Search Results - "Fritsen, Christian H"

Microbial life at −13 °C in the brine of an ice-sealed Antarctic lake by Murray, Alison E, Kenig, Fabien, Fritsen, Christian H, McKay, Christopher P, Cawley, Kaelin M, Edwards, Ross, Kuhn, Emanuele, McKnight, Diane M, Ostrom, Nathaniel E, Peng, Vivian, Ponce, Adrian, Priscu, John C, Samarkin, Vladimir, Townsend, Ashley T, Wagh, Protima, Young, Seth A, Yung, Pung To, Doran, Peter T

“…The permanent ice cover of Lake Vida (Antarctica) encapsulates an extreme cryogenic brine ecosystem (−13 °C; salinity, 200). This aphotic ecosystem is anoxic…”
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Brine assemblages of ultrasmall microbial cells within the ice cover of Lake Vida, Antarctica by Kuhn, Emanuele, Ichimura, Andrew S, Peng, Vivian, Fritsen, Christian H, Trubl, Gareth, Doran, Peter T, Murray, Alison E

“…The anoxic and freezing brine that permeates Lake Vida's perennial ice below 16 m contains an abundance of very small (≤0.2-μm) particles mixed with a less…”
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Antarctic climate cooling and terrestrial ecosystem response by Doran, Peter T, Priscu, John C, Lyons, W. Berry, Walsh, John E, Fountain, Andrew G, McKnight, Diane M, Moorhead, Daryl L, Virginia, Ross A, Wall, Diana H, Clow, Gary D, Fritsen, Christian H, McKay, Christopher P, Parsons, Andrew N

“…The average air temperature at the Earth's surface has increased by 0.06 °C per decade during the 20th century, and by 0.19 °C per decade from 1979 to 1998…”
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Primary production throughout austral fall, during a time of decreasing daylength in the western Antarctic Peninsula by Vernet, Maria, Kozlowski, Wendy A., Yarmey, Lynn R., Lowe, Alexander T., Ross, Robin M., Quetin, Langdon B., Fritsen, Christian H.

“…Antarctic phytoplankton is characterized by a pronounced seasonality in abundance, driven mainly by changes in sunlight. We combined measurements and modeling…”
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Microbiota within the perennial ice cover of Lake Vida, Antarctica by Mosier, Annika C, Murray, Alison E, Fritsen, Christian H

“…Lake Vida, located in the McMurdo Dry Valleys, Antarctica, is an 'ice-sealed' lake with ~19 m of ice covering a highly saline water column (~245 ppt). The…”
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Extreme hydrochemical conditions in natural microcosms entombed within Antarctic ice by Tranter, Martyn, Fountain, Andrew G., Fritsen, Christian H., Berry Lyons, W., Priscu, John C., Statham, Peter J., Welch, Kathy A.

“…Cryoconite holes are near‐vertical tubes that form in the surface of glaciers when solar‐heated debris melts into the ice. Those that form in the McMurdo Dry…”
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Perennial Antarctic Lake Ice: An Oasis for Life in a Polar Desert by Priscu, John C., Fritsen, Christian H., Adams, Edward E., Giovannoni, Stephen J., Paerl, Hans W., McKay, Christopher P., Doran, Peter T., Gordon, Douglas A., Lanoil, Brian D., Pinckney, James L.

“…The permanent ice covers of Antarctic lakes in the McMurdo Dry Valleys develop liquid water inclusions in response to solar heating of internal aeolian-derived…”
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The timing of sea ice formation and exposure to photosynthetically active radiation along the Western Antarctic Peninsula by Fritsen, Christian H., Memmott, Jeramie C., Ross, Robin M., Quetin, Langdon B., Vernet, Maria, Wirthlin, Eric D.

“…Understanding the flow of solar energy into ecosystems is fundamental to understanding ecosystem productivity and dynamics. To gain a better understanding of…”
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Carbon Transformations in a Perennially Ice-Covered Antarctic Lake by Priscu, John C., Wolf, Craig F., Takacs, Cristina D., Fritsen, Christian H., Laybourn-Parry, Johanna, Roberts, Emily C., Sattler, Birgit, Lyons, W. Berry

“…Priscu describes the physical, chemical, and biological conditions in Lake Bonney, a prominent lake within the McMurdo Dry Valleys. Using this framework, he…”
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Formation and Character of an Ancient 19-m Ice Cover and Underlying Trapped Brine in an "Ice-Sealed" East Antarctic Lake by Doran, Peter T., Fritzen, Christian H., McKay, Christopher P., Priscu, John C., Adams, Edward E.

“…Lake Vida, one of the largest lakes in the McMurdo Dry Valleys of Antarctica, was previously believed to be shallow (<10 m) and frozen to its bed year-round…”
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NOVEL ICE-BINDING PROTEINS FROM A PSYCHROPHILIC ANTARCTIC ALGA (CHLAMYDOMONADACEAE, CHLOROPHYCEAE) by Raymond, James A, Janech, Michael G, Fritsen, Christian H

“…Many cold-adapted unicellular plants express ice-active proteins, but at present, only one type of such proteins has been described, and it shows no…”
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Distribution of freshwater diatom Didymosphenia geminata in streams in the Sierra Nevada, USA, in relation to water chemistry and bedrock geology by Rost, Andy L, Fritsen, Christian H, Davis, Clinton J

“…The freshwater stalked diatom, Didymosphenia geminata, has increased its proliferation in new and native ranges with the potential for significant ecological…”
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Influence of a tributary stream on benthic communities in a Didymosphenia geminata impacted stream in the Sierra Nevada, USA by Rost, Andy L, Fritsen, Christian H

“…The freshwater stalked diatom Didymosphenia geminata can alter benthic community structure. However, the numbers of D. geminata that must be present to do this…”
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Bio-optical properties of Antarctic pack ice in the early austral spring by Fritsen, Christian H., Wirthlin, Eric D., Momberg, Diane K., Lewis, Michael J., Ackley, Stephen F.

“…Pack ice in the Bellingshausen Sea contained moderate to high stocks of microalgal biomass (3–10 mg Chl a m −2) spanning the range of general sea-ice…”
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Simulating larval Antarctic krill growth and condition factor during fall and winter in response to environmental variability by Lowe, Alexander T., Ross, Robin M., Quetin, Langdon B., Vernet, Maria, Fritsen, Christian H.

“…The first winter in the life cycle of Antarctic krillEuphausia superbais a critical period in which larval survival and recruitment to the adult population are…”
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Identification and quantification of aquatic vegetation with hyperspectral remote sensing in western Nevada rivers, USA by Lee, Baek Soo, McGwire, Kenneth C, Fritsen, Christian H

“…This study used a portable spectrometer to assess the feasibility of using airborne hyperspectral imagery to map the dominant types and amounts of aquatic…”
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The search for life on Europa: limiting environmental factors, potential habitats, and Earth analogues by Marion, Giles M, Fritsen, Christian H, Eicken, Hajo, Payne, Meredith C

“…The putative ocean of Europa has focused considerable attention on the potential habitats for life on Europa. By generally clement Earth standards, these…”
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Perchlorate and volatiles of the brine of Lake Vida (Antarctica): Implication for the in situ analysis of Mars sediments by Kenig, Fabien, Chou, Luoth, McKay, Christopher P., Jackson, W. Andrew, Doran, Peter T., Murray, Alison E., Fritsen, Christian H.

“…The cold (−13.4°C), cryoencapsulated, anoxic, interstitial brine of the >27 m thick ice of Lake Vida (Victoria Valley, Antarctica) contains 49 µg · L−1 of…”
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Comment on “El Niño suppresses Antarctic warming” by N. Bertler et al by Doran, Peter T., Priscu, John C., Lyons, W. Berry, Walsh, John E., Fountain, Andrew G., McKnight, Diane M., Moorhead, Daryl L., Virginia, Ross A., Wall, Diana H., Clow, Gary D., Fritsen, Christian H., McKay, Christopher P., Parsons, Andrew N.

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Biomass and neutral lipid production in geothermal microalgal consortia by Bywaters, Kathryn F, Fritsen, Christian H

“…Recently, technologies have been developed that offer the possibility of using algal biomass as feedstocks to energy producing systems - in addition to…”
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