Microbiology of the subglacial Lake Vostok: first results of borehole-frozen lake water analysis and prospects for searching for lake inhabitants

@article{Bulat2016MicrobiologyOT,
  title={Microbiology of the subglacial Lake Vostok: first results of borehole-frozen lake water analysis and prospects for searching for lake inhabitants},
  author={Sergey Bulat},
  journal={Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences},
  year={2016},
  volume={374}
}
  • S. Bulat
  • Published 28 January 2016
  • Environmental Science
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
This article examines the question of the possible existence of microbial life inhabiting the subglacial Lake Vostok buried beneath a 4 km thick Antarctic ice sheet. It represents the results of analysis of the only available frozen lake water samples obtained upon the first lake entry and subsequent re-coring the water frozen within the borehole. For comparison, results obtained by earlier molecular microbiological studies of accretion ice are included in this study, with the focus on… 
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References

SHOWING 1-10 OF 28 REFERENCES
Limnological conditions in Subglacial Lake Vostok, Antarctica
Subglacial 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
DNA signature of thermophilic bacteria from the aged accretion ice of Lake Vostok, Antarctica: implications for searching for life in extreme icy environments
We have used 16S ribosomal genes to estimate the bacterial contents of Lake Vostok accretion ice samples at 3551 m and 3607 m, both containing sediment inclusions and formed 20000–15000 yr ago.
Antarctic subglacial lake exploration: first results and future plans
TLDR
This article summarizes the results of these programmes in terms of the scientific results obtained, the operational knowledge gained and the engineering challenges revealed, to collate what is known about Antarctic subglacial environments and how to explore them in future.
Isolation of bacteria and 16S rDNAs from Lake Vostok accretion ice.
TLDR
The recovery of bacterial isolates belonging to the Brachybacteria, Methylobacterium, Paenibacillus and Sphingomonas lineages are reported from a sample of melt water from this accretion ice that originated 3593 m below the surface.
Molecular analysis of bacterial diversity in kerosene-based drilling fluid from the deep ice borehole at Vostok, East Antarctica.
TLDR
The results obtained indicate the persistence of bacteria in extremely cold, hydrocarbon-rich environments and show the potential for contamination of ice and subglacial water samples during lake exploration, and the need to develop a microbiological database of drilling fluid findings.
Presence of Hydrogenophilus thermoluteolus DNA in accretion ice in the subglacial Lake Vostok, Antarctica, assessed using rrs, cbb and hox.
TLDR
Results point to the presence of thermophilic chemoautotrophic microorganisms in Lake Vostok accretion ice that presumably originate from deep faults in the bedrock cavity containing the lake in which episodes of seismotectonic activity would release debris along with microbial cells.
Microorganisms in the accreted ice of Lake Vostok, Antarctica.
TLDR
Analysis of accreted ice data suggest that Lake Vostok may contain viable microorganisms, and at least a portion of the microbial assemblage was viable, as determined by the respiration of carbon-14-labeled acetate and glucose substrates during incubations at 3 degrees C and 1 atmosphere.
Geomicrobiology of subglacial ice above Lake Vostok, Antarctica.
TLDR
Bacterial 16S ribosomal DNA genes revealed low diversity in the gene population, and phylotypes were closely related to extant members of the alpha- and beta-Proteobacteria and the Actinomycetes.
Origin and fate of Lake Vostok water frozen to the base of the East Antarctic ice sheet
TLDR
A reconstruction of the ice flow trajectories for the Vostok core site is presented, using ice-penetrating radar data and Global Positioning System measurements of surface ice velocity to find that the ice sheet has a significant along-lake flow component, persistent since the Last Glacial Maximum.
PROSPECTS FOR LIFE IN THE SUBGLACIAL LAKE VOSTOK, EAST ANTARCTICA
The objective was to estimate the genuine microbial content of ice samples from refrozen water (accretion ice) from the subglacialLakeVostok(Antarctica) buried beneath the 4-km thick East Antarctic
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