<?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%">Varliero, Gilda</style></author><author><style face="normal" font="default" size="100%">Lebre, Pedro H.</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">Steven L. Chown</style></author><author><style face="normal" font="default" size="100%">Peter Convey</style></author><author><style face="normal" font="default" size="100%">Dennis, Paul G.</style></author><author><style face="normal" font="default" size="100%">Fan, Dandan</style></author><author><style face="normal" font="default" size="100%">Ferrari, Belinda</style></author><author><style face="normal" font="default" size="100%">Frey, Beat</style></author><author><style face="normal" font="default" size="100%">Hogg, Ian D.</style></author><author><style face="normal" font="default" size="100%">Hopkins, David W.</style></author><author><style face="normal" font="default" size="100%">Kong, Weidong</style></author><author><style face="normal" font="default" size="100%">Makhalanyane, Thulani</style></author><author><style face="normal" font="default" size="100%">Matcher, Gwynneth</style></author><author><style face="normal" font="default" size="100%">Newsham, Kevin K.</style></author><author><style face="normal" font="default" size="100%">Stevens, Mark I.</style></author><author><style face="normal" font="default" size="100%">Weigh, Katherine V.</style></author><author><style face="normal" font="default" size="100%">Cowan, Don A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeographic survey of soil bacterial communities across Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Microbiome</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antarctic Conservation Biogeographic Regions (ACBRs)</style></keyword><keyword><style  face="normal" font="default" size="100%">Antarctic soil microbiome</style></keyword><keyword><style  face="normal" font="default" size="100%">bioclimatic variables</style></keyword><keyword><style  face="normal" font="default" size="100%">biogeography</style></keyword><keyword><style  face="normal" font="default" size="100%">microbial diversity</style></keyword><keyword><style  face="normal" font="default" size="100%">regionalization</style></keyword><keyword><style  face="normal" font="default" size="100%">soils</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%">01/2024</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-023-01719-3</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">12</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Antarctica and its unique biodiversity are increasingly at risk from the effects of global climate change and other human influences. A significant recent element underpinning strategies for Antarctic conservation has been the development of a system of Antarctic Conservation Biogeographic Regions (ACBRs). The datasets supporting this classification are, however, dominated by eukaryotic taxa, with contributions from the bacterial domain restricted to Actinomycetota and Cyanobacteriota. Nevertheless, the ice-free areas of the Antarctic continent and the sub-Antarctic islands are dominated in terms of diversity by bacteria. Our study aims to generate a comprehensive phylogenetic dataset of Antarctic bacteria with wide geographical coverage on the continent and sub-Antarctic islands, to investigate whether bacterial diversity and distribution is reflected in the current ACBRs.&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%">Garza-Girón, Ricardo</style></author><author><style face="normal" font="default" size="100%">Tulaczyk, Slawek M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Brief communication: Significant biases in ERA5 output for the McMurdo Dry Valleys region, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">The Cryosphere</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2024</style></year><pub-dates><date><style  face="normal" font="default" size="100%">03/2024</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://tc.copernicus.org/articles/18/1207/2024</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">18</style></volume><pages><style face="normal" font="default" size="100%">1207 - 1213</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 ERA5 climate reanalysis dataset plays an important role in applications such as monitoring and modeling climate system changes in polar regions, so the calibration of the reanalysis to ground observations is of great relevance. Here, we compare the 2 m air temperature time series of the ERA5 reanalysis and the near-surface bias-corrected reanalysis to the near-ground air temperature measured at 17 automatic weather stations (AWSs) in the McMurdo Dry Valleys, Antarctica. We find that the reanalysis data have biases that change with the season of the year and do not clearly correlate with elevation. Our results show that future work should rely on secondary observations to calibrate when using the ERA5 reanalysis in polar regions.&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%">Alagona, Peter</style></author><author><style face="normal" font="default" size="100%">Carey, Mark</style></author><author><style face="normal" font="default" size="100%">Howkins, Adrian</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Better together? The values, obstacles, opportunities, and prospects for collaborative research in environmental history</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental History</style></secondary-title><short-title><style face="normal" font="default" size="100%">Environmental History</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2023</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.journals.uchicago.edu/doi/full/10.1086/723784</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">28</style></volume><pages><style face="normal" font="default" size="100%">269 - 299</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Environmental historians have long argued for the value of collaborative research, many have called for more of it, and some have experimented with new forms of teamwork. Yet data gathered from three prominent journals&amp;mdash;&lt;i&gt;Environmental History&lt;/i&gt;, &lt;i&gt;Environment and History&lt;/i&gt;, and the &lt;i&gt;Journal of Historical Geography&lt;/i&gt;&amp;mdash;show that, over the fifteen-year period from 2006 through 2020, coauthorship on published research remained remarkably rare, with no discernible trend over time. Why do environmental historians still collaborate so infrequently on published research? What are the causes and consequences of this failure to work together? And how can we help better fulfill long-standing calls in our field for a more collaborative research culture? This essay answers these questions, and it offers practical remedies for fostering a culture of greater collaboration in environmental history.&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%">Gemma E. Collins</style></author><author><style face="normal" font="default" size="100%">Young, Monica R.</style></author><author><style face="normal" font="default" size="100%">Peter Convey</style></author><author><style face="normal" font="default" size="100%">Steven L. Chown</style></author><author><style face="normal" font="default" size="100%">Craig S Cary</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">Diana H. Wall</style></author><author><style face="normal" font="default" size="100%">Hogg, Ian D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeography and genetic diversity of terrestrial mites in the Ross Sea region, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Genes</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Acari</style></keyword><keyword><style  face="normal" font="default" size="100%">Antarctic conservation</style></keyword><keyword><style  face="normal" font="default" size="100%">DNA barcoding</style></keyword><keyword><style  face="normal" font="default" size="100%">geographic isolation</style></keyword><keyword><style  face="normal" font="default" size="100%">speciation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">03/2023</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.mdpi.com/2073-4425/14/3/606</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">14</style></volume><pages><style face="normal" font="default" size="100%">606</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Free-living terrestrial mites (Acari) have persisted through numerous glacial cycles in Antarctica. Very little is known, however, of their genetic diversity and distribution, particularly within the Ross Sea region. To redress this gap, we sampled mites throughout the Ross Sea region, East Antarctica, including Victoria Land and the Queen Maud Mountains (QMM), covering a latitudinal range of 72&amp;ndash;85 &amp;deg;S, as well as Lauft Island near Mt. Siple (73 &amp;deg;S) in West Antarctica and Macquarie Island (54 &amp;deg;S) in the sub-Antarctic. We assessed genetic diversity using mitochondrial cytochrome &lt;i&gt;c&lt;/i&gt; oxidase subunit I gene sequences (COI-5P DNA barcode region), and also morphologically identified voucher specimens. We obtained 130 sequences representing four genera: &lt;i&gt;Nanorchestes&lt;/i&gt; (n = 30 sequences), &lt;i&gt;Stereotydeus&lt;/i&gt; (n = 46), &lt;i&gt;Coccorhagidia&lt;/i&gt; (n = 18) and &lt;i&gt;Eupodes&lt;/i&gt; (n = 36). Tree-based analyses (maximum likelihood) revealed 13 genetic clusters, representing as many as 23 putative species indicated by barcode index numbers (BINs) from the Barcode of Life Datasystems (BOLD) database. We found evidence for geographically-isolated cryptic species, e.g., within &lt;i&gt;Stereotydeus belli&lt;/i&gt; and &lt;i&gt;S. punctatus&lt;/i&gt;, as well as unique genetic groups occurring in sympatry (e.g., &lt;i&gt;Nanorchestes&lt;/i&gt; spp. in QMM). Collectively, these data confirm high genetic divergence as a consequence of geographic isolation over evolutionary timescales. From a conservation perspective, additional targeted sampling of understudied areas in the Ross Sea region should be prioritised, as further diversity is likely to be found in these short-range endemic mites.&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%">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%">Schulte, Nicholas O.</style></author><author><style face="normal" font="default" size="100%">Khan, Alia L.</style></author><author><style face="normal" font="default" size="100%">Smith, Emma W.</style></author><author><style face="normal" font="default" size="100%">Zoumplis, Angela</style></author><author><style face="normal" font="default" size="100%">Kaul, Drishti</style></author><author><style face="normal" font="default" size="100%">Allen, Andrew E.</style></author><author><style face="normal" font="default" size="100%">Adams, Byron J.</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%">Blowin’ in the wind: Dispersal, structure, and metacommunity dynamics of aeolian diatoms in the McMurdo Sound region, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Phycology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Journal of Phycology</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">18S rRNA</style></keyword><keyword><style  face="normal" font="default" size="100%">airborne</style></keyword><keyword><style  face="normal" font="default" size="100%">algae</style></keyword><keyword><style  face="normal" font="default" size="100%">assembly</style></keyword><keyword><style  face="normal" font="default" size="100%">Bacillariophyta</style></keyword><keyword><style  face="normal" font="default" size="100%">biogeography</style></keyword><keyword><style  face="normal" font="default" size="100%">connectivity</style></keyword><keyword><style  face="normal" font="default" size="100%">high-throughput sequencing</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%">02/2022</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://onlinelibrary.wiley.com/doi/10.1111/jpy.13223</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">58</style></volume><pages><style face="normal" font="default" size="100%">36-54</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Diatom metacommunities are structured by environmental, historical, and spatial factors that are often attributed to organism dispersal. In the McMurdo Sound region (MSR) of Antarctica, wind connects aquatic habitats through delivery of inorganic and organic matter. We evaluated the dispersal of diatoms in aeolian material and its relation to the regional diatom metacommunity using light microscopy and 18S rRNA high-throughput sequencing. The concentration of diatoms ranged from 0 to 8.76 * 10&lt;sup&gt;6&lt;/sup&gt; valves &amp;middot; g&lt;sup&gt;-1&lt;/sup&gt; dry aeolian material. Up to 15% of whole cells contained visible protoplasm, indicating that up to 3.43 * 10&lt;sup&gt;4&lt;/sup&gt; potentially viable individuals could be dispersed in a year to a single 2 cm&lt;sup&gt;2&lt;/sup&gt;&amp;nbsp;site. Diatom DNA and RNA was detected at each site, reinforcing the likelihood that we observed dispersal of viable diatoms. Of the 50 known morphospecies in the MSR, 72% were identified from aeolian material using microscopy. Aeolian community composition varied primarily by site. Meanwhile, each aeolian community was comprised of morphospecies found in aquatic communities from the same lake basin. These results suggest that aeolian diatom dispersal in the MSR is spatially structured, is predominantly local, and connects local aquatic habitats via a shared species pool. Nonetheless, aeolian community structure was distinct from that of aquatic communities, indicating that intrahabitat dispersal and environmental filtering also underlie diatom metacommunity dynamics. The present study confirms that a large number of diatoms are passively dispersed by wind across a landscape characterized by aeolian processes, integrating the regional flora and contributing to metacommunity structure and landscape connectivity.&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%">Charles K. Lee</style></author><author><style face="normal" font="default" size="100%">Laughlin, Daniel C.</style></author><author><style face="normal" font="default" size="100%">Bottos, Eric M.</style></author><author><style face="normal" font="default" size="100%">Caruso, Tancredi</style></author><author><style face="normal" font="default" size="100%">Joy, Kurt</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">Brabyn, Lars</style></author><author><style face="normal" font="default" size="100%">Uffe N. Nielsen</style></author><author><style face="normal" font="default" size="100%">Byron Adams</style></author><author><style face="normal" font="default" size="100%">Diana H. Wall</style></author><author><style face="normal" font="default" size="100%">D. W. Hopkins</style></author><author><style face="normal" font="default" size="100%">Pointing, Steve B.</style></author><author><style face="normal" font="default" size="100%">McDonald, Ian R.</style></author><author><style face="normal" font="default" size="100%">Cowan, Don A.</style></author><author><style face="normal" font="default" size="100%">Banks, Jonathan C.</style></author><author><style face="normal" font="default" size="100%">Stichbury, Glen A.</style></author><author><style face="normal" font="default" size="100%">Jones, Irfon</style></author><author><style face="normal" font="default" size="100%">Zawar-Reza, Peyman</style></author><author><style face="normal" font="default" size="100%">Katurji, Marwan</style></author><author><style face="normal" font="default" size="100%">Hogg, Ian D.</style></author><author><style face="normal" font="default" size="100%">Sparrow, Ashley D.</style></author><author><style face="normal" font="default" size="100%">Storey, Bryan C.</style></author><author><style face="normal" font="default" size="100%">Allan Green, T. G.</style></author><author><style face="normal" font="default" size="100%">Craig S Cary</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biotic interactions are an unexpected yet critical control on the complexity of an abiotically driven polar ecosystem</style></title><secondary-title><style face="normal" font="default" size="100%">Communications Biology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Commun Biol</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://www.nature.com/articles/s42003-018-0274-5</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">2</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Abiotic and biotic factors control ecosystem biodiversity, but their relative contributions remain unclear. The ultraoligotrophic ecosystem of the Antarctic Dry Valleys, a simple yet highly heterogeneous ecosystem, is a natural laboratory well-suited for resolving the abiotic and biotic controls of community structure. We undertook a multidisciplinary investigation to capture ecologically relevant biotic and abiotic attributes of more than 500 sites in the Dry Valleys, encompassing observed landscape heterogeneities across more than 200 km&lt;sup&gt;2&lt;/sup&gt;. Using richness of autotrophic and heterotrophic taxa as a proxy for functional complexity, we linked measured variables in a parsimonious yet comprehensive structural equation model that explained significant variations in biological complexity and identified landscape-scale and fine-scale abiotic factors as the primary drivers of diversity. However, the inclusion of linkages among functional groups was essential for constructing the best-fitting model. Our findings support the notion that biotic interactions make crucial contributions even in an extremely simple ecosystem.&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%">Shaw, E. Ashley</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%">Biotic interactions in experimental Antarctic soil microcosms vary with abiotic stress</style></title><secondary-title><style face="normal" font="default" size="100%">Soil Systems</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">bacteria</style></keyword><keyword><style  face="normal" font="default" size="100%">biological interactions</style></keyword><keyword><style  face="normal" font="default" size="100%">desert</style></keyword><keyword><style  face="normal" font="default" size="100%">nematode</style></keyword><keyword><style  face="normal" font="default" size="100%">polar</style></keyword><keyword><style  face="normal" font="default" size="100%">soil communities</style></keyword><keyword><style  face="normal" font="default" size="100%">top-down effects</style></keyword><keyword><style  face="normal" font="default" size="100%">trophic interactions</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%">08/2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.mdpi.com/2571-8789/3/3/57</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">3</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Biotic interactions structure ecological communities but abiotic factors affect the strength of these relationships. These interactions are difficult to study in soils due to their vast biodiversity and the many environmental factors that affect soil species. The McMurdo Dry Valleys (MDV), Antarctica, are relatively simple soil ecosystems compared to temperate soils, making them an excellent study system for the trophic relationships of soil. Soil microbes and relatively few species of nematodes, rotifers, tardigrades, springtails, and mites are patchily distributed across the cold, dry landscape, which lacks vascular plants and terrestrial vertebrates. However, glacier and permafrost melt are expected to cause shifts in soil moisture and solutes across this ecosystem. To test how increased moisture and salinity affect soil invertebrates and their biotic interactions, we established a laboratory microcosm experiment (4 community &amp;times; 2 moisture &amp;times; 2 salinity treatments). Community treatments were: (1) Bacteria only (control), (2) Scottnema (&lt;em&gt;S. lindsayae&lt;/em&gt; + bacteria), (3) Eudorylaimus (&lt;em&gt;E. antarcticus&lt;/em&gt; + bacteria), and (4) Mixed (&lt;em&gt;S. lindsayae&lt;/em&gt; + &lt;em&gt;E. antarcticus&lt;/em&gt; + bacteria). Salinity and moisture treatments were control and high. High moisture reduced &lt;em&gt;S. lindsayae&lt;/em&gt; adults, while high salinity reduced the total &lt;em&gt;S. lindsayae&lt;/em&gt; population. We found that &lt;em&gt;S. lindsayae&lt;/em&gt; exerted top-down control over soil bacteria populations, but this effect was dependent on salinity treatment. In the high salinity treatment, bacteria were released from top-down pressure as &lt;em&gt;S. lindsayae&lt;/em&gt; declined. Ours was the first study to empirically demonstrate, although in lab microcosm conditions, top-down control in the MDV soil food web.&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%">Saelens, Elsa D.</style></author><author><style face="normal" font="default" size="100%">Christopher B. Gardner</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">Sue Welch</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%">Barium and barite dynamics in Antarctic streams</style></title><secondary-title><style face="normal" font="default" size="100%">Geology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">08/2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://pubs.geoscienceworld.org/gsa/geology/article/545184/Barium-and-barite-dynamics-in-Antarctic-streams</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">811 - 814</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Most natural waters are undersaturated with respect to barite (BaSO4), and while much work has focused on the processes of microbially mediated barite precipitation in undersaturated solutions, particularly in marine environments, little documentation exists on the changes in barite saturation in stream waters. We examined ephemeral glacial meltwater streams in the McMurdo Dry Valleys, Antarctica, that undergo large variations in streamflow and temperature on both a diel and seasonal basis. We measured dissolved Ba in stream water in downstream transects and on a diel cycle, total Ba in stream sediments, algal mats, and lake sediments. Ba concentrations decreased downstream in all four transects, and mineral saturation modeling indicates these waters go from supersaturated to undersaturated with respect to barite in very short distances. Ba is concentrated in stream benthic algal mats at a factor less than observed in marine systems. Both seasonal and diel changes in stream water temperature affect the solubility of barite near glacial sources. Our work shows that both changing stream temperature and the presence of algal materials likely play significant roles in controlling Ba concentrations in polar streams.&lt;/p&gt;</style></abstract><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%">Heindel, Ruth C</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Sue Welch</style></author><author><style face="normal" font="default" size="100%">Spickard, Angela M</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%">Biogeochemical weathering of soil apatite grains in the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Geoderma</style></secondary-title><short-title><style face="normal" font="default" size="100%">Geoderma</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%">01/2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S0016706117320694</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">320</style></volume><pages><style face="normal" font="default" size="100%">136-145</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 biogeochemical weathering of the mineral apatite links the lithosphere to the biosphere by releasing the essential nutrient phosphorus (P) into the soil ecosystem. In Taylor Valley, Antarctica, faster rates of apatite weathering may be responsible for the higher concentrations of bioavailable soil P that exist in the Fryxell Basin as compared to the Bonney Basin. In this study, we use scanning electron microscopy to quantify the morphology and surface etching of individual apatite grains to determine whether the degree of apatite weathering differs between the Fryxell and Bonney Basins as well as saturated and dry soil sediments. We show that apatite grains from the Fryxell Basin are rounder, have fewer intact crystal faces, and are more chemically etched than grains from the Bonney Basin. In the Bonney Basin, apatite grains from dry soils show few signs of chemical dissolution, suggesting that soil moisture is a stronger control on the rate of apatite weathering in the Bonney Basin than in the Fryxell Basin. In addition, etch-pit morphologies in the Bonney Basin are more clearly controlled by the hexagonal crystal structure of apatite, while in the Fryxell Basin, etch pits demonstrate a wide range of morphologies without clear crystallographic control. Higher rates of apatite weathering in the Fryxell Basin may be due to the legacy of the physical abrasion of apatite grains during transport by a warm-based ice sheet, as well as the higher levels of precipitation and soil moisture closer to the coast. Our grain-scale approach provides a new perspective on P cycling in the McMurdo Dry Valleys and has implications for apatite weathering and P dynamics in the early stages of soil development.&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%">Mass, Alex Q.</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%">Biogeochemistry, contaminant transport, and atmospheric exchange in glacial cryoconite meltwater of the McMurdo Dry Valleys, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Department of Civil, Environmental, and Architectural Engineering</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antarctica</style></keyword><keyword><style  face="normal" font="default" size="100%">applied sciences</style></keyword><keyword><style  face="normal" font="default" size="100%">contaminant transport</style></keyword><keyword><style  face="normal" font="default" size="100%">cryoconite</style></keyword><keyword><style  face="normal" font="default" size="100%">earth sciences</style></keyword><keyword><style  face="normal" font="default" size="100%">glacier</style></keyword><keyword><style  face="normal" font="default" size="100%">hydrology</style></keyword><keyword><style  face="normal" font="default" size="100%">melt</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%">2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://search.proquest.com/docview/2048314678</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">University of Colorado</style></publisher><pub-location><style face="normal" font="default" size="100%">Boulder, CO</style></pub-location><volume><style face="normal" font="default" size="100%">Ph.D.</style></volume><pages><style face="normal" font="default" size="100%">245</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Polar regions serve as a global sink for many forms of semi-volatile pollution emitted from low- or midlatitudes of the populated world. This study examined the longrange atmospheric transport, fate, and phase partitioning of semi-volatile organic contaminants from air masses into meltwater and aeolian sediment on six glaciers in the McMurdo Dry Valleys of Antarctica. A novel low-cost, field-portable instrument was developed for the in-situ solid-phase extraction of trace contaminants in extreme environmental conditions without access to electricity or traditional laboratory facilities. Beyond polar research, this equipment is applicable for rapid field extraction and stabilization of samples assessing air and water quality after natural disasters. This is the first published study to identify the presence of anthropogenic perfluorinated compounds in the Transantarctic Mountain region and indicates a longer range of poleward contaminant transport than prior estimates in the Southern Hemisphere. Additional research examined the biochemistry and climatic variability of open and sealed cryoconite holes on glacial surfaces throughout the initial melt, equilibrium, and refreezing periods in 2013&amp;ndash;2015. High solute concentrations relative to glacial ice indicate that the pools can remain isolated from hydrologic connectivity for more than a decade. Microbial carbon cycling in pools enclosed by ice led to atmospheric disequilibrium and extreme pH. Analysis of unique air, liquid, and ice stratification in cryoconite holes revealed vertical patterns representing a highly accurate, multi-year record of past weather conditions sensitive enough to identify individual dates. This research identifies fluctuations in atmospheric contaminant transport, specific timeframes for deposition events, and may be used in back-trajectory models to help identify the source and variability of semi-volatile emissions in the Southern hemisphere.&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%">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>32</ref-type><contributors><authors><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%">Biogeochemical processes in Antarctic aquatic environments: Linkages and limitations</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://search.proquest.com/openview/9118336399cac113f488d77fb07bce26/1?pq-origsite=gscholar&amp;cbl=18750&amp;diss=y</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Montana State University</style></publisher><volume><style face="normal" font="default" size="100%">Ph.D.</style></volume><pages><style face="normal" font="default" size="100%">228</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 research presented in this dissertation focused on microbially-mediated biogeochemical processes and microbial ecology in Antarctic lakes and seawater. The major objective of my research was to examine the impact of environmentally imposed energetic constraints on nutrient cycling in mirobially-dominated systems. I used three ice-covered aquatic environments as natural laboratories for my investigations. The permanently ice-covered lakes of the McMurdo Dry Valleys (MCM) are located in Victoria Land, East Antarctica. The MCM have been studied intensively as part of the McMurdo Long Term Ecological Research Project since 1993. My work built on the extensive MCM dataset via high-throughput DNA sequencing to examine microbial communities from all three domains of life during the transition to winter, and by quantifying rates of dark inorganic carbon-fixation. This worked showed the importance of flexible metabolisms in the microbial ecosystems of the MCM lakes. The ocean beneath the McMurdo Ice Shelf (MIS) is the gateway between the Ross Sea and the dark ocean of the Ross Ice Shelf cavity. The area supports a biological carbon pump that is important in ocean biogeochemistry. Ice shelves around Antarctica are under threat of collapse, but little is known about the ecosystems beneath them. My work used a combination of biogeochemical measurements and assessment of microbial community structure to characterize the ecosystem beneath the MIS and its connections to the open ocean. The data showed the importance of nutrients advected from open water to the MIS cavity and projected an organic carbon deficit farther from the ice shelf edge. Subglacial Lake Whillans lies 800 m beneath the surface of the West Antarctic Ice Sheet near the end of a hydrological continuum that terminates in the ocean beneath the Ross Ice Shelf. Primarily through the use of biogeochemical rate measurements and determinations of organic matter quantity and quality, this work established the presence of an active microbial ecosystem in the subglacial lake, and estimated the annual subglacial flux of carbon and nutrients to the ocean under the ice shelf. Together, these projects show the importance of microbial activity in regional biogeochemical processes and of metabolic flexibility under energy-limited conditions.&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%">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%">Kevin M. Geyer</style></author><author><style face="normal" font="default" size="100%">Adam E. Altrichter</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</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></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterial community composition of divergent soil habitats from a polar desert.</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%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">08/2014</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">89</style></volume><pages><style face="normal" font="default" size="100%">490-494</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Edaphic factors such as pH, organic matter, and salinity are often the most significant drivers of diversity patterns in soil bacterial communities. Desert ecosystems in particular are model locations for examining such relationships as food web complexity is low and the soil environment is biogeochemically heterogeneous. Here, we present the findings from a 16S rRNA gene sequencing approach used to observe the differences in diversity and community composition among three divergent soil habitats of the McMurdo Dry Valleys, Antarctica. Results show that alpha diversity is significantly lowered in high pH soils, which contain higher proportions of the phyla Acidobacteria and Actinobacteria, while mesic soils with higher soil organic carbon (and ammonium) content contain high proportions of Nitrospira, a nitrite-oxidizing bacteria. Taxonomic community resolution also had a significant impact on our conclusions, as pH was the primary predictor of phylum-level diversity, while moisture was the most significant predictor of diversity at the genus level. Predictive power also increased with increasing taxonomic resolution, suggesting a potential increase in nic</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><work-type><style face="normal" font="default" size="100%">Short Communication</style></work-type><section><style face="normal" font="default" size="100%">490</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%">Leslie, D.L.</style></author><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Warner, Nathaniel</style></author><author><style face="normal" font="default" size="100%">Vengosh, Avner</style></author><author><style face="normal" font="default" size="100%">Olesik, J</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">Deuerling, Kelly</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Boron isotopic geochemistry of the McMurdo Dry Valley lakes, Antarctica</style></title><secondary-title><style face="normal" font="default" size="100%">Chemical Geology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Chemical Geology</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%">10/2014</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S000925411400391Xhttp://api.elsevier.com/content/article/PII:S000925411400391X?httpAccept=text/xmlhttp://api.elsevier.com/content/article/PII:S000925411400391X?httpAccept=text/plain</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">386</style></volume><pages><style face="normal" font="default" size="100%">152 - 164</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&amp;nbsp;&lt;/p&gt;&lt;div class=&quot;sgfNoTitleBar sgfNoGadgetBorder svDoNotLink ui-sortable&quot; id=&quot;SD_BA1P&quot; style=&quot;font-size: 16px; font-family: Arial, Helvetica, 'Lucida Sans Unicode', 'Microsoft Sans Serif', 'Segoe UI Symbol', STIXGeneral, 'Cambria Math', 'Arial Unicode MS', sans-serif; color: rgb(46, 46, 46); line-height: 23.6800003051758px;&quot;&gt;&lt;div class=&quot;containerApplOver invisible&quot; id=&quot;SD_BA1P_298231&quot; style=&quot;margin-top: 5px; padding-right: 2px; padding-left: 2px; visibility: hidden; position: absolute;&quot;&gt;&lt;div class=&quot;containerAppDetails &quot; id=&quot;maincontremote_iframe_0&quot; style=&quot;border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-style: none; border-color: rgb(227, 227, 227); width: 300px; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;&quot;&gt;&amp;lt;iframe id=&amp;quot;remote_iframe_0&amp;quot; name=&amp;quot;remote_iframe_0&amp;quot; src=&amp;quot;http://sciverse-shindig.elsevier.com/gadgets/ifr?container=default&amp;amp;mid=0&amp;amp;nocache=1&amp;amp;country=ALL&amp;amp;lang=ALL&amp;amp;view=profile&amp;amp;parent=http%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS000925411400391X%3Fnp%3Dy%3A%2F%2Fwww.sciencedirect.com&amp;amp;up_SiteCatalyst=http%3A%2F%2Fcdn.els-cdn.com%2Fgadgets%2Fprod%2Fjs%2Fv3%2Fs_code_1.js&amp;amp;up_Beacon=http%3A%2F%2Fcdn.els-cdn.com%2Fgadgets%2Fprod%2Fjs%2Fv1%2Fs_beacon.js&amp;amp;up_doi=10.1016%252Fj.chemgeo.2014.08.016&amp;amp;up_gadgetId=298231&amp;amp;st=john.doe:john.doe:appid:cont:url:0:default&amp;amp;url=http%3A%2F%2Fae-content.elsevier.com%2Fsvapp%2F298231%2Fprod%2Fprivate%2Fspec.xml#rpctoken=300295446&amp;quot; &amp;quot;=&amp;quot;&amp;quot; frameborder=&amp;quot;no&amp;quot; scrolling=&amp;quot;auto&amp;quot; height=&amp;quot;&amp;quot; width=&amp;quot;100%&amp;quot; style=&amp;quot;height: 0px;&amp;quot;&amp;gt;&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;&lt;div class=&quot;abstract svAbstract &quot; data-etype=&quot;ab&quot; style=&quot;font-size: 16px; font-family: Arial, Helvetica, 'Lucida Sans Unicode', 'Microsoft Sans Serif', 'Segoe UI Symbol', STIXGeneral, 'Cambria Math', 'Arial Unicode MS', sans-serif; color: rgb(46, 46, 46); line-height: 23.6800003051758px;&quot;&gt;&lt;p id=&quot;sp0005&quot; style=&quot;margin-top: 0px; margin-bottom: 9px; word-spacing: -0.15ex;&quot;&gt;The geochemistry of boron was investigated in the ice-covered lakes and glacier meltwater streams within Taylor and Wright Valley of the McMurdo Dry Valleys (MCM), Antarctica, in order to achieve a greater understanding of the source of boron to these aquatic systems and how in-lake processes control boron concentration. Selected lake depths (surface and bottom water) and streams were analyzed for boron geochemistry. Boron stable isotope values in these waters span the range of +&amp;nbsp;12.3&amp;permil; to +&amp;nbsp;51.4&amp;permil;, which corresponds to the variations from glacier meltwater streams to the hypolimnion of a highly evaporated hypersaline lake. The data demonstrate that the major sources of B to the aquatic system are via terrestrial chemical weathering of aluminosilicates within the stream channels, and a marine source, either currently being introduced by marine-derived aerosols or in the form of ancient seawater. Lakes Fryxell, Hoare, and upper waters of Lake Joyce, which experience more terrestrial influence of aluminosilicate chemical weathering via glacial meltwater streams, display a mixture of these two major sources, while the source of B in the bottom waters of Lake Joyce appears to be primarily of marine origin. Lakes Bonney and Vanda and the Blood Falls brine have a marine-like source whose δ&lt;sup style=&quot;font-size: 0.75em; line-height: 0;&quot;&gt;11&lt;/sup&gt;B values have become more positive by mineral precipitation and/or adsorption. Don Juan Pond displays a terrestrial aluminosilicate influence of a marine-like source. These hypersaline lake waters from Antarctica are similar in δ&lt;sup style=&quot;font-size: 0.75em; line-height: 0;&quot;&gt;11&lt;/sup&gt;B to other hypersaline lake waters globally, suggesting that similar processes control their B geochemistry.&lt;/p&gt;&lt;div&gt;&amp;nbsp;&lt;/div&gt;&lt;/div&gt;&lt;p&gt;&amp;nbsp;&lt;/p&gt;</style></abstract><section><style face="normal" font="default" size="100%">152</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%">Lee F. Stanish</style></author><author><style face="normal" font="default" size="100%">Sean P. O'Neill</style></author><author><style face="normal" font="default" size="100%">Antonio González</style></author><author><style face="normal" font="default" size="100%">Teresa M. Legg</style></author><author><style face="normal" font="default" size="100%">Joseph Knelman</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author><author><style face="normal" font="default" size="100%">Sarah A. Spaulding</style></author><author><style face="normal" font="default" size="100%">Diana R. Nemergut</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacteria and diatom co-occurrence patterns in microbial mats from polar desert streams</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%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/j.1462-2920.2012.02872.x/abstract</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%">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%">Lydia H. Zeglin</style></author><author><style face="normal" font="default" size="100%">Clifford N. Dahm</style></author><author><style face="normal" font="default" size="100%">John E. Barrett</style></author><author><style face="normal" font="default" size="100%">Michael N. Gooseff</style></author><author><style face="normal" font="default" size="100%">Shannon K. Fitpatrick</style></author><author><style face="normal" font="default" size="100%">Cristina D. Takacs-Vesbach</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterial Community Structure Along Moisture Gradients in the Parafluvial Sediments of Two Ephemeral Desert Streams</style></title><secondary-title><style face="normal" font="default" size="100%">Microbial Ecology</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%">4/2011</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/content/r83j53334v5n505w/</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">61</style></volume><pages><style face="normal" font="default" size="100%">543 - 556</style></pages><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>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>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Martyn Tranter</style></author><author><style face="normal" font="default" size="100%">Bagshaw, Elizabeth</style></author><author><style face="normal" font="default" size="100%">Andrew G Fountain</style></author><author><style face="normal" font="default" size="100%">Forman, C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The biogeochemistry and hydrology of Dry Valley glaciers: is there life on Martian ice now?</style></title><secondary-title><style face="normal" font="default" size="100%">Life in Antarctic Deserts and other Cold Dry Environments</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><publisher><style face="normal" font="default" size="100%">Cambridge University Press</style></publisher><pub-location><style face="normal" font="default" size="100%">Cambridge</style></pub-location><pages><style face="normal" font="default" size="100%">195-220</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%">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%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Finlay, J</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Warwick F. Vincent</style></author><author><style face="normal" font="default" size="100%">Johanna Laybourn-Parry</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeochemical processes in high-latitude lakes and rivers</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>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Bagshaw, Elizabeth</style></author></authors><tertiary-authors><author><style face="normal" font="default" size="100%">Martyn Tranter</style></author></tertiary-authors></contributors><titles><title><style face="normal" font="default" size="100%">The Biogeochemistry of Cryoconite Holes on Glaciers in Taylor Valley, Antarctica</style></title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><publisher><style face="normal" font="default" size="100%">University of Bristol, UK</style></publisher><language><style face="normal" font="default" size="100%">eng</style></language><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%">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%">Bagshaw, Elizabeth</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%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">Hassan J. Basagic</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%">The biogeochemical evolution of cryoconite holes on glaciers in 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%">113</style></volume><pages><style face="normal" font="default" size="100%">G04S35</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>5</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></authors><secondary-authors><author><style face="normal" font="default" size="100%">B. Riffenburgh</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Biogeochemistry, terrestrial</style></title><secondary-title><style face="normal" font="default" size="100%">Encyclopedia of the Antarctic  Vol 1</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><publisher><style face="normal" font="default" size="100%">Routledge Press</style></publisher><pub-location><style face="normal" font="default" size="100%">New York</style></pub-location><volume><style face="normal" font="default" size="100%">1</style></volume><pages><style face="normal" font="default" size="100%">154-155</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%">Hogg, I</style></author><author><style face="normal" font="default" size="100%">Diana H. 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