice cores. Certain bacterial taxa showed significant correlations with DOC and POC concentrations. Collectively, our results show the tight connectivity among organic matter spatial distribution, bacterial abundance and meteorology in the McMurdo Dry Valley ecosystem.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Harms, Tamara K.</style></author><author><style face="normal" font="default" size="100%">Groffman, Peter M.</style></author><author><style face="normal" font="default" size="100%">Aluwihare, Lihini</style></author><author><style face="normal" font="default" size="100%">Craft, Christopher</style></author><author><style face="normal" font="default" size="100%">Wieder, William R</style></author><author><style face="normal" font="default" size="100%">Hobbie, S</style></author><author><style face="normal" font="default" size="100%">Baer, Sara G.</style></author><author><style face="normal" font="default" size="100%">J.M. Blair</style></author><author><style face="normal" font="default" size="100%">Frey, Serita D.</style></author><author><style face="normal" font="default" size="100%">Remucal, Christina K.</style></author><author><style face="normal" font="default" size="100%">Rudgers, Jennifer A.</style></author><author><style face="normal" font="default" size="100%">Collins, SL</style></author><author><style face="normal" font="default" size="100%">Kominoski, John S.</style></author><author><style face="normal" font="default" size="100%">Ball, Becky</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Patterns and trends of organic matter processing and transport: Insights from the US Long-term Ecological Research Network</style></title><secondary-title><style face="normal" font="default" size="100%">Climate Change Ecology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">coupled biogeochemical cycles</style></keyword><keyword><style  face="normal" font="default" size="100%">cross-site synthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">organic matter composition</style></keyword><keyword><style  face="normal" font="default" size="100%">organic matter storage</style></keyword><keyword><style  face="normal" font="default" size="100%">stabilization</style></keyword><keyword><style  face="normal" font="default" size="100%">transport</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2021</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S2666900521000253</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">2</style></volume><pages><style face="normal" font="default" size="100%">100025</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Organic matter (OM) dynamics determine how much carbon is stored in ecosystems, a service that modulates climate. We synthesized research from across the US Long-Term Ecological Research (LTER) Network to assemble a conceptual model of OM dynamics that is consistent with inter-disciplinary perspectives and emphasizes vulnerability of OM pools to disturbance. Guided by this conceptual model, we identified unanticipated patterns and long-term trends in processing and transport of OM emerging from terrestrial, freshwater, wetland, and marine ecosystems. Cross-ecosystem synthesis combined with a survey of researchers revealed several themes: 1) strong effects of climate change on OM dynamics, 2) surprising patterns in OM storage and dynamics resulting from coupling with nutrients, 3) characteristic and often complex legacies of land use and disturbance, 4) a significant role of OM transport that is often overlooked in terrestrial ecosystems, and 5) prospects for reducing uncertainty in forecasting OM dynamics by incorporating the chemical composition of OM. Cross-fertilization of perspectives and approaches across LTER sites and other research networks can stimulate the comprehensive understanding required to support large-scale characterizations of OM budgets and the role of ecosystems in regulating global climate.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Patriarche, Jeffrey D.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Winslow, Luke A.</style></author><author><style face="normal" font="default" size="100%">Myers, Krista F.</style></author><author><style face="normal" font="default" size="100%">Heather N. Buelow</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Year‐round and long‐term phytoplankton dynamics in Lake Bonney, a permanently ice‐covered Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research: Biogeosciences</style></secondary-title><short-title><style face="normal" font="default" size="100%">J Geophys Res Biogeosci</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">algae</style></keyword><keyword><style  face="normal" font="default" size="100%">Antarctic</style></keyword><keyword><style  face="normal" font="default" size="100%">fluorometry</style></keyword><keyword><style  face="normal" font="default" size="100%">ice</style></keyword><keyword><style  face="normal" font="default" size="100%">lakes</style></keyword><keyword><style  face="normal" font="default" size="100%">light</style></keyword><keyword><style  face="normal" font="default" size="100%">profiling</style></keyword><keyword><style  face="normal" font="default" size="100%">winter</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2021</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020JG005925</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">126</style></volume><pages><style face="normal" font="default" size="100%">e2020JG005925</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Lake Bonney (McMurdo Dry Valleys, east Antarctica) represents a year‐round refugium for life adapted to permanent extreme conditions. Despite intensive research since the 1960s, due to the logistical constraints posed by 4‐months of 24‐h darkness, knowledge of how the resident photosynthetic microorganisms respond to the polar winter is limited. In addition, the lake level has risen by more than 3 m since 2004: impacts of rapid lake level rise on phytoplankton community structure is also poorly understood. From 2004 to 2015 an in situ submersible spectrofluorometer (bbe FluoroProbe) was deployed in Lake Bonney during the austral summer to quantify the vertical structure of four functional algal groups (green algae, mixed algae, and cryptophytes, cyanobacteria). During the 2013&amp;ndash;2014 field season the Fluoroprobe was mounted on autonomous cable‐crawling profilers deployed in both the east and west lobes of Lake Bonney, obtaining the first daily phytoplankton profiles through the polar night. Our findings showed that phytoplankton communities were differentially impacted by physical and chemical factors over long‐term versus seasonal time scales. Following a summer of rapid lake level rise (2010&amp;ndash;2011), an increase in depth integrated chlorophyll a (chl‐a) occurred in Lake Bonney caused by stimulation of photoautotrophic green algae. Conversely, peaks in chl‐a during the polar night were associated with an increase in mixotrophic haptophytes and cryptophytes. Collectively our data reveal that phytoplankton groups possessing variable trophic abilities are differentially competitive during seasonal and long‐term time scales owing to periods of higher nutrients (photoautotrophs) versus light/energy limitation (mixotrophs).&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Li, Wei</style></author><author><style face="normal" font="default" size="100%">John E. Dore</style></author><author><style face="normal" font="default" size="100%">Steigmeyer, August J.</style></author><author><style face="normal" font="default" size="100%">Cho, Yong‐Joon</style></author><author><style face="normal" font="default" size="100%">Kim, Ok-Sun</style></author><author><style face="normal" font="default" size="100%">Liu, Yongqin</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">Skidmore, Mark L.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Methane production in the oxygenated water column of a perennially ice‐covered Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">01/2020</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.11257</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">65</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Aerobic methane production in aquatic ecosystems impacts the global atmospheric budget of methane, but the extent, mechanism, and taxa responsible for producing this greenhouse gas are not fully understood. Lake Bonney (LB), a perennially ice‐covered Antarctic lake, has cold hypersaline waters underlying an oxygenated freshwater layer. We present temporal methane concentration profiles in LB indicating methane production in the oxygenated (&amp;gt;&amp;thinsp;200% air saturation) water. Experiments amended with methylphosphonate (MPn) yielded methane generation, suggesting in situ methanogenesis via the carbon‐phosphorus (C‐P) lyase pathway. Enrichment cultures from the lake were used to isolate five bacterial strains capable of generating methane when supplied with MPn as the sole P source. Based on 16S rRNA gene sequencing, the isolates belong to the Proteobacteria (closely related to &lt;em&gt;Marinomonas&lt;/em&gt;, &lt;em&gt;Hoeflea&lt;/em&gt;, and &lt;em&gt;Marinobacte&lt;/em&gt;r genera) and Bacteroidetes (&lt;em&gt;Algoriphagus&lt;/em&gt; genus). 16S rRNA metagenomic sequencing confirms the presence of these taxa in LB. None of the isolated species were reported to be capable to produce methane. In addition, orthologs of the phosphoenolpyruvate mutase gene (&lt;em&gt;PepM&lt;/em&gt;) and methylphosphonate synthase (&lt;em&gt;MPnS&lt;/em&gt;), enzymes involved in phosphonate and MPn biosynthesis, were widely spread in the LB shotgun metagenomic libraries; genes related to C‐P lyase pathways (&lt;em&gt;phn&lt;/em&gt; gene clusters) were also abundant. 16S rRNA and &lt;em&gt;mcrA&lt;/em&gt; genes of anaerobic methanogens were absent in both 16S rRNA and metagenomics libraries. These data reveal that in situ aerobic biological methane production is likely a significant source of methane in LB.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lawrence, Jade</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">Winslow, Luke A.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Subglacial brine flow and wind-induced internal waves in Lake Bonney, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Antarctic Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Dry valleys</style></keyword><keyword><style  face="normal" font="default" size="100%">hypersalinity</style></keyword><keyword><style  face="normal" font="default" size="100%">lakes</style></keyword><keyword><style  face="normal" font="default" size="100%">proglacial</style></keyword><keyword><style  face="normal" font="default" size="100%">temperature</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2020</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102020000036</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Brine beneath Taylor Glacier has been proposed to enter the proglacial west lobe of Lake Bonney (WLB) as well as from Blood Falls, a surface discharge point at the Taylor Glacier terminus. The brine strongly influences the geochemistry of the water column of WLB. Year-round measurements from this study are the first to definitively identify brine intrusions from a subglacial entry point into WLB. Furthermore, we excluded input from Blood Falls by focusing on winter dynamics when the absence of an open water moat prevents surface brine entry. Due to the extremely high salinities below the chemocline in WLB, density stratification is dominated by salinity, and temperature can be used as a passive tracer. Cold brine intrusions enter WLB at the glacier face and intrude into the water column at the depth of neutral buoyancy, where they can be identified by anomalously cold temperatures at that depth. High-resolution measurements also reveal under-ice internal waves associated with katabatic wind events, a novel finding that challenges long-held assumptions about the stability of the WLB water column.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Cook, Greg</style></author><author><style face="normal" font="default" size="100%">Teufel, Amber</style></author><author><style face="normal" font="default" size="100%">Kalra, Isha</style></author><author><style face="normal" font="default" size="100%">Li, Wei</style></author><author><style face="normal" font="default" size="100%">Wang, Xin</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Antarctic psychrophiles &lt;i&gt;Chlamydomonas&lt;/i&gt; spp. UWO241 and ICE-MDV exhibit differential restructuring of photosystem I in response to iron</style></title><secondary-title><style face="normal" font="default" size="100%">Photosynthesis Research</style></secondary-title><short-title><style face="normal" font="default" size="100%">Photosynth Res</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antarctica</style></keyword><keyword><style  face="normal" font="default" size="100%">Cyclic electron flow</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron</style></keyword><keyword><style  face="normal" font="default" size="100%">Photosystem I</style></keyword><keyword><style  face="normal" font="default" size="100%">Psychrophile</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://link.springer.com/article/10.1007/s11120-019-00621-0</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;em&gt;Chlamydomonas &lt;/em&gt;sp. UWO241 is a psychrophilic alga isolated from the deep photic zone of a perennially ice-covered Antarctic lake (east lobe Lake Bonney, ELB). Past studies have shown that &lt;em&gt;C&lt;/em&gt;. sp. UWO241 exhibits constitutive downregulation of photosystem I (PSI) and high rates of PSI-associated cyclic electron flow (CEF). Iron levels in ELB are in the nanomolar range leading us to hypothesize that the unusual PSI phenotype of &lt;em&gt;C&lt;/em&gt;. sp. UWO241 could be a response to chronic Fe-deficiency. We studied the impact of Fe availability in &lt;em&gt;C&lt;/em&gt;. sp. UWO241, a mesophile, C. &lt;em&gt;reinhardtii&lt;/em&gt; SAG11-32c, as well as a psychrophile isolated from the shallow photic zone of ELB, &lt;em&gt;Chlamydomonas&lt;/em&gt; sp. ICE-MDV. Under Fe-deficiency, PsaA abundance and levels of photooxidizable P700 (ΔA&lt;sub&gt;820&lt;/sub&gt;/A&lt;sub&gt;820&lt;/sub&gt;) were reduced in both psychrophiles relative to the mesophile. Upon increasing Fe, &lt;em&gt;C&lt;/em&gt;. sp. ICE-MDV and C. &lt;em&gt;reinhardtii&lt;/em&gt; exhibited restoration of PSI function, while &lt;em&gt;C&lt;/em&gt;. sp. UWO241 exhibited only moderate changes in PSI activity and lacked almost all LHCI proteins. Relative to Fe-excess conditions (200 μM Fe&lt;sup&gt;2+&lt;/sup&gt;), &lt;em&gt;C&lt;/em&gt;. sp. UWO241 grown in 18 μM Fe&lt;sup&gt;2+&lt;/sup&gt; exhibited downregulation of light harvesting and photosystem core proteins, as well as upregulation of a bestrophin-like anion channel protein and two CEF-associated proteins (NdsS, PGL1). Key enzymes of starch synthesis and shikimate biosynthesis were also upregulated. We conclude that in response to variable Fe availability, the psychrophile &lt;em&gt;C&lt;/em&gt;. sp. UWO241 exhibits physiological plasticity which includes restructuring of the photo-chemical apparatus, increased PSI-associated CEF, and shifts in downstream carbon metabolism toward storage carbon and secondary stress metabolites.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santibáñez, Pamela</style></author><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">D’Andrilli, Juliana</style></author><author><style face="normal" font="default" size="100%">Amy Chiuchiolo</style></author><author><style face="normal" font="default" size="100%">Hand, Kevin P.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Differential incorporation of bacteria, organic matter, and inorganic ions into lake ice during ice formation</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research: Biogeosciences</style></secondary-title><short-title><style face="normal" font="default" size="100%">J. Geophys. Res. Biogeosci.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JG004825</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">124</style></volume><pages><style face="normal" font="default" size="100%">585 - 600</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-family: &amp;quot;Times New Roman&amp;quot;; font-size: 12pt;&quot;&gt;The segregation of bacteria, inorganic solutes, and total organic carbon between liquid water and ice during winter ice formation on lakes can significantly influence the concentration and survival of microorganisms in icy systems, and their roles in biogeochemical processes. Our study quantifies the distributions of bacteria and solutes between liquid and solid water phases during progressive freezing. We simulated lake ice formation in mesocosm experiments using water from perennially (Antarctica) and seasonally (Alaska and Montana, USA) ice covered lakes. We then computed concentration factors and effective segregation coefficients, which are parameters describing the incorporation of bacteria and solutes into ice. Experimental results revealed that, contrary to major ions, bacteria were readily incorporated into ice and did not concentrate in the liquid phase. The organic matter incorporated into the ice was labile, amino acid-like material, differing from the humic-like compounds that remained in the liquid phase. Results from a control mesocosm experiment (dead bacterial cells) indicated that viability of bacterial cells did not influence the incorporation of free bacterial cells into ice, but did have a role in the formation and incorporation of bacterial aggregates. Together, these findings demonstrate that bacteria, unlike other solutes, were preferentially incorporated into lake-ice during our freezing experiments, a process controlled mainly by the initial solute concentration of the liquid water source, regardless of cell viability.&lt;/span&gt;&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Inorganic carbon fixation in ice-covered lakes of the McMurdo Dry Valleys</style></title><secondary-title><style face="normal" font="default" size="100%">Antarctic Science</style></secondary-title><short-title><style face="normal" font="default" size="100%">Antarctic Science</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ammonia oxidation</style></keyword><keyword><style  face="normal" font="default" size="100%">carbon budget</style></keyword><keyword><style  face="normal" font="default" size="100%">chemoautotrophy</style></keyword><keyword><style  face="normal" font="default" size="100%">chemolithoautotrophy</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.cambridge.org/core/journals/antarctic-science/article/inorganic-carbon-fixation-in-icecovered-lakes-of-the-mcmurdo-dry-valleys/4B5CA9E91C85B307EFDA69F8D7B5BFD9</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">72</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Inorganic carbon fixation, usually mediated by photosynthetic microorganisms, is considered to form the base of the food chain in aquatic ecosystems. In high-latitude lakes, lack of sunlight owing to seasonal solar radiation limits the activity of photosynthetic plankton during the polar winter, causing respiration-driven demand for carbon to exceed supply. Here, we show that inorganic carbon fixation in the dark, driven by organisms that gain energy from chemical reactions rather than sunlight (chemolithoautotrophs), provides a significant influx of fixed carbon to two permanently ice-covered lakes (Fryxell and East Bonney). Fryxell, which has higher biomass per unit volume of water, had higher rates of inorganic dark carbon fixation by chemolithoautotrophs than East Bonney (trophogenic zone average 1.0 &amp;micro;g C l&lt;sup&gt;&amp;minus;1&lt;/sup&gt; d&lt;sup&gt;&amp;minus;1&amp;nbsp;&lt;/sup&gt;vs 0.08 &amp;micro;g C l&lt;sup&gt;&amp;minus;1&lt;/sup&gt; d&lt;sup&gt;&amp;minus;1&lt;/sup&gt;, respectively). This contribution from dark carbon fixation was partly due to the activity of ammonia oxidizers, which are present in both lakes. Despite the potential importance of new carbon input by chemolithoautotrophic activity, both lakes remain net heterotrophic, with respiratory demand for carbon exceeding supply. Dark carbon fixation increased the ratio of new carbon supply to respiratory demand from 0.16 to 0.47 in Fryxell, and from 0.14 to 0.22 in East Bonney.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Prediction of ice-free conditions for a perennially ice-covered Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research: Earth Surface</style></secondary-title><short-title><style face="normal" font="default" size="100%">J. Geophys. Res. Earth Surf.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JF004756</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">124</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-family: &amp;quot;Times New Roman&amp;quot;; font-size: 12pt;&quot;&gt;Although perennially ice-covered Antarctic lakes have experienced variable ice thicknesses over the past several decades, future ice thickness trends and associated aquatic biological responses under projected global warming remain unknown. Heat stored in the water column in chemically stratified Antarctic lakes that have mid-depth temperature maxima, can significantly influence the ice thickness trends via upward heat flux to the ice/water interface. We modeled ice thickness of the west of lobe of Lake Bonney, Antarctica based on possible future climate scenarios utilizing a 1D thermodynamic model that accounts for surface radiative fluxes as well as the heat flux associated with the temperature evolution of the water column. Model results predict that the ice cover of Lake Bonney will shift from perennial to seasonal within one to four decades, a change that will drastically influence ecosystem processes within the lake.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dornelas, Maria</style></author><author><style face="normal" font="default" size="100%">Antão, Laura H.</style></author><author><style face="normal" font="default" size="100%">Moyes, Faye</style></author><author><style face="normal" font="default" size="100%">Bates, Amanda E.</style></author><author><style face="normal" font="default" size="100%">Magurran, Anne E.</style></author><author><style face="normal" font="default" size="100%">Adam, Dušan</style></author><author><style face="normal" font="default" size="100%">Akhmetzhanova, Asem A.</style></author><author><style face="normal" font="default" size="100%">Appeltans, Ward</style></author><author><style face="normal" font="default" size="100%">Arcos, José Manuel</style></author><author><style face="normal" font="default" size="100%">Arnold, Haley</style></author><author><style face="normal" font="default" size="100%">Ayyappan, Narayanan</style></author><author><style face="normal" font="default" size="100%">Badihi, Gal</style></author><author><style face="normal" font="default" size="100%">Baird, Andrew H.</style></author><author><style face="normal" font="default" size="100%">Barbosa, Miguel</style></author><author><style face="normal" font="default" size="100%">Barreto, Tiago Egydio</style></author><author><style face="normal" font="default" size="100%">Bässler, Claus</style></author><author><style face="normal" font="default" size="100%">Bellgrove, Alecia</style></author><author><style face="normal" font="default" size="100%">Belmaker, Jonathan</style></author><author><style face="normal" font="default" size="100%">Benedetti-Cecchi, Lisandro</style></author><author><style face="normal" font="default" size="100%">Bett, Brian J.</style></author><author><style face="normal" font="default" size="100%">Bjorkman, Anne D.</style></author><author><style face="normal" font="default" size="100%">Błażewicz, Magdalena</style></author><author><style face="normal" font="default" size="100%">Blowes, Shane A.</style></author><author><style face="normal" font="default" size="100%">Bloch, Christopher P.</style></author><author><style face="normal" font="default" size="100%">Bonebrake, Timothy C.</style></author><author><style face="normal" font="default" size="100%">Boyd, Susan</style></author><author><style face="normal" font="default" size="100%">Bradford, Matt</style></author><author><style face="normal" font="default" size="100%">Brooks, Andrew J.</style></author><author><style face="normal" font="default" size="100%">Brown, James H.</style></author><author><style face="normal" font="default" size="100%">Bruelheide, Helge</style></author><author><style face="normal" font="default" size="100%">Budy, Phaedra</style></author><author><style face="normal" font="default" size="100%">Carvalho, Fernando</style></author><author><style face="normal" font="default" size="100%">Castañeda-Moya, Edward</style></author><author><style face="normal" font="default" size="100%">Chen, Chaolun Allen</style></author><author><style face="normal" font="default" size="100%">Chamblee, John F.</style></author><author><style face="normal" font="default" size="100%">Chase, Tory J.</style></author><author><style face="normal" font="default" size="100%">Siegwart Collier, Laura</style></author><author><style face="normal" font="default" size="100%">Collinge, Sharon K.</style></author><author><style face="normal" font="default" size="100%">Condit, Richard</style></author><author><style face="normal" font="default" size="100%">Cooper, Elisabeth J.</style></author><author><style face="normal" font="default" size="100%">Cornelissen, J. Hans C.</style></author><author><style face="normal" font="default" size="100%">Cotano, Unai</style></author><author><style face="normal" font="default" size="100%">Kyle Crow, Shannan</style></author><author><style face="normal" font="default" size="100%">Damasceno, Gabriella</style></author><author><style face="normal" font="default" size="100%">Davies, Claire H.</style></author><author><style face="normal" font="default" size="100%">Davis, Robert A.</style></author><author><style face="normal" font="default" size="100%">Day, Frank P.</style></author><author><style face="normal" font="default" size="100%">Degraer, Steven</style></author><author><style face="normal" font="default" size="100%">Doherty, Tim S.</style></author><author><style face="normal" font="default" size="100%">Dunn, Timothy E.</style></author><author><style face="normal" font="default" size="100%">Durigan, Giselda</style></author><author><style face="normal" font="default" size="100%">Duffy, J. Emmett</style></author><author><style face="normal" font="default" size="100%">Edelist, Dor</style></author><author><style face="normal" font="default" size="100%">Edgar, Graham J.</style></author><author><style face="normal" font="default" size="100%">Elahi, Robin</style></author><author><style face="normal" font="default" size="100%">Elmendorf, Sarah C.</style></author><author><style face="normal" font="default" size="100%">Enemar, Anders</style></author><author><style face="normal" font="default" size="100%">Ernest, S. K. Morgan</style></author><author><style face="normal" font="default" size="100%">Escribano, Rubén</style></author><author><style face="normal" font="default" size="100%">Estiarte, Marc</style></author><author><style face="normal" font="default" size="100%">Evans, Brian S.</style></author><author><style face="normal" font="default" size="100%">Fan, Tung-Yung</style></author><author><style face="normal" font="default" size="100%">Turini Farah, Fabiano</style></author><author><style face="normal" font="default" size="100%">Loureiro Fernandes, Luiz</style></author><author><style face="normal" font="default" size="100%">Farneda, Fábio Z.</style></author><author><style face="normal" font="default" size="100%">Fidelis, Alessandra</style></author><author><style face="normal" font="default" size="100%">Fitt, Robert</style></author><author><style face="normal" font="default" size="100%">Fosaa, Anna Maria</style></author><author><style face="normal" font="default" size="100%">Daher Correa Franco, Geraldo Antonio</style></author><author><style face="normal" font="default" size="100%">Frank, Grace E.</style></author><author><style face="normal" font="default" size="100%">Fraser, William R.</style></author><author><style face="normal" font="default" size="100%">García, Hernando</style></author><author><style face="normal" font="default" size="100%">Cazzolla Gatti, Roberto</style></author><author><style face="normal" font="default" size="100%">Givan, Or</style></author><author><style face="normal" font="default" size="100%">Gorgone-Barbosa, Elizabeth</style></author><author><style face="normal" font="default" size="100%">Gould, William A.</style></author><author><style face="normal" font="default" size="100%">Gries, Corinna</style></author><author><style face="normal" font="default" size="100%">Grossman, Gary D.</style></author><author><style face="normal" font="default" size="100%">Gutierréz, Julio R.</style></author><author><style face="normal" font="default" size="100%">Hale, Stephen</style></author><author><style face="normal" font="default" size="100%">Harmon, Mark E.</style></author><author><style face="normal" font="default" size="100%">Harte, John</style></author><author><style face="normal" font="default" size="100%">Haskins, Gary</style></author><author><style face="normal" font="default" size="100%">Henshaw, Donald L.</style></author><author><style face="normal" font="default" size="100%">Hermanutz, Luise</style></author><author><style face="normal" font="default" size="100%">Hidalgo, Pamela</style></author><author><style face="normal" font="default" size="100%">Higuchi, Pedro</style></author><author><style face="normal" font="default" size="100%">Hoey, Andrew</style></author><author><style face="normal" font="default" size="100%">Van Hoey, Gert</style></author><author><style face="normal" font="default" size="100%">Hofgaard, Annika</style></author><author><style face="normal" font="default" size="100%">Holeck, Kristen</style></author><author><style face="normal" font="default" size="100%">Hollister, Robert D.</style></author><author><style face="normal" font="default" size="100%">Holmes, Richard</style></author><author><style face="normal" font="default" size="100%">Hoogenboom, Mia</style></author><author><style face="normal" font="default" size="100%">Hsieh, Chih-hao</style></author><author><style face="normal" font="default" size="100%">Hubbell, Stephen P.</style></author><author><style face="normal" font="default" size="100%">Huettmann, Falk</style></author><author><style face="normal" font="default" size="100%">Huffard, Christine L.</style></author><author><style face="normal" font="default" size="100%">Hurlbert, Allen H.</style></author><author><style face="normal" font="default" size="100%">Macedo Ivanauskas, Natália</style></author><author><style face="normal" font="default" size="100%">Janík, David</style></author><author><style face="normal" font="default" size="100%">Jandt, Ute</style></author><author><style face="normal" font="default" size="100%">Jażdżewska, Anna</style></author><author><style face="normal" font="default" size="100%">Johannessen, Tore</style></author><author><style face="normal" font="default" size="100%">Johnstone, Jill</style></author><author><style face="normal" font="default" size="100%">Jones, Julia</style></author><author><style face="normal" font="default" size="100%">Jones, Faith A. M.</style></author><author><style face="normal" font="default" size="100%">Kang, Jungwon</style></author><author><style face="normal" font="default" size="100%">Kartawijaya, Tasrif</style></author><author><style face="normal" font="default" size="100%">Keeley, Erin C.</style></author><author><style face="normal" font="default" size="100%">Kelt, Douglas A.</style></author><author><style face="normal" font="default" size="100%">Kinnear, Rebecca</style></author><author><style face="normal" font="default" size="100%">Klanderud, Kari</style></author><author><style face="normal" font="default" size="100%">Knutsen, Halvor</style></author><author><style face="normal" font="default" size="100%">Koenig, Christopher C.</style></author><author><style face="normal" font="default" size="100%">Kortz, Alessandra R.</style></author><author><style face="normal" font="default" size="100%">Král, Kamil</style></author><author><style face="normal" font="default" size="100%">Kuhnz, Linda A.</style></author><author><style face="normal" font="default" size="100%">Kuo, Chao-Yang</style></author><author><style face="normal" font="default" size="100%">Kushner, David J.</style></author><author><style face="normal" font="default" size="100%">Laguionie-Marchais, Claire</style></author><author><style face="normal" font="default" size="100%">Lancaster, Lesley T.</style></author><author><style face="normal" font="default" size="100%">Min Lee, Cheol</style></author><author><style face="normal" font="default" size="100%">Lefcheck, Jonathan S.</style></author><author><style face="normal" font="default" size="100%">Lévesque, Esther</style></author><author><style face="normal" font="default" size="100%">Lightfoot, David</style></author><author><style face="normal" font="default" size="100%">Lloret, Francisco</style></author><author><style face="normal" font="default" size="100%">Lloyd, John D.</style></author><author><style face="normal" font="default" size="100%">López-Baucells, Adrià</style></author><author><style face="normal" font="default" size="100%">Louzao, Maite</style></author><author><style face="normal" font="default" size="100%">Madin, Joshua S.</style></author><author><style face="normal" font="default" size="100%">Magnússon, Borgþór</style></author><author><style face="normal" font="default" size="100%">Malamud, Shahar</style></author><author><style face="normal" font="default" size="100%">Matthews, Iain</style></author><author><style face="normal" font="default" size="100%">McFarland, Kent P.</style></author><author><style face="normal" font="default" size="100%">McGill, Brian</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">McLarney, William O.</style></author><author><style face="normal" font="default" size="100%">Meador, Jason</style></author><author><style face="normal" font="default" size="100%">Meserve, Peter L.</style></author><author><style face="normal" font="default" size="100%">Metcalfe, Daniel J.</style></author><author><style face="normal" font="default" size="100%">Meyer, Christoph F. J.</style></author><author><style face="normal" font="default" size="100%">Michelsen, Anders</style></author><author><style face="normal" font="default" size="100%">Milchakova, Nataliya</style></author><author><style face="normal" font="default" size="100%">Moens, Tom</style></author><author><style face="normal" font="default" size="100%">Moland, Even</style></author><author><style face="normal" font="default" size="100%">Moore, Jon</style></author><author><style face="normal" font="default" size="100%">Mathias Moreira, Carolina</style></author><author><style face="normal" font="default" size="100%">Müller, Jörg</style></author><author><style face="normal" font="default" size="100%">Murphy, Grace</style></author><author><style face="normal" font="default" size="100%">Myers-Smith, Isla H.</style></author><author><style face="normal" font="default" size="100%">Myster, Randall W.</style></author><author><style face="normal" font="default" size="100%">Naumov, Andrew</style></author><author><style face="normal" font="default" size="100%">Neat, Francis</style></author><author><style face="normal" font="default" size="100%">Nelson, James A.</style></author><author><style face="normal" font="default" size="100%">Paul Nelson, Michael</style></author><author><style face="normal" font="default" size="100%">Newton, Stephen F.</style></author><author><style face="normal" font="default" size="100%">Norden, Natalia</style></author><author><style face="normal" font="default" size="100%">Oliver, Jeffrey C.</style></author><author><style face="normal" font="default" size="100%">Olsen, Esben M.</style></author><author><style face="normal" font="default" size="100%">Onipchenko, Vladimir G.</style></author><author><style face="normal" font="default" size="100%">Pabis, Krzysztof</style></author><author><style face="normal" font="default" size="100%">Pabst, Robert J.</style></author><author><style face="normal" font="default" size="100%">Paquette, Alain</style></author><author><style face="normal" font="default" size="100%">Pardede, Sinta</style></author><author><style face="normal" font="default" size="100%">Paterson, David M.</style></author><author><style face="normal" font="default" size="100%">Pélissier, Raphaël</style></author><author><style face="normal" font="default" size="100%">Peñuelas, Josep</style></author><author><style face="normal" font="default" size="100%">Pérez-Matus, Alejandro</style></author><author><style face="normal" font="default" size="100%">Pizarro, Oscar</style></author><author><style face="normal" font="default" size="100%">Pomati, Francesco</style></author><author><style face="normal" font="default" size="100%">Post, Eric</style></author><author><style face="normal" font="default" size="100%">Prins, Herbert H. T.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Provoost, Pieter</style></author><author><style face="normal" font="default" size="100%">Prudic, Kathleen L.</style></author><author><style face="normal" font="default" size="100%">Pulliainen, Erkki</style></author><author><style face="normal" font="default" size="100%">Ramesh, B. R.</style></author><author><style face="normal" font="default" size="100%">Mendivil Ramos, Olivia</style></author><author><style face="normal" font="default" size="100%">Rassweiler, Andrew</style></author><author><style face="normal" font="default" size="100%">Rebelo, Jose Eduardo</style></author><author><style face="normal" font="default" size="100%">Reed, Daniel C.</style></author><author><style face="normal" font="default" size="100%">Reich, Peter B.</style></author><author><style face="normal" font="default" size="100%">Remillard, Suzanne M.</style></author><author><style face="normal" font="default" size="100%">Richardson, Anthony J.</style></author><author><style face="normal" font="default" size="100%">Richardson, J. Paul</style></author><author><style face="normal" font="default" size="100%">van Rijn, Itai</style></author><author><style face="normal" font="default" size="100%">Rocha, Ricardo</style></author><author><style face="normal" font="default" size="100%">Rivera-Monroy, Victor H.</style></author><author><style face="normal" font="default" size="100%">Rixen, Christian</style></author><author><style face="normal" font="default" size="100%">Robinson, Kevin P.</style></author><author><style face="normal" font="default" size="100%">Ribeiro Rodrigues, Ricardo</style></author><author><style face="normal" font="default" size="100%">de Cerqueira Rossa-Feres, Denise</style></author><author><style face="normal" font="default" size="100%">Rudstam, Lars</style></author><author><style face="normal" font="default" size="100%">Ruhl, Henry</style></author><author><style face="normal" font="default" size="100%">Ruz, Catalina S.</style></author><author><style face="normal" font="default" size="100%">Sampaio, Erica M.</style></author><author><style face="normal" font="default" size="100%">Rybicki, Nancy</style></author><author><style face="normal" font="default" size="100%">Rypel, Andrew</style></author><author><style face="normal" font="default" size="100%">Sal, Sofia</style></author><author><style face="normal" font="default" size="100%">Salgado, Beatriz</style></author><author><style face="normal" font="default" size="100%">Santos, Flavio A. M.</style></author><author><style face="normal" font="default" size="100%">Savassi-Coutinho, Ana Paula</style></author><author><style face="normal" font="default" size="100%">Scanga, Sara</style></author><author><style face="normal" font="default" size="100%">Schmidt, Jochen</style></author><author><style face="normal" font="default" size="100%">Schooley, Robert</style></author><author><style face="normal" font="default" size="100%">Setiawan, Fakhrizal</style></author><author><style face="normal" font="default" size="100%">Shao, Kwang-Tsao</style></author><author><style face="normal" font="default" size="100%">Shaver, Gaius R.</style></author><author><style face="normal" font="default" size="100%">Sherman, Sally</style></author><author><style face="normal" font="default" size="100%">Sherry, Thomas W.</style></author><author><style face="normal" font="default" size="100%">Siciński, Jacek</style></author><author><style face="normal" font="default" size="100%">Sievers, Caya</style></author><author><style face="normal" font="default" size="100%">da Silva, Ana Carolina</style></author><author><style face="normal" font="default" size="100%">Rodrigues da Silva, Fernando</style></author><author><style face="normal" font="default" size="100%">Silveira, Fabio L.</style></author><author><style face="normal" font="default" size="100%">Slingsby, Jasper</style></author><author><style face="normal" font="default" size="100%">Smart, Tracey</style></author><author><style face="normal" font="default" size="100%">Snell, Sara J.</style></author><author><style face="normal" font="default" size="100%">Soudzilovskaia, Nadejda A.</style></author><author><style face="normal" font="default" size="100%">Souza, Gabriel B. G.</style></author><author><style face="normal" font="default" size="100%">Maluf Souza, Flaviana</style></author><author><style face="normal" font="default" size="100%">Castro Souza, Vinícius</style></author><author><style face="normal" font="default" size="100%">Stallings, Christopher D.</style></author><author><style face="normal" font="default" size="100%">Stanforth, Rowan</style></author><author><style face="normal" font="default" size="100%">Stanley, Emily H.</style></author><author><style face="normal" font="default" size="100%">Mauro Sterza, José</style></author><author><style face="normal" font="default" size="100%">Stevens, Maarten</style></author><author><style face="normal" font="default" size="100%">Stuart-Smith, Rick</style></author><author><style face="normal" font="default" size="100%">Rondon Suarez, Yzel</style></author><author><style face="normal" font="default" size="100%">Supp, Sarah</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">BioTIME: A database of biodiversity time series for the Anthropocene</style></title><secondary-title><style face="normal" font="default" size="100%">Global Ecology and Biogeography</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">biodiversity</style></keyword><keyword><style  face="normal" font="default" size="100%">global</style></keyword><keyword><style  face="normal" font="default" size="100%">spatial</style></keyword><keyword><style  face="normal" font="default" size="100%">species richness</style></keyword><keyword><style  face="normal" font="default" size="100%">temporal</style></keyword><keyword><style  face="normal" font="default" size="100%">turnover</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">07/2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://onlinelibrary.wiley.com/doi/abs/10.1111/geb.12729</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">760-786</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;strong&gt;Motivation: &lt;/strong&gt;The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analysis of temporal patterns of biodiversity in the Anthropocene.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Main types of variables included: &lt;/strong&gt;The database contains 8,777,413 species abundance records, from assemblages consistently sampled for a minimum of 2 years, which need not necessarily be consecutive. In addition, the database contains metadata relating to sampling methodology and contextual information about each record.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Spatial location and grain:&lt;/strong&gt; BioTIME is a global database of 547,161 unique sampling locations spanning the marine, freshwater and terrestrial realms. Grain size varies across datasets from 0.0000000158 km2 (158 cm2) to 100 km2 (1,000,000,000,000 cm2). Time period and grain BioTIME records span from 1874 to 2016. The minimal temporal grain across all datasets in BioTIME is a year.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Major taxa and level of measurement:&amp;nbsp;&lt;/strong&gt;BioTIME includes data from 44,440 species across the plant and animal kingdoms, ranging from plants, plankton and terrestrial invertebrates to small and large vertebrates.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Software format:&lt;/strong&gt; .csv and .SQL.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">7</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Spigel, Robert H.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">Stone, William C.</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The physical limnology of a permanently ice-covered and chemically stratified Antarctic lake using high resolution spatial data from an autonomous underwater vehicle</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title><short-title><style face="normal" font="default" size="100%">Limnol. Oceanogr.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">05/2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/wol1/doi/10.1002/lno.10768/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">63</style></volume><pages><style face="normal" font="default" size="100%">1234 - 1252</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvSTONE; color: rgb(35, 31, 32);&quot;&gt;We used an Environmentally Non-Disturbing Under-ice Robotic ANtarctic Explorer to make measurements of conductivity and temperature in Lake Bonney, a chemically stratified, permanently ice-covered Antarctic lake that abuts Taylor Glacier, an outlet glacier from the Polar Plateau. The lake is divided into two lobes &amp;ndash; East Lobe Bonney (ELB) and West Lobe Bonney (WLB), each with unique temperature and salinity profiles. Most of our data were collected in November 2009 from WLB to examine the influence of the Taylor Glacier on the structure of the water column. Temperatures adjacent to the glacier face between 20 m and 22 m were 3&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvP7DA6; color: rgb(35, 31, 32);&quot;&gt;8&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvSTONE; color: rgb(35, 31, 32);&quot;&gt;C colder than in the rest of WLB, due to latent heat transfer associated with melting of the submerged glacier face and inflow of cold brines that originate beneath the glacier. Melting of the glacier face into the salinity gradient below the chemocline generates a series of nearly horizontal intrusions into WLB that were previously documented in profiles measured with 3 cm vertical resolution in 1990&amp;ndash;1991. WLB and ELB are connected by a narrow channel through which water can be exchanged over a shallow sill that controls the position of the chemocline in WLB. A complex exchange flow appears to exist through the narrows, driven by horizontal density gradients and melting at the glacier face. Superimposed on the exchange is a net west- to-east flow generated by the higher volume of meltwater inflows to WLB. Both of these processes can be expected to be enhanced in the future as more meltwater is produced.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Eric R. Sokol</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Martijn L. Vandegehuchte</style></author><author><style face="normal" font="default" size="100%">Ross A. Virginia</style></author><author><style face="normal" font="default" size="100%">Diana H. Wall</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Nature Ecology &amp; Evolution</style></secondary-title><short-title><style face="normal" font="default" size="100%">Nat Ecol Evol</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">09/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.nature.com/articles/s41559-017-0253-0</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">1</style></volume><pages><style face="normal" font="default" size="100%">1334-1338</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">9</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ferrera, Isabel</style></author><author><style face="normal" font="default" size="100%">Sarmento, Hugo</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Amy Chiuchiolo</style></author><author><style face="normal" font="default" size="100%">José M. González</style></author><author><style face="normal" font="default" size="100%">Grossart, Hans-Peter</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Diversity and Distribution of Freshwater Aerobic Anoxygenic Phototrophic Bacteria across a Wide Latitudinal Gradient</style></title><secondary-title><style face="normal" font="default" size="100%">Frontiers in Microbiology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Front. Microbiol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://journal.frontiersin.org/article/10.3389/fmicb.2017.00175/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">8</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Aerobic anoxygenic phototrophs (AAPs) have been shown to exist in numerous marine and brackish environments where they are hypothesized to play important ecological roles. Despite their potential significance, the study of freshwater AAPs is in its infancy and limited to local investigations. Here, we explore the occurrence, diversity and distribution of AAPs in lakes covering a wide latitudinal gradient: Mongolian and German lakes located in temperate regions of Eurasia, tropical Great East African lakes, and polar permanently ice-covered Antarctic lakes. Our results show a widespread distribution of AAPs in lakes with contrasting environmental conditions and confirm that this group is composed of different members of the Alpha- and Betaproteobacteria. While latitude does not seem to strongly influence AAP abundance, clear patterns of community structure and composition along geographic regions were observed as indicated by a strong macro-geographical signal in the taxonomical composition of AAPs. Overall, our results suggest that the distribution patterns of freshwater AAPs are likely driven by a combination of small-scale environmental conditions (specific of each lake and region) and large-scale geographic factors (climatic regions across a latitudinal gradient).&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rojas-Jimenez, Keilor</style></author><author><style face="normal" font="default" size="100%">Wurzbacher, Christian</style></author><author><style face="normal" font="default" size="100%">Bourne, Elizabeth Charlotte</style></author><author><style face="normal" font="default" size="100%">Amy Chiuchiolo</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Grossart, Hans-Peter</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Early diverging lineages within Cryptomycota and Chytridiomycota dominate the fungal communities in ice-covered lakes of the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Scientific Reports</style></secondary-title><short-title><style face="normal" font="default" size="100%">Sci Rep</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.nature.com/articles/s41598-017-15598-w</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">7</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Antarctic ice-covered lakes are exceptional sites for studying the ecology of aquatic fungi under conditions of minimal human disturbance. In this study, we explored the diversity and community composition of fungi in five permanently covered lake basins located in the Taylor and Miers Valleys of Antarctica. Based on analysis of the 18S rRNA sequences, we showed that fungal taxa represented between 0.93% and 60.32% of the eukaryotic sequences. Cryptomycota and Chytridiomycota dominated the fungal communities in all lakes; however, members of Ascomycota, Basidiomycota, Zygomycota, and Blastocladiomycota were also present. Of the 1313 fungal OTUs identified, the two most abundant, belonging to LKM11 and Chytridiaceae, comprised 74% of the sequences. Significant differences in the community structure were determined among lakes, water depths, habitat features (i.e., brackish vs. freshwaters), and nucleic acids (DNA vs. RNA), suggesting niche differentiation. Network analysis suggested the existence of strong relationships among specific fungal phylotypes as well as between fungi and other eukaryotes. This study sheds light on the biology and ecology of basal fungi in aquatic systems. To our knowledge, this is the first report showing the predominance of early diverging lineages of fungi in pristine limnetic ecosystems, particularly of the enigmatic phylum Cryptomycota.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue><section><style face="normal" font="default" size="100%">15348</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Patriarche, Jeffrey D.</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Long-term and over winter phytoplankton community dynamics in Lake Bonney, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Department of Land Resources and Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://scholarworks.montana.edu/xmlui/handle/1/12803</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Bozeman, MT</style></pub-location><volume><style face="normal" font="default" size="100%">M.S.</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Lake Bonney is a hypersaline permanently ice-covered lake in the Taylor Valley, Antarctica that hosts simplified microbial food-webs. Studied since the 1960s, there are many aspects which are poorly understood. Logistical constraints have prevented sampling during the austral winter, a 4-month period of 24-hour darkness. Our knowledge of how the resident photosynthetic microorganisms respond during this period is limited. With inputs from ephemeral glacial-melt streams the lake level (stage) of Bonney has risen more than 3 m since 2004. With no outflow streams, the only known water loss is via ablation of the permanent ice-cover. A study of the spatial and temporal changes in the phytoplankton community structure during this period of rapid lake level rise is lacking. During the summers (November-January) from 2004-05 to 2014-15 an in situ submersible spectrofluorometer was deployed in Lake Bonney to quantify the chlorophyll-a concentrations (microgram L -1) of four functional groups of microalgae (green algae, brown/mixed algae, cryptophytes, cyanobacteria) using known excitation/emission spectra. During the 2013-14 field season this same instrument was mounted on autonomous cable-crawling profilers deployed in both east and west lobes of Lake Bonney, obtaining the first ever daily profiles of chlorophyll-a concentration at an annual scale. Following a summer of rapid lake level rise (2010-11), an increasing trend in depth integrated chlorophyll-a concentration was observed in Lake Bonney. During the same period, the nutrient poor surface water has become increasingly dominated by green algae. Dramatic shifts were also observed in the phytoplankton communities during the polar night. The highest concentrations of mean chlorophyll-a were measured during the 24-hour darkness. Algal spectral groups containing species capable of a mixotrophic metabolism (brown/mixed and cryptophytes) increased in concentration and relative abundance when photosynthetically active radiation was unavailable. This work provides valuable contributions to our knowledge of long-term and year-round phytoplankton community dynamics in Lake Bonney, and improves our understanding of the metabolic strategies employed by organisms in this high latitude permanently ice-covered lake.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">masters</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kwon, Miye</style></author><author><style face="normal" font="default" size="100%">Kim, Mincheol</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Lee, Jaejin</style></author><author><style face="normal" font="default" size="100%">Hong, Soon Gyu</style></author><author><style face="normal" font="default" size="100%">Kim, Sang Jong</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Kim, Ok-Sun</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Niche specialization of bacteria in permanently ice-covered lakes of the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Microbiology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Environ Microbiol</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">06/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.13721</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">19</style></volume><pages><style face="normal" font="default" size="100%">2258 - 2271</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Perennially ice‐covered lakes in the McMurdo Dry Valleys, Antarctica, are chemically stratified with depth and have distinct biological gradients. Despite long‐term research on these unique environments, data on the structure of the microbial communities in the water columns of these lakes are scarce. Here, we examined bacterial diversity in five ice‐covered Antarctic lakes by 16S rRNA gene‐based pyrosequencing. Distinct communities were present in each lake, reflecting the unique biogeochemical characteristics of these environments. Further, certain bacterial lineages were confined exclusively to specific depths within each lake. For example, candidate division WM88 occurred solely at a depth of 15 m in Lake Fryxell, whereas unknown lineages of&amp;nbsp;&lt;em&gt;Chlorobi&lt;/em&gt;&amp;nbsp;were found only at a depth of 18 m in Lake Miers, and two distinct classes of&amp;nbsp;&lt;em&gt;Firmicutes&lt;/em&gt;&amp;nbsp;inhabited East and West Lobe Bonney at depths of 30 m. Redundancy analysis revealed that community variation of bacterioplankton could be explained by the distinct conditions of each lake and depth; in particular, assemblages from layers beneath the chemocline had biogeochemical associations that differed from those in the upper layers. These patterns of community composition may represent bacterial adaptations to the extreme and unique biogeochemical gradients of ice‐covered lakes in the McMurdo Dry Valleys.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">Achberger, Amanda</style></author><author><style face="normal" font="default" size="100%">Santibáñez, Pamela</style></author><author><style face="normal" font="default" size="100%">John E. Dore</style></author><author><style face="normal" font="default" size="100%">Hodson, Timothy</style></author><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">Jill Ai, Jill. Mikucki</style></author><author><style face="normal" font="default" size="100%">Skidmore, Mark L.</style></author><author><style face="normal" font="default" size="100%">Powell, Ross</style></author><author><style face="normal" font="default" size="100%">Adkins, W. Peyton</style></author><author><style face="normal" font="default" size="100%">Barbante, Carlo</style></author><author><style face="normal" font="default" size="100%">Mitchell, Andrew</style></author><author><style face="normal" font="default" size="100%">Scherer, Reed</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeochemistry and microbial diversity in the marine cavity beneath the McMurdo Ice Shelf, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title><short-title><style face="normal" font="default" size="100%">Limnol. Oceanogr.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2015</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://doi.wiley.com/10.1002/lno.v61.2http://doi.wiley.com/10.1002/lno.10234http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10234</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">61</style></volume><pages><style face="normal" font="default" size="100%">572 - 586</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Herbei, Radu</style></author><author><style face="normal" font="default" size="100%">Rytel, Alexander L.</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">Chris Jaros</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Hewitt, Judi</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Hydrological Controls on Ecosystem Dynamics in Lake Fryxell, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">PLOS ONE</style></secondary-title><short-title><style face="normal" font="default" size="100%">PLoS ONE</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">07/2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.plos.org/10.1371/journal.pone.0159038</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">e0159038</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">7</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">Saba, Grace</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">Fraser, William</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Sharon E. Stammerjohn</style></author><author><style face="normal" font="default" size="100%">Ross A. Virginia</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Impact of a Large-Scale Climate Event on Antarctic Ecosystem Processes</style></title><secondary-title><style face="normal" font="default" size="100%">BioScience</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://academic.oup.com/bioscience/article-pdf/66/10/848/7510601/biw110.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">848 - 863</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Extreme climate and weather events, such as a drought, hurricanes, or ice storms, can strongly imprint ecosystem processing and may alter ecosystem structure. Ecosystems in extreme environments are particularly vulnerable because of their adaptation to severe limitations in energy, water, or nutrients. The vulnerability can be expressed as a relatively long-lasting ecosystem response to a small or brief change in environmental conditions. Such an event occurred in Antarctica and affected two vastly different ecosystems: a marine-dominated coastal system and a terrestrial polar desert. Both sites experienced winds that warmed air temperatures above the 0&amp;deg;C threshold, resulting in extensive snow and ice melt and triggering a series of cascading effects through the ecosystems that are continuing to play out more than a decade later. This highlights the sensitivity of Antarctic ecosystems to warming events, which should occur more frequently in the future with global climate warming.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">10</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Bowman, Jeff S.</style></author><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Hugh W. Ducklow</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial Community Dynamics in Two Polar Extremes: The Lakes of the McMurdo Dry Valleys and the West Antarctic Peninsula Marine Ecosystem</style></title><secondary-title><style face="normal" font="default" size="100%">BioScience</style></secondary-title><short-title><style face="normal" font="default" size="100%">BioScience</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-10-2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://academic.oup.com/bioscience/article-lookup/doi/10.1093/biosci/biw103https://academic.oup.com/bioscience/article/66/10/829/2236137/Microbial-Community-Dynamics-in-Two-Polar-Extremes</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">829 - 847</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">10</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Achberger, Amanda</style></author><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Skidmore, Mark L.</style></author><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial Community Structure of Subglacial Lake Whillans, West Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Frontiers in Microbiology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Front. Microbiol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Oct-09-2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://journal.frontiersin.org/Article/10.3389/fmicb.2016.01457/abstract</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">7</style></volume><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbially mediated biogeochemical cycles in polar ice covered lakes</style></title><secondary-title><style face="normal" font="default" size="100%">Department of Ecology and Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://scholarworks.montana.edu/xmlui/handle/1/13793</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Bozeman, MT</style></pub-location><volume><style face="normal" font="default" size="100%">Ph.D.</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Lakes are important sites for globally-relevant biogeochemical cycles mediated by microorganisms. In the Arctic, seasonally ice covered thermokarst lakes are a large component in Earth&amp;#39;s carbon cycle due to their methane emissions from organic carbon degradation. In the Antarctic, over 400 unexplored lakes exist beneath the Antarctic ice sheet with unknown biogeochemical contributions to the Earth system. This dissertation seeks to investigate the biogeochemical role of microorganisms in the lake habitat and how they interact with the seasonal and permanent ice covers of lakes in polar environments. Microbiologically clean hot water drilling was used to access a subglacial lake beneath Antarctica&amp;#39;s ice to collect, for the first time, intact sediment and water samples. Laboratory experiments on Arctic and Antarctic, seasonally and perennially, respectively, ice covered lakes were used to investigate the impact of lake ice freezing regimes on microorganisms. My results show that subglacial lake sediments beneath the West Antarctic Ice Sheet contain solute ratios that suggest relict marine sediments were deposited during previous interglacial periods. Microbial activity overprints the marine geochemical signature to produce fluxes of ions into the Subglacial Lake Whillans water column, which ultimately drains to the Southern Ocean. Microbial activity in Subglacial Lake Whillans is partially fueled by biologically-formed methane diffusing from below our deepest collected (~38 cm) subglacial sediment samples. The ice above Subglacial Lake Whillans appears to be an important source of molecular oxygen for microorganisms to drive oxidative physiologies. My experimental evidence shows microorganisms incorporate into lake ice cover to, potentially, avoid increasing stressors from progressive lake ice freezing. Taken together, the results from this dissertation reinforce the hypothesis that subglacial environments beneath the Antarctic ice sheet are habitats for life. Further, the microorganisms in subglacial lakes participate in globally-relevant biogeochemical cycles. Here, I extend the extent of the biosphere and show sediments at the base of ice sheets are an active component of the Earth system.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">doctoral</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">J. A. Hicks</style></author><author><style face="normal" font="default" size="100%">Christopher P. McKay</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Modeling the thickness of perennial ice covers on stratified lakes of the Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Glaciology</style></secondary-title><short-title><style face="normal" font="default" size="100%">J. Glaciol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">06/2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.journals.cambridge.org/abstract_S0022143016000691</style></url></web-urls></urls><pages><style face="normal" font="default" size="100%">1 - 10</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;div class=&quot;publication-abstract&quot; data-reactid=&quot;88&quot; style=&quot;margin-top: 20px; margin-bottom: 20px; color: rgb(17, 17, 17); font-family: Roboto, Arial, sans-serif; font-size: 12px; line-height: 18px;&quot;&gt;&lt;div class=&quot;nova-e-text nova-e-text--size-l nova-e-text--family-sans-serif nova-e-text--spacing-auto&quot; data-reactid=&quot;91&quot; style=&quot;text-transform: inherit; margin-bottom: 1.25em; color: inherit; font-size: 1rem; line-height: 1.3;&quot;&gt;A 1-D ice cover model was developed to predict and constrain drivers of long-term ice thickness trends in chemically stratified lakes of Taylor Valley, Antarctica. The model is driven by surface radiative heat fluxes and heat fluxes from the underlying water column. The model successfully reproduced 16 a (between 1996 and 2012) of ice thickness changes for the west lobe of Lake Bonney (average ice thickness = 3.53 m) and Lake Fryxell (average ice thickness = 4.22 m). Long-term ice thickness trends require coupling with the thermal structure of the water column. The heat stored within the temperature maximum of lakes exceeding a liquid water column depth of 20 m can either impede or facilitate ice thickness change depending on the predominant climatic trend (cooling or warming). As such, shallow (&amp;lt;20 m deep water columns) perennially ice-covered lakes without deep temperature maxima are more sensitive indicators of climate change. The long-term ice thickness trends are a result of surface energy flux and heat flux from the deep temperature maximum in the water column, the latter of which results from absorbed solar radiation.&lt;/div&gt;&lt;/div&gt;&lt;p&gt;&amp;nbsp;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue><section><style face="normal" font="default" size="100%">1</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">Michael P.  Lizotte</style></author><author><style face="normal" font="default" size="100%">Weidong Kong</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Photoadaptation to the polar night by phytoplankton in a permanently ice-covered Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">05/2015</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.10107</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">61</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 12px; line-height: 18px;&quot;&gt;Photosynthetic microorganisms are a primary source of new organic carbon production in polar ecosystems. Despite their importance, relatively little is known about how they adapt to the bimodal solar cycles that exist at high latitudes. To understand how phytoplankton adapt to the extreme seasonal change in photoperiod, we transplanted cultures of a well-studied laboratory model for photosynthetic cold adaptation,&amp;nbsp;&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 12px; font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 18px; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;&quot;&gt;Chlamydomonas raudensis&lt;/em&gt;&lt;span style=&quot;font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 12px; line-height: 18px;&quot;&gt;&amp;nbsp;UWO241, back to the water column of Lake Bonney (McMurdo Dry Valleys, Antarctica) at the depth from which it was originally cultured. The organism was suspended at this depth in dialysis tubing to allow the microalga to respond to the in situ light, temperature and dissolved ions. We then integrated in situ biological and chemical measurements with environmental molecular analyses and compared the responses of transplanted&amp;nbsp;&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 12px; font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 18px; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;&quot;&gt;C. raudensis&lt;/em&gt;&lt;span style=&quot;font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 12px; line-height: 18px;&quot;&gt;&amp;nbsp;cultures with the natural phytoplankton community over the 6-week transition from Antarctic summer (24-h daylight) to polar night (24-h darkness). As solar radiation declined, natural communities exhibited a cessation of inorganic carbon fixation which was accompanied by a downregulation of expression of genes encoding for essential carbon fixation and photochemistry proteins. Transplanted&amp;nbsp;&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 12px; font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 18px; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;&quot;&gt;C. raudensis&lt;/em&gt;&lt;span style=&quot;font-family: Arial, 'Lucida Grande', Geneva, Verdana, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 12px; line-height: 18px;&quot;&gt;&amp;nbsp;cultures matched natural community trends in the regulation of photochemistry and carbon fixation gene expression, and shifted photochemical function to a shade adapted state in response to the polar night transition. We present a conceptual model for seasonal shifts in microbial community energy and carbon acquisition which integrates past cultivation-based studies in this model photopsychrophile with a body of recent work on adaptation of natural populations to polar night.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kudalkar, Priyanka S.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Physiological characteristics of fungi associated with Antarctic environments</style></title><secondary-title><style face="normal" font="default" size="100%">Land Resources and Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://scholarworks.montana.edu/xmlui/handle/1/9835</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Bozeman, MT</style></pub-location><volume><style face="normal" font="default" size="100%">M.S.</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The permanent ice covers on the lakes of Antarctica&amp;#39;s McMurdo Dry Valleys region harbor a diverse group of phototrophic and heterotrophic microorganisms that metabolize during the short summer months when solar radiation produces melt inclusions within the ice and provides energy to drive photosynthesis. Laboratory cultures of fungi were obtained from ice cores taken from Lakes Bonney (east lobe) and Chad, and sediments collected from Subglacial Lake Whillans (West Antarctica). Using molecular techniques, the internal transcribed spacer (ITS) region of the ribosomal DNA (rDNA) was sequenced to identify fungal types and to determine whether they may be unique to this region. Four axenic fungal cultures, Tetracladium ellipsoideum, Lecythophora hoffmannii, Mucor sp., and an unidentified Ascomycota were successfully isolated. These isolates are closely related to organisms that have been previously reported in Antarctica and other cold habitats. The isolates were tested for growth characteristics under various temperature and nutrient regimes. Temperature response experiments revealed that all the isolated fungi were psychrotolerant and growth rates were greatest at 25&amp;deg;C. Of major significance in evaluating the potential of Antarctic fungi as a bioresource is their ability to produce bioactive compounds. Two out of four isolated organisms exhibited antimicrobial activity against several plant pathogens. The metabolic potential and preferred substrate utilization was examined by exposing fungal isolates to a variety of substrates in a 96 well &amp;quot;Biolog&amp;quot; plate. A strong correlation was found among substrate utilization, isolates, temperature and the different carbon substrates. This experiment revealed that the isolated fungi have preferences for different labile carbon substrates at 4&amp;deg;C and 24&amp;deg;C which may imply different physiologies at different times of year in the lake ice-covers. Results from my studies will help understand the role of fungi in lake ice and subglacial lake sediment ecosystems, and the physiology of fungi living in cold environments.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">masters</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">Mitchell, Andrew</style></author><author><style face="normal" font="default" size="100%">Achberger, Amanda</style></author><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">John E. Dore</style></author><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">Jill A. Mikucki</style></author><author><style face="normal" font="default" size="100%">Purcell, Alicia M.</style></author><author><style face="normal" font="default" size="100%">Skidmore, Mark L.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors><translated-authors><author><style face="normal" font="default" size="100%">The WISSARD Science Team</style></author></translated-authors></contributors><titles><title><style face="normal" font="default" size="100%">Physiological Ecology of Microorganisms in Subglacial Lake Whillans</style></title><secondary-title><style face="normal" font="default" size="100%">Frontiers in Microbiology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Front. Microbiol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Mar-10-2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://journal.frontiersin.org/article/10.3389/fmicb.2016.01705/fullhttp://journal.frontiersin.org/article/10.3389/fmicb.2016.01705/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">7</style></volume><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">Friedlaender, Ari S.</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">Li, Wei</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Schofield, Oscar</style></author><author><style face="normal" font="default" size="100%">Sharon E. Stammerjohn</style></author><author><style face="normal" font="default" size="100%">Steinberg, Deborah K.</style></author><author><style face="normal" font="default" size="100%">Hugh W. Ducklow</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Responses of Antarctic Marine and Freshwater Ecosystems to Changing Ice Conditions</style></title><secondary-title><style face="normal" font="default" size="100%">BioScience</style></secondary-title><short-title><style face="normal" font="default" size="100%">BioScience</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-10-2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://academic.oup.com/bioscience/article-lookup/doi/10.1093/biosci/biw109https://academic.oup.com/bioscience/article/66/10/864/2415532/Responses-of-Antarctic-Marine-and-Freshwater</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">864 - 879</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">10</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Unraveling ecosystem responses to climate change on the Antarctic continent through Long-Term Ecological Research</style></title><secondary-title><style face="normal" font="default" size="100%">BioScience</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://academic.oup.com/bioscience/article/66/10/799/2236166</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">799 - 800</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">10</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Winslow, Luke A.</style></author><author><style face="normal" font="default" size="100%">Hilary A. Dugan</style></author><author><style face="normal" font="default" size="100%">Heather N. Buelow</style></author><author><style face="normal" font="default" size="100%">Cronin, Kyle D.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Autonomous Year-Round Sampling and Sensing to Explore the Physical and Biological Habitability of Permanently Ice-Covered Antarctic Lakes</style></title><secondary-title><style face="normal" font="default" size="100%">Marine Technology Society Journal</style></secondary-title><short-title><style face="normal" font="default" size="100%">mar technol soc j</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-09-2014</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://openurl.ingenta.com/content/xref?genre=article&amp;issn=0025-3324&amp;volume=48&amp;issue=5&amp;spage=8http://www.ingentaconnect.com/content/mts/mtsj/2014/00000048/00000005/art00002</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">48</style></volume><pages><style face="normal" font="default" size="100%">8 - 17</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(45, 44, 44); font-family: OpenSansRegular; font-size: 13px; line-height: 18.5714302062988px;&quot;&gt;The lakes of the McMurdo Dry Valleys, Antarctica, are some of the only systems on our planet that are perennially ice-covered and support year-round metabolism. As such, these ecosystems can provide important information on conditions and life in polar regions on Earth and on other icy worlds in our solar system. Working in these extreme environments of the Dry Valleys poses many challenges, particularly with respect to data collection during dark winter months when logistical constraints make fieldwork difficult. In this paper, we describe the motivation, design, and challenges for this recently deployed instrumentation in Lake Bonney, a lake that has been the subject of summer research efforts for more than 40 years. The instrumentation deployed includes autonomous water, phytoplankton, and sediment samplers as well as cable-mounted profiling platforms with dissolved gas and fluorometry sensors. Data obtained from these instruments will allow us, for the first time, to define the habitability of this environment during the polar night. We include lessons learned during deployment and recommendations for effective instrument operation in these extreme conditions.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Yuan, Xu</style></author><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Linda A. Amaral-Zettler</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Ciliate diversity, community structure and novel taxa in lakes of the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Biological Bulleting</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2014</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">227</style></volume><pages><style face="normal" font="default" size="100%">175-190</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We report an in-depth survey of next-generation DNA sequencing of ciliate diversity and community structure in two permanently ice-covered McMurdo Dry Valley lakes during the austral summer and autumn (November 2007 and March 2008). We tested hypotheses on the relationship between species richness and environmental conditions including environmental extremes, nutrient status, and day length. On the basis of the unique environment that exists in these high-latitude lakes, we expected that novel taxa would be present. Alpha diversity analyses showed that extreme conditions-that is, high salinity, low oxygen, and extreme changes in day length-did not impact ciliate richness; however, ciliate richness was 30% higher in samples with higher dissolved organic matter. Beta diversity analyses revealed that ciliate communities clustered by dissolved oxygen, depth, and salinity, but not by season (i.e., day length). The permutational analysis of variance test indicated that depth, dissolved oxygen, and salinity had significant influences on the ciliate community for the abundance matrices of resampled data, while lake and season were not significant. This result suggests that the vertical trends in dissolved oxygen concentration and salinity may play a critical role in structuring ciliate communities. A PCR-based strategy capitalizing on divergent eukaryotic V9 hypervariable region ribosomal RNA gene targets unveiled two new genera in these lakes. A novel taxon belonging to an unknown class most closely related to Cryptocaryon irritans was also inferred from separate gene phylogenies.</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><section><style face="normal" font="default" size="100%">175</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Linda A. Amaral-Zettler</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Modular community structure suggests metabolic plasticity during the transition to polar night in ice-covered Antarctic lakes</style></title><secondary-title><style face="normal" font="default" size="100%">The ISME Journal</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2013</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.nature.com/ismej/journal/vaop/ncurrent/full/ismej2013190a.html</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Maciek K. Obryk</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The permanent ice cover of Lake Bonney, Antarctica: The influence of thickness and sediment distribution on photosynthetically available radiation and chlorophyll-a distribution in the underlying water column</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research: Biogeosciences</style></secondary-title><short-title><style face="normal" font="default" size="100%">J. Geophys. Res. Biogeosci.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">09/2014</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://doi.wiley.com/10.1002/2014JG002672</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">119</style></volume><pages><style face="normal" font="default" size="100%">1879 - 1891</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;The thick permanent ice cover on the lakes of the McMurdo Dry Valleys, Antarctica, inhibits spatial lake sampling due to logistical constraints of penetrating the ice cover. To date most sampling of these lakes has been made at only a few sites with the assumption that there is a spatial homogeneity of the physical and biogeochemical properties of the ice cover and the water column at any given depth. To test this underlying assumption, an autonomous underwater vehicle (AUV) was deployed in Lake Bonney, Taylor Valley. Measurements were obtained over the course of 2 years in a 100 &amp;times; 100 m horizontal sampling grid (at a 0.2&amp;thinsp;m vertical resolution). Additionally, the AUV measured the ice thickness (in water equivalent) and collected images looking up through the ice, which were used to quantify sediment distribution on the surface and within the ice. Satellite imagery was used to map sediment distribution on the surface of the ice. We present results of the spatial investigation of the sediment distribution on the ice cover and its effects on biological processes, with particular emphasis on photosynthetically active radiation (PAR). The surface sediment is a secondary controller of the ice cover thickness, which in turn controls the depth-integrated PAR in the water column. Our data revealed that depth-integrated PAR was negatively correlated with depth-integrated chlorophyll-a (&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 16px; color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 24px; background: 0px 0px rgb(249, 249, 249);&quot;&gt;r&lt;/em&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;&amp;thinsp;=&amp;thinsp;0.88,&amp;nbsp;&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 16px; color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 24px; background: 0px 0px rgb(249, 249, 249);&quot;&gt;p&lt;/em&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;&amp;thinsp;&amp;lt;&amp;thinsp;0.001,&amp;nbsp;&lt;/span&gt;&lt;em style=&quot;outline: 0px; font-size: 16px; color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; line-height: 24px; background: 0px 0px rgb(249, 249, 249);&quot;&gt;n&lt;/em&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;&amp;thinsp;=&amp;thinsp;83), which appears to be related to short-term photoadaptation of phytoplanktonic communities to spatial and temporal variation in PAR within the water column.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">9</style></issue><section><style face="normal" font="default" size="100%">1879</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author><author><style face="normal" font="default" size="100%">Häggblom, Max</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Polar and alpine microbiology in a changing world</style></title><secondary-title><style face="normal" font="default" size="100%">FEMS Microbiology Ecology</style></secondary-title><short-title><style face="normal" font="default" size="100%">FEMS Microbiol Ecol</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">08/2014</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/1574-6941.12371/abstract</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">89</style></volume><pages><style face="normal" font="default" size="100%">209 - 210</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue><section><style face="normal" font="default" size="100%">209</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Marie Šabacká</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Hassan J. Basagic</style></author><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">Diana H. Wall</style></author><author><style face="normal" font="default" size="100%">Ross A. Virginia</style></author><author><style face="normal" font="default" size="100%">Mark C. Greenwood</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Aeolian flux of biotic and abiotic material in Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Geomorphology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">6/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S0169555X11006222</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">155-156</style></volume><pages><style face="normal" font="default" size="100%">102 - 111</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterioplankton productivity in lakes of the Taylor Valley, Antarctica, during the polar night transition</style></title><secondary-title><style face="normal" font="default" size="100%">Aquatic Microbial Ecology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Aquat. Microb. Ecol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2013</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.int-res.com/abstracts/ame/v68/n1/p77-90</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">68</style></volume><pages><style face="normal" font="default" size="100%">77 - 90</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: Arial, Helvetica, Geneva, Helvetica, sans-serif; font-size: 12px; line-height: 18px; text-align: justify;&quot;&gt;Research on the lakes of the McMurdo Dry Valleys, Antarctica, is typically conducted during the period of 24 h sunlight (October to January) when logistical support is readily available. As part of the International Polar Year initiative, we obtained logistical support to study microbial dynamics in the permanently ice-covered lakes of the Taylor Valley during the transition from 24 h of sunlight to the complete darkness of the polar night (mid-April). Our study focused on the perennially ice-covered lakes Fryxell (FRX), East Lobe Bonney (ELB), and West Lobe Bonney (WLB), all of which are chemically stratified and have food webs dominated by microorganisms. Depth-integrated bacterioplankton productivity (BP; leucine incorporation [Leu] and thymidine incorporation [TdR]) in the lakes ranged from 1.2 to 3.4 mg C m&lt;/span&gt;&lt;span style=&quot;font-size: smaller; position: relative; bottom: 0.4em; color: rgb(51, 51, 51); font-family: Arial, Helvetica, Geneva, Helvetica, sans-serif; line-height: 18px; text-align: justify;&quot;&gt;&amp;minus;2&lt;/span&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: Arial, Helvetica, Geneva, Helvetica, sans-serif; font-size: 12px; line-height: 18px; text-align: justify;&quot;&gt;&amp;nbsp;d&lt;/span&gt;&lt;span style=&quot;font-size: smaller; position: relative; bottom: 0.4em; color: rgb(51, 51, 51); font-family: Arial, Helvetica, Geneva, Helvetica, sans-serif; line-height: 18px; text-align: justify;&quot;&gt;&amp;minus;1&lt;/span&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: Arial, Helvetica, Geneva, Helvetica, sans-serif; font-size: 12px; line-height: 18px; text-align: justify;&quot;&gt;. Overall, summer was characterized by relatively high rates of BP and photoautotrophic primary productivity. Rapid decreases in photosynthetically active radiation marked a subsequent transition period, which was characterized by variable cell counts and decreasing Leu:TdR ratios (ratios &amp;gt;1 signify a physiological shift from growth to maintenance mode). Finally, cell counts decreased and Leu:TdR increased by as much as 280% during the fall, revealing a distinct change in the physiological state of the bacterioplankton as light-mediated primary productivity ceased. Our data reveal that the shift in physiological state may result from a switch from contemporary phytoplankton-excreted carbon to other sources of dissolved organic carbon, which can support the bacterioplankton populations through the winter.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Barletta, Robert E.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Mader, Heidy M.</style></author><author><style face="normal" font="default" size="100%">Jones, Warren L.</style></author><author><style face="normal" font="default" size="100%">Roe, Christopher H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Chemical analysis of ice vein microenvironments: II. Analysis of glacial samples from Greenland and Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Glaciology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.montana.edu/priscu/DOCS/Publications/BarlettaEtAl2012IceVein.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">58</style></volume><pages><style face="normal" font="default" size="100%">1109 - 1118</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">212</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alexander B. Michaud</style></author><author><style face="normal" font="default" size="100%">Marie Šabacká</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cyanobacterial diversity across landscape units in a polar desert: Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">FEMS Microbiology Ecology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/j.1574-6941.2012.01297.x/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">82</style></volume><pages><style face="normal" font="default" size="100%">268 - 278</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Weidong Kong</style></author><author><style face="normal" font="default" size="100%">David C. Ream</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Diversity and Expression of RubisCO Genes in a Perennially Ice-Covered Antarctic Lake during the Polar Night Transition</style></title><secondary-title><style face="normal" font="default" size="100%">Applied and Environmental Microbiology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://aem.asm.org/content/78/12/4358.short</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">78</style></volume><pages><style face="normal" font="default" size="100%">4358-4366</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">12</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Weidong Kong</style></author><author><style face="normal" font="default" size="100%">Jenna M. Dolhi</style></author><author><style face="normal" font="default" size="100%">Amy Chiuchiolo</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Evidence of form II RubisCO ( cbbM) in a perennially ice-covered Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">FEMS Microbiology Ecology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/j.1574-6941.2012.01431.x/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">82</style></volume><pages><style face="normal" font="default" size="100%">491 - 500</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jill Thurman</style></author><author><style face="normal" font="default" size="100%">Jacqueline Parry</style></author><author><style face="normal" font="default" size="100%">Philip J. Hill</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">Amy Chiuchiolo</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial dynamics and flagellate grazing during transition to winter in Lakes Hoare and Bonney, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">FEMS Microbiology Ecology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/j.1574-6941.2012.01423.x/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">82</style></volume><pages><style face="normal" font="default" size="100%">449 - 458</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">A. E. Murray</style></author><author><style face="normal" font="default" size="100%">Kenig, Fabien</style></author><author><style face="normal" font="default" size="100%">Christian H. Fritsen</style></author><author><style face="normal" font="default" size="100%">Christopher P. McKay</style></author><author><style face="normal" font="default" size="100%">Kaelin M. Cawley</style></author><author><style face="normal" font="default" size="100%">R. L. Edwards</style></author><author><style face="normal" font="default" size="100%">Kuhn, Emanuele</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">Nathaniel E Ostrom</style></author><author><style face="normal" font="default" size="100%">Vivian Peng</style></author><author><style face="normal" font="default" size="100%">Adrian Ponce</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Samarkin, Vladimir A.</style></author><author><style face="normal" font="default" size="100%">Ashley T Townsend</style></author><author><style face="normal" font="default" size="100%">Protima Wagh</style></author><author><style face="normal" font="default" size="100%">Seth A Young</style></author><author><style face="normal" font="default" size="100%">Pung To Yung</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial life at -13  C in the brine of an ice-sealed Antarctic lake</style></title><secondary-title><style face="normal" font="default" size="100%">Proceedings of the National Academy of Sciences</style></secondary-title><short-title><style face="normal" font="default" size="100%">Proceedings of the National Academy of Sciences</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.pnas.org/cgi/doi/10.1073/pnas.1208607109</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">109</style></volume><pages><style face="normal" font="default" size="100%">20626 - 20631</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">50</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">W. Andrew Jackson</style></author><author><style face="normal" font="default" size="100%">Alfonso F. Davila</style></author><author><style face="normal" font="default" size="100%">Nubia Estrada</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">John D. Coates</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Perchlorate and chlorate biogeochemistry in ice-covered lakes of the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Geochimica et Cosmochimica Acta</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S001670371200511X</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">98</style></volume><pages><style face="normal" font="default" size="100%">19 - 30</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>6</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alessandro Febretti</style></author><author><style face="normal" font="default" size="100%">Kristof Richmond</style></author><author><style face="normal" font="default" size="100%">Gulati, Shilpa</style></author><author><style face="normal" font="default" size="100%">Flesher, Christopher</style></author><author><style face="normal" font="default" size="100%">Hogan, Bartholomew P.</style></author><author><style face="normal" font="default" size="100%">Andrew Johnson</style></author><author><style face="normal" font="default" size="100%">Stone, William C.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Bebis, George</style></author><author><style face="normal" font="default" size="100%">Boyle, Richard</style></author><author><style face="normal" font="default" size="100%">Parvin, Bahram</style></author><author><style face="normal" font="default" size="100%">Koracin, Darko</style></author><author><style face="normal" font="default" size="100%">Fowlkes, Charless</style></author><author><style face="normal" font="default" size="100%">Wang, Sen</style></author><author><style face="normal" font="default" size="100%">Choi, Min-Hyung</style></author><author><style face="normal" font="default" size="100%">Mantler, Stephan</style></author><author><style face="normal" font="default" size="100%">Schulze, Jürgen</style></author><author><style face="normal" font="default" size="100%">Acevedo, Daniel</style></author><author><style face="normal" font="default" size="100%">Mueller, Klaus</style></author><author><style face="normal" font="default" size="100%">Papka, Michael</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Poisson Reconstruction of Extreme Submersed Environments: The ENDURANCE Exploration of an Under-Ice Antarctic Lake</style></title><secondary-title><style face="normal" font="default" size="100%">Advances in Visual Computing. ISVC 2012. Lecture Notes in Computer Science.</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/content/hg97w43588229087/</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Springer Berlin Heidelberg</style></publisher><pub-location><style face="normal" font="default" size="100%">Berlin, Heidelberg</style></pub-location><volume><style face="normal" font="default" size="100%">7431</style></volume><pages><style face="normal" font="default" size="100%">394 - 403</style></pages><isbn><style face="normal" font="default" size="100%">978-3-642-33179-4</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;We evaluate the use of Poisson reconstruction to generate a 3D bathymetric model of West Lake Bonney, Antarctica. The source sonar dataset has been collected by the ENDURANCE autonomous ve- hicle in the course of two Antarctic summer missions. The reconstruction workflow involved processing 200 million datapoints to generate a high resolution model of the lake bottom, Narrows region and underwater glacier face. A novel and flexible toolset has been developed to automate the processing of the Bonney data.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Marie Šabacká</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Wind as an ecological factor in the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Department of Land Resources &amp; Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://scholarworks.montana.edu/xmlui/handle/1/2171</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Bozeman, MT</style></pub-location><volume><style face="normal" font="default" size="100%">Ph.D.</style></volume><pages><style face="normal" font="default" size="100%">201</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The aim of this work was to investigate the role of wind on the ecology of the McMurdo Dry Valleys in Antarctica (MDV), one of the coldest and driest deserts on Earth. The MDV landscape consists of a mosaic of permanently ice-covered lakes, ephemeral streams, exposed soils, and glaciers, all of which contain habitats dominated by microorganisms. Data on wind-driven flux of sediments and associated organic matter were collected using passive aeolian traps and dynamic mass erosion particle counters to investigate the timing, direction and magnitude of aeolian sediment transport. Combination of genomic techniques and phenotypical fingerprinting (pigment analysis) was used to examine microbial diversity over a wide variety of wind-eroded habitats across the MDV landscape to elucidate the role of wind dispersal on the contemporary distribution of microorganisms across the MDVs. Sediment entrainment occurs predominantly within 20 cm of the ground surface and has character of saltation bursts that occupy &amp;lt;3% of the total time within a year. The high-energy winter föhn winds uplift sediments in the upper parts of the MDVs and transport them down-valley where they are deposited onto the surface of perennially ice-covered lakes and surrounding soils. The sediment that enters the water column of the lakes does not provide a significant source of organic carbon for bacterioplankton communities compared to the in situ production by phytoplankton but can be a source of new microbial propagules. The aeolian material is low in organic matter (&amp;lt;1% dw) but is composed of a relatively large numbers of cyanobacterial taxa (~20 OTUs) that can be found in all other MDV habitats. In conclusion, wind distributes microorganisms across the MDV landscape but local environment selects for specific taxa. Predicted climate warming will increase the importance of wind transport, which will affect nutrient cycling and connectivity among MDV ecosystem components.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">doctoral</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>6</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Grebmeier, J.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Frontiers in Understanding Climate Change and Polar  Ecosystems</style></title><secondary-title><style face="normal" font="default" size="100%">Committee on Frontiers in Understanding Climate Change and Polar Ecosystems Polar Research  Board Division of Earth and Life Studies</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><publisher><style face="normal" font="default" size="100%">The National Academies Press</style></publisher><isbn><style face="normal" font="default" size="100%">0-309-21087-9</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Scott Bielewicz</style></author><author><style face="normal" font="default" size="100%">Elanor R. Bell</style></author><author><style face="normal" font="default" size="100%">Weidong Kong</style></author><author><style face="normal" font="default" size="100%">Iddo Friedberg</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition</style></title><secondary-title><style face="normal" font="default" size="100%">The ISME Journal</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">9/2011</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.nature.com/ismej/journal/v5/n9/abs/ismej201123a.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">5</style></volume><pages><style face="normal" font="default" size="100%">1559 - 1564</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">9</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Samarkin, Vladimir A.</style></author><author><style face="normal" font="default" size="100%">Madigan, Michael T.</style></author><author><style face="normal" font="default" size="100%">Bowles, Marshall W.</style></author><author><style face="normal" font="default" size="100%">Karen L. Casciotti</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Christopher P. McKay</style></author><author><style face="normal" font="default" size="100%">Joye, Samantha B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Abiotic nitrous oxide emission from the hypersaline Don Juan Pond in Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Nature Geoscience</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">5/2010</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.nature.com/ngeo/journal/v3/n5/full/ngeo847.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">3</style></volume><pages><style face="normal" font="default" size="100%">341 - 344</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">5</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Trista J. Vick-Majors</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterioplakton dynamics in stratified lakes of the Taylor Valley, Antarctica during the transition to polar night</style></title><secondary-title><style face="normal" font="default" size="100%">Land Resources &amp; Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://scholarworks.montana.edu/xmlui/handle/1/2477</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Bozeman, MT</style></pub-location><volume><style face="normal" font="default" size="100%">M.S.</style></volume><pages><style face="normal" font="default" size="100%">83</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Limnological research on the lakes of the McMurdo Dry Valleys (MCM), Antarctica, is typically carried out during the austral spring-summer (October January) when logistical support is readily available; the current study marks the first sampling effort during the summer-fall transition (January-April). Sampling during the darkness of winter is logistically difficult and expensive, and my study is an important step towards understanding the year-round ecology of the dry valley lakes. Bacterial productivity, measured as protein synthesis and DNA replication, and bacterial cell numbers were measured 10-12 times between October 2007 and April 2008 in Lakes Fryxell (FRX) and the east and west lobes of Lake Bonney (ELB and WLB). Lake Fryxell was the most productive (bacterial) lake on average by an order of magnitude (average = 1.24 mg C m -&amp;sup2;d -&amp;sup1;; range = 0.00 to 3.29 mg C m -&amp;sup2;d -&amp;sup1;), and also contained the greatest bacterial biomass (~10 ⁶ cells ml -&amp;sup1;) by 1 to 3 orders of magnitude. If bacterial production were directly linked to organic carbon supplied by photosynthetic primary production, a decrease in bacterial production would be expected during the sunset; however, no statistically significant change in bacterial production (a=0.05) was observed during the summer-fall transition. A distinct decoupling of bacterial protein production and DNA replication was detected in FRX and ELB of the lakes as the season progressed, and was present in WLB throughout the season, indicating either a shift towards a lower growth-rate in response to decreasing light or nutrient supply, or a mechanism for dealing with the perennially low temperatures, low light, and nutrient poor conditions in the lakes. Overall, it appears that bacterial communities remain active during the darkness of winter, when the lakes enter a period of &amp;quot;net heterotrophy&amp;quot;, which cannot be sustained unless the carbon balance of the TV lakes is reset by climatic events.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">masters</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Wadham, J. L.</style></author><author><style face="normal" font="default" size="100%">Martyn Tranter</style></author><author><style face="normal" font="default" size="100%">Skidmore, M</style></author><author><style face="normal" font="default" size="100%">Hodson, A. J.</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Sharp, M.</style></author><author><style face="normal" font="default" size="100%">Wynn, P.</style></author><author><style face="normal" font="default" size="100%">Margaret S. Jackson</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeochemical weathering under ice: Size matters</style></title><secondary-title><style face="normal" font="default" size="100%">Global Biogeochemical Cycles</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">24</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">3</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Stone, W</style></author><author><style face="normal" font="default" size="100%">Bartholomew P Hogan</style></author><author><style face="normal" font="default" size="100%">Flesher, C</style></author><author><style face="normal" font="default" size="100%">Gulati, S</style></author><author><style face="normal" font="default" size="100%">Kristof Richmond</style></author><author><style face="normal" font="default" size="100%">Murarka, A</style></author><author><style face="normal" font="default" size="100%">Kuhlman, G</style></author><author><style face="normal" font="default" size="100%">Idharan, M</style></author><author><style face="normal" font="default" size="100%">Siegel, V</style></author><author><style face="normal" font="default" size="100%">Price, R M</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Design and deployment of a four-degrees-of-freedom hovering autonomous underwater vehicle for sub-ice exploration and mapping</style></title><secondary-title><style face="normal" font="default" size="100%">Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2010</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">224</style></volume><pages><style face="normal" font="default" size="100%">341 - 361</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">4</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author><author><style face="normal" font="default" size="100%">Lydia H. Zeglin</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Factors promoting microbial diversity in the McMurdo Dry Valleys</style></title><secondary-title><style face="normal" font="default" size="100%">Life in Antarctic Deserts and other Cold Dry Environments: Astrobiological Analogues</style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">Cambridge Astrobiology</style></tertiary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://ebooks.cambridge.org/chapter.jsf?bid=CBO9780511712258&amp;cid=CBO9780511712258A015</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Cambridge University Press</style></publisher><volume><style face="normal" font="default" size="100%">5</style></volume><pages><style face="normal" font="default" size="100%">221-257</style></pages><isbn><style face="normal" font="default" size="100%">9780521889193</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Herbei, Radu</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author><author><style face="normal" font="default" size="100%">Christopher B. Gardner</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Physiochemical properties influencing biomass abundance and primary production in Lake Hoare, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Ecological Modelling</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Steven M. Jepsen</style></author><author><style face="normal" font="default" size="100%">Edward E. Adams</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sediment Melt Dynamics in Permanent Antarctic Lake Ice</style></title><secondary-title><style face="normal" font="default" size="100%">Arctic, Antarctic, and Alpine Research</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://mcmlter.lternet.edu/reports/lakes/JepsenEtAl2010SedimentMeltMigration.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">42</style></volume><pages><style face="normal" font="default" size="100%">57-66</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Whisner, Carla</style></author><author><style face="normal" font="default" size="100%">Christopher B. Gardner</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Spatial variations in the geochemistry of glacial meltwater streams in the Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Antarctic Science</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12/2010</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.montana.edu/lkbonney/DOCS/Publications/WelchEtAl2010Geochemistry.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">22</style></volume><pages><style face="normal" font="default" size="100%">662 - 672</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">06</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Markus Dieser</style></author><author><style face="normal" font="default" size="100%">Nocker, Andreas</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Christine M. Foreman</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Viable microbes in ice: application of molecular assays to McMurdo Dry Valley lake ice communities</style></title><secondary-title><style face="normal" font="default" size="100%">Antarctic Science</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2010</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://journals.cambridge.org/action/displayAbstract?fromPage=online&amp;aid=7909836&amp;fileId=S0954102010000404</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">22</style></volume><pages><style face="normal" font="default" size="100%">470 - 476</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The permanent ice covers of the McMurdo Dry Valley lakes, Antarctica, are colonized by a diverse microbial assemblage. We collected ice cores from Lakes Fryxell, Hoare and Bonney. Propidium monoazide (PMA) was used in combination with quantitative PCR (qPCR) and denaturing gradient gel electrophoresis (DGGE) to examine membrane integrity of prokaryotes in these extreme environments. PMA selectively penetrates cells with compromised membranes and modifies their DNA resulting in the suppression of PCR amplification. Our results based on analysis of 16S rRNA genes demonstrate that despite the hostile conditions of the Dry Valleys, the permanent ice covers of the lakes support a &amp;lsquo;potentially viable&amp;rsquo; microbial community. The level of membrane integrity, as well as diversity, was higher in samples where sediment was entrapped in the ice cover. Pronounced differences in the fraction of cells with intact and compromised cell membranes were found for Lake Fryxell and east lobe of Lake Bonney, both expressed in differences in DGGE banding patterns and qPCR signal reductions. Limitations in the ability to distinguish between intact or compromised cells occurred in samples from Lake Hoare and west lobe of Lake Bonney due to low DNA template concentrations recovered from the samples.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">05</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jaraula, C</style></author><author><style face="normal" font="default" size="100%">Kenig, Fabien</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Composition and Biodegradation of a Synthetic Oil Spilled on the Perennial Ice Cover of Lake Fryxell, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Science &amp; Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2009</style></year></dates><volume><style face="normal" font="default" size="100%">43</style></volume><pages><style face="normal" font="default" size="100%">2708-2713</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jill A. Mikucki</style></author><author><style face="normal" font="default" size="100%">Pearson, A</style></author><author><style face="normal" font="default" size="100%">Johnston, D</style></author><author><style face="normal" font="default" size="100%">Turchyn, A</style></author><author><style face="normal" font="default" size="100%">Farquhar, J</style></author><author><style face="normal" font="default" size="100%">Schrag, D</style></author><author><style face="normal" font="default" size="100%">Anbar, A</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Lee, P</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A Contemporary Microbially Maintained Subglacial Ferrous &quot;Ocean&quot;</style></title><secondary-title><style face="normal" font="default" size="100%">Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Biggie</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2009</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencemag.org/content/324/5925/397.short</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">324</style></volume><pages><style face="normal" font="default" size="100%">397-400</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Lucida Grande', arial, helvetica, sans-serif; font-size: 12px; font-weight: bold; line-height: 18px; background-color: rgb(238, 238, 238);&quot;&gt;An active microbial assemblage cycles sulfur in a sulfate-rich, ancient marine brine beneath Taylor Glacier, an outlet glacier of the East Antarctic Ice Sheet, with Fe(III) serving as the terminal electron acceptor. Isotopic measurements of sulfate, water, carbonate, and ferrous iron and functional gene analyses of adenosine 5&amp;prime;-phosphosulfate reductase imply that a microbial consortium facilitates a catalytic sulfur cycle. These metabolic pathways result from a limited organic carbon supply because of the absence of contemporary photosynthesis, yielding a subglacial ferrous brine that is anoxic but not sulfidic. Coupled biogeochemical processes below the glacier enable subglacial microbes to grow in extended isolation, demonstrating how analogous organic-starved systems, such as Neoproterozoic oceans, accumulated Fe(II) despite the presence of an active sulfur cycle.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5925</style></issue><work-type><style face="normal" font="default" size="100%">Journal</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Christine M. Foreman</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">G.E. Likens</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Lakes of Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Encyclopedia of Inland Waters volume 2</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2009</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier Press</style></publisher><pub-location><style face="normal" font="default" size="100%">Oxford</style></pub-location><pages><style face="normal" font="default" size="100%">555-566</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Tulaczyk, S</style></author><author><style face="normal" font="default" size="100%">Studinger, M</style></author><author><style face="normal" font="default" size="100%">Kenicutt, M</style></author><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">Christine M. Foreman</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antarctic subglacial water: origin, evolution, and ecology</style></title><secondary-title><style face="normal" font="default" size="100%">Polar Lakes and Rivers: Limnology of Arctic and Antarctic Aquatic Ecosystems</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><publisher><style face="normal" font="default" size="100%">Oxford University Press</style></publisher><pub-location><style face="normal" font="default" size="100%">Oxford</style></pub-location><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">Skidmore, M</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Martyn Tranter</style></author><author><style face="normal" font="default" size="100%">Christine M. Foreman</style></author></authors><tertiary-authors><author><style face="normal" font="default" size="100%">R. Margesin</style></author></tertiary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacteria in Subglacial Environments</style></title><secondary-title><style face="normal" font="default" size="100%">Psychrophiles: from biodiversity to biotechnology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><publisher><style face="normal" font="default" size="100%">Springer Verlag</style></publisher><pub-location><style face="normal" font="default" size="100%">New York</style></pub-location><pages><style face="normal" font="default" size="100%">51-71</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Sawstrom, C</style></author><author><style face="normal" font="default" size="100%">John T. Lisle</style></author><author><style face="normal" font="default" size="100%">Alexandre M. Anesio</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacteriophage in polar inland waters</style></title><secondary-title><style face="normal" font="default" size="100%">Extremophiles</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">/reports/lakes/SawstromEtAl2008Bacteriophage.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">12</style></volume><pages><style face="normal" font="default" size="100%">167-175</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hodson, A</style></author><author><style face="normal" font="default" size="100%">Alexandre M. Anesio</style></author><author><style face="normal" font="default" size="100%">Martyn Tranter</style></author><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">Osborn, M</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author><author><style face="normal" font="default" size="100%">Sattler, B</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Glacial ecosystems</style></title><secondary-title><style face="normal" font="default" size="100%">Ecological Monographs</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Biggie</style></keyword><keyword><style  face="normal" font="default" size="100%">snow ecology</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1890/07-0187.1</style></url></web-urls></urls><edition><style face="normal" font="default" size="100%">1</style></edition><volume><style face="normal" font="default" size="100%">78</style></volume><pages><style face="normal" font="default" size="100%">41-67</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;div&gt;There is now compelling evidence that microbially mediated reactions impart a significant effect upon the dynamics, composition, and abundance of nutrients in glacial melt water. Consequently, we must now consider ice masses as ecosystem habitats in their own right and address their diversity, functional potential, and activity as part of alpine and polar environments. Although such research is already underway, its fragmentary nature provides little basis for developing modern concepts of glacier ecology. This paper therefore provides a much-needed framework for development by reviewing the physical, biogeochemical, and microbiological characteristics of microbial habitats that have been identified within glaciers and ice sheets. Two key glacial ecosystems emerge, one inhabiting the glacier surface (the supraglacial ecosystem) and one at the ice-bed interface (the subglacial ecosystem). The supraglacial ecosystem is characterized by a diverse consortium of microbes (usually bacteria, algae, phytoflagellates, fungi, viruses and occasional rotifers, tardigrades, and diatoms) within the snowpack, supraglacial streams, and melt pools (cryoconite holes). The subglacial system is dominated by aerobic/anaerobic bacteria and most probably viruses in basal ice/till mixtures and subglacial lakes. A third, so-called englacial ecosystem is also described, but it is demonstrated that conditions within glacier ice are sufficient to make metabolic activity and its impact upon nutrient dynamics negligible at the glacier scale.&lt;/div&gt;&lt;div&gt;&amp;nbsp;&lt;/div&gt;&lt;div&gt;Consideration of the surface and internal heat balances of the glacier show that all glacial ecosystems are sensitive to climate change, although at different timescales. Thus, while rapid, melt-driven habitat changes lead to melt-out, resuscitation, and redistribution of microorganisms in many supraglacial ecosystems, much slower climatic and glacial mass-balance processes effect such changes in the subglacial ecosystem. Paradoxically, it is shown that these forces have brought about net refreezing and the onset of cryostasis in the subglacial ecosystems of many Arctic glaciers subject to thinning in recent decades.&lt;/div&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Plankton Dynamics in the McMurdo Dry Valley Lakes During the Transition to Polar Night - A Project Contributing to EBA</style></title><secondary-title><style face="normal" font="default" size="100%">SCAR EBA (Evolution and Biodiversity in the Antarctic) Newsletter, October 2008</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><volume><style face="normal" font="default" size="100%">2</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">3</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jaraula, C</style></author><author><style face="normal" font="default" size="100%">Kenig, Fabien</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">SPME-GCMS study of the natural attenuation of aviation diesel spilled on the perennial ice cover of Lake Fryxell, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Science of the Total Environment</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><volume><style face="normal" font="default" size="100%">407</style></volume><pages><style face="normal" font="default" size="100%">250-262</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Brent C. Christner</style></author><author><style face="normal" font="default" size="100%">John E. Dore</style></author><author><style face="normal" font="default" size="100%">Marian B. Westley</style></author><author><style face="normal" font="default" size="100%">Brian N. Popp</style></author><author><style face="normal" font="default" size="100%">Karen L. Casciotti</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Supersaturated N2O in a perennially ice-covered Antarctic lake: Molecular and stable isotopic evidence for a biogeochemical relict.</style></title><secondary-title><style face="normal" font="default" size="100%">Limnology and Oceanography</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://brent.xner.net/pdf/Priscu_etal2008_ELB-N2O.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">53</style></volume><pages><style face="normal" font="default" size="100%">2439-2450</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">6</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jill A. Mikucki</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterial diversity associated with Blood Falls, A subglacial outflow from the Taylor Glacier, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Applied and Environmental Microbiology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">73</style></volume><pages><style face="normal" font="default" size="100%">4029-4039</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">Ross A. Virginia</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">Diana H. Wall</style></author><author><style face="normal" font="default" size="100%">Daryl L. Moorhead</style></author><author><style face="normal" font="default" size="100%">Peter T. Doran</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeochemical stoichiometry of Antarctic Dry Valley ecosystems</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Biggie</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/2007</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">112</style></volume><pages><style face="normal" font="default" size="100%">G01010+12</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;Among aquatic and terrestrial landscapes of the McMurdo Dry Valleys, Antarctica, ecosystem stoichiometry ranges from values near the Redfield ratios for C:N:P to nutrient concentrations in proportions far above or below ratios necessary to support balanced microbial growth. This polar desert provides an opportunity to evaluate stoichiometric approaches to understand nutrient cycling in an ecosystem where biological diversity and activity are low, and controls over the movement and mass balances of nutrients operate over 10&amp;ndash;10&lt;/span&gt;&lt;span style=&quot;line-height: 0; top: -0.5em; padding-right: 1px; padding-left: 1px; outline: 0px; font-size: 0.688em; position: relative; color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; background: 0px 0px rgb(249, 249, 249);&quot;&gt;6&lt;/span&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: 'Open Sans', Arial, Helvetica, 'Lucida Sans Unicode', sans-serif; font-size: 16px; line-height: 24px; background-color: rgb(249, 249, 249);&quot;&gt;&amp;nbsp;years. The simple organisms (microbial and metazoan) comprising dry valley foodwebs adhere to strict biochemical requirements in the composition of their biomass, and when activated by availability of liquid water, they influence the chemical composition of their environment according to these ratios. Nitrogen and phosphorus varied significantly in terrestrial and aquatic ecosystems occurring on landscape surfaces across a wide range of exposure ages, indicating strong influences of landscape development and geochemistry on nutrient availability. Biota control the elemental ratio of stream waters, while geochemical stoichiometry (e.g., weathering, atmospheric deposition) evidently limits the distribution of soil invertebrates. We present a conceptual model describing transformations across dry valley landscapes facilitated by exchanges of liquid water and biotic processing of dissolved nutrients. We conclude that contemporary ecosystem stoichiometry of Antarctic Dry Valley soils, glaciers, streams, and lakes results from a combination of extant biological processes superimposed on a legacy of landscape processes and previous climates.&lt;/span&gt;&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Christine M. Foreman</style></author><author><style face="normal" font="default" size="100%">Sattler, B</style></author><author><style face="normal" font="default" size="100%">Jill A. Mikucki</style></author><author><style face="normal" font="default" size="100%">Porazinska, D</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Metabolic activity and diversity of cryoconites in the Taylor Valley, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Geophysical Research</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><volume><style face="normal" font="default" size="100%">112</style></volume><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Moore, J</style></author></authors><tertiary-authors><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></tertiary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Microbial Processes in the Moats of Lakes in the Taylor Valley, Antarctica</style></title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><volume><style face="normal" font="default" size="100%">M.S.</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><work-type><style face="normal" font="default" size="100%">masters</style></work-type></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rachael M. Morgan-Kiss</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author><author><style face="normal" font="default" size="100%">Pocock, T</style></author><author><style face="normal" font="default" size="100%">Gudynaite-Savitch, L</style></author><author><style face="normal" font="default" size="100%">Norman P.A. Huner</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Adaptation and acclimation of photosynthetic microorganisms to permanently cold environments</style></title><secondary-title><style face="normal" font="default" size="100%">Microbial and Molecular Biology Review</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Biggie</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">03/2006</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">70</style></volume><pages><style face="normal" font="default" size="100%">222-252</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(64, 56, 56); font-family: 'Lucida Sans Unicode', Arial, 'Lucida Grande', Tahoma, Verdana, Helvetica, sans-serif; font-size: 12.8px; line-height: 19.2px;&quot;&gt;Persistently cold environments constitute one of our world&amp;#39;s largest ecosystems, and microorganisms dominate the biomass and metabolic activity in these extreme environments. The stress of low temperatures on life is exacerbated in organisms that rely on photoautrophic production of organic carbon and energy sources. Phototrophic organisms must coordinate temperature-independent reactions of light absorption and photochemistry with temperature-dependent processes of electron transport and utilization of energy sources through growth and metabolism. Despite this conundrum, phototrophic microorganisms thrive in all cold ecosystems described and (together with chemoautrophs) provide the base of autotrophic production in low-temperature food webs. Psychrophilic (organisms with a requirement for low growth temperatures) and psychrotolerant (organisms tolerant of low growth temperatures) photoautotrophs rely on low-temperature acclimative and adaptive strategies that have been described for other low-temperature-adapted heterotrophic organisms, such as cold-active proteins and maintenance of membrane fluidity. In addition, photoautrophic organisms possess other strategies to balance the absorption of light and the transduction of light energy to stored chemical energy products (NADPH and ATP) with downstream consumption of photosynthetically derived energy products at low temperatures. Lastly, differential adaptive and acclimative mechanisms exist in phototrophic microorganisms residing in low-temperature environments that are exposed to constant low-light environments versus high-light- and high-UV-exposed phototrophic assemblages.&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">John C. Priscu</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">D.M. Bergstrom</style></author><author><style face="normal" font="default" size="100%">Peter Convey</style></author><author><style face="normal" font="default" size="100%">A.H.L. 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