@article {4176,
	title = {Inorganic carbon fixation in ice-covered lakes of the McMurdo Dry Valleys},
	journal = {Antarctic Science},
	volume = {72},
	year = {2019},
	month = {04/2019},
	abstract = {<p>Inorganic carbon fixation, usually mediated by photosynthetic microorganisms, is considered to form the base of the food chain in aquatic ecosystems. In high-latitude lakes, lack of sunlight owing to seasonal solar radiation limits the activity of photosynthetic plankton during the polar winter, causing respiration-driven demand for carbon to exceed supply. Here, we show that inorganic carbon fixation in the dark, driven by organisms that gain energy from chemical reactions rather than sunlight (chemolithoautotrophs), provides a significant influx of fixed carbon to two permanently ice-covered lakes (Fryxell and East Bonney). Fryxell, which has higher biomass per unit volume of water, had higher rates of inorganic dark carbon fixation by chemolithoautotrophs than East Bonney (trophogenic zone average 1.0 \&micro;g C l<sup>\&minus;1</sup> d<sup>\&minus;1\&nbsp;</sup>vs 0.08 \&micro;g C l<sup>\&minus;1</sup> d<sup>\&minus;1</sup>, respectively). This contribution from dark carbon fixation was partly due to the activity of ammonia oxidizers, which are present in both lakes. Despite the potential importance of new carbon input by chemolithoautotrophic activity, both lakes remain net heterotrophic, with respiratory demand for carbon exceeding supply. Dark carbon fixation increased the ratio of new carbon supply to respiratory demand from 0.16 to 0.47 in Fryxell, and from 0.14 to 0.22 in East Bonney.</p>},
	keywords = {LTER-MCM, ammonia oxidation, carbon budget, chemoautotrophy, chemolithoautotrophy},
	issn = {0954-1020},
	doi = {10.1017/S0954102019000075},
	url = {https://www.cambridge.org/core/journals/antarctic-science/article/inorganic-carbon-fixation-in-icecovered-lakes-of-the-mcmurdo-dry-valleys/4B5CA9E91C85B307EFDA69F8D7B5BFD9},
	author = {Trista J. Vick-Majors and John C. Priscu}
}
@article {4102,
	title = {The Impact of a Large-Scale Climate Event on Antarctic Ecosystem Processes},
	journal = {BioScience},
	volume = {66},
	year = {2016},
	month = {10/2016},
	pages = {848 - 863},
	abstract = {<p>Extreme climate and weather events, such as a drought, hurricanes, or ice storms, can strongly imprint ecosystem processing and may alter ecosystem structure. Ecosystems in extreme environments are particularly vulnerable because of their adaptation to severe limitations in energy, water, or nutrients. The vulnerability can be expressed as a relatively long-lasting ecosystem response to a small or brief change in environmental conditions. Such an event occurred in Antarctica and affected two vastly different ecosystems: a marine-dominated coastal system and a terrestrial polar desert. Both sites experienced winds that warmed air temperatures above the 0\&deg;C threshold, resulting in extensive snow and ice melt and triggering a series of cascading effects through the ecosystems that are continuing to play out more than a decade later. This highlights the sensitivity of Antarctic ecosystems to warming events, which should occur more frequently in the future with global climate warming.</p>},
	keywords = {LTER-MCM},
	issn = {0006-3568},
	doi = {10.1093/biosci/biw110},
	url = {http://academic.oup.com/bioscience/article-pdf/66/10/848/7510601/biw110.pdf},
	author = {Andrew G Fountain and Saba, Grace and Byron Adams and Peter T. Doran and Fraser, William and Michael N. Gooseff and Maciek K. Obryk and John C. Priscu and Sharon E. Stammerjohn and Ross A. Virginia}
}
@article {1334,
	title = {Identification of a psychrophilic green alga from Lake Bonney, Antarctica: Chlamydomonas raudensis ETTL. (UWO 241) (Chlorophyceae)},
	journal = {Journal of Phycology},
	volume = {40},
	year = {2004},
	pages = {1138-1148},
	keywords = {LTER-MCM},
	author = {Pocock, T and Lachance, M and Proschold, T and John C. Priscu and Kim, S and Norman P.A. Huner}
}
@article {1320,
	title = {Impact of episodic warming events on the physical, chemical and biological relationships of lakes in the McMurdo Dry Valleys, Antarctica},
	journal = {Aquatic Geochemistry},
	volume = {10},
	year = {2004},
	month = {09/2004},
	pages = {239-268},
	type = {Journal},
	keywords = {LTER-MCM, Climate Response, stoichiometry},
	doi = {10.1007/s10498-004-2261-3},
	url = {http://link.springer.com/article/10.1007\%2Fs10498-004-2261-3},
	author = {Christine M. Foreman and Wolf, C and John C. Priscu}
}
@article {1432,
	title = {The importance of landscape position and legacy: The evolution of the Taylor  Valley Lake District, Antarctica.},
	journal = {Freshwater Biology},
	volume = {43},
	year = {2000},
	pages = {355-367},
	keywords = {LTER-MCM},
	author = {W. Berry Lyons and Andrew G Fountain and Peter T. Doran and John C. Priscu and Klaus Neumann and Kathleen A. Welch}
}
@article {1637,
	title = {Influence of high salinity levels on ambient inorganic nitrogen and nitrogen-15 extraction efficiency in Lake Bonney},
	journal = {Antarctic Journal of the U.S.},
	volume = {28},
	year = {1993},
	pages = {245-246},
	keywords = {LTER-MCM},
	author = {Richard D.  Bartlett and John C. Priscu and Christopher D. Woolston}
}
@article {1657,
	title = {Inorganic Nitrogen Uptake and Regeneration in Perennially Ice-Covered Lakes Fryxell and Vanda, Antarctica},
	journal = {Journal of Plankton Research},
	volume = {11},
	year = {1989},
	pages = {335-351},
	keywords = {LTER-MCM},
	author = {John C. Priscu and Warwick F. Vincent and Clive Howard-Williams}
}
