Limnological conditions in subglacial Lake Vostok, Antarctica

dc.contributor.authorChristner, Brent C.
dc.contributor.authorRoyston-Bishop, George
dc.contributor.authorForeman, Christine M.
dc.contributor.authorArnold, Brianna R.
dc.contributor.authorTranter, Martyn
dc.contributor.authorWelch, Kathleen A.
dc.contributor.authorLyons, W. Berry
dc.contributor.authorTsapin, Alexandre I.
dc.contributor.authorStudinger, Michael
dc.contributor.authorPriscu, John C.
dc.date.accessioned2017-07-13T22:17:52Z
dc.date.available2017-07-13T22:17:52Z
dc.date.issued2006-11
dc.description.abstractSubglacial Lake Vostok is located ~4 km beneath the surface of the East Antarctic Ice Sheet and has been isolated from the atmosphere for >15 million yr. Concerns for environmental protection have prevented direct sampling of the lake water thus far. However, an ice core has been retrieved from above the lake in which the bottom ~85 m represents lake water that has accreted (i.e., frozen) to the bottom of the ice sheet. We measured selected constituents within the accretion ice core to predict geomicrobiological conditions within the surface waters of the lake. Bacterial density is two- to sevenfold higher in accretion ice than the overlying glacial ice, implying that Lake Vostok is a source of bacterial carbon beneath the ice sheet. Phylogenetic analysis of amplified small subunit ribosomal ribonucleic acid (rRNA) gene sequences in accretion ice formed over a deep portion of the lake revealed phylotypes that classify within the β-, y-, and δ-Proteobacteria. Cellular, major ion, and dissolved organic carbon levels all decreased with depth in the accretion ice (depth is a proxy for increasing distance from the shoreline), implying a greater potential for biological activity in the shallow shoreline waters of the lake. Although the exact nature of the biology within Lake Vostok awaits direct sampling of the lake water, our data from the accretion ice support the working hypothesis that a sustained microbial ecosystem is present in this subglacial lake environment, despite high pressure, constant cold, low nutrient input, potentially high oxygen concentrations, and an absence of sunlight.en_US
dc.identifier.citationChristner BC, Royston-Bishop G, Foreman CM, Arnold BR, Tranter M, Welsh KA, Lyons WB, Tsapin AI, Studinger M, Priscu JC, "Limnological conditions in subglacial Lake Vostok, Antarctica," Limnol Oceanogr, 2006 51(6):2485-2501en_US
dc.identifier.issn0024-3590
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/13287
dc.titleLimnological conditions in subglacial Lake Vostok, Antarcticaen_US
dc.typeArticleen_US
mus.citation.extentfirstpage2845en_US
mus.citation.extentlastpage2501en_US
mus.citation.issue6en_US
mus.citation.journaltitleLimnology and Oceanographyen_US
mus.citation.volume51en_US
mus.contributor.orcidForeman, Christine M.|0000-0003-0230-4692en_US
mus.data.thumbpage3en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.doi10.4319/lo.2006.51.6.2485en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

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