Abstract
Little information exists on biogeochemical transformations in aquatic ecosystems beneath polar ice sheets (i.e., water-saturated sediments, streams, rivers, and lakes) and their role in global elemental cycles. Subglacial environments may represent important sources of atmospheric CO2 and/or CH4 during deglaciation, thus acting as amplifiers in the climate system. However, the role of subglacial environments in global climate processes has been difficult to assess given the absence of biogeochemical data from the basal zones of inland polar ice sheets. Here, we report on the concentrations of CO2, CH4, and H2 in samples of refrozen basal water recovered at a depth of ~3,042 meters below the surface during the North Greenland Ice Core Project (NGRIP). CH4 and H2 concentrations in the NGRIP samples were approximately 60- and 700-fold higher, respectively, relative to air-equilibrated water, whereas CO2 was ~fivefold lower. Metabolic pathways such as (1) methanogenesis, (2) organic matter fermentation, carboxydotrophic, and/or methylotrophic activity, and (3) CO2 fixation provide plausible biotic explanations for the observed CH4, H2, and CO2 concentrations, respectively.
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References
Alekhina IA, Marie D, Petit JR, Lukin VV, Zubkov VM, Bulat SA (2007) Molecular analysis of bacterial diversity in kerosene-based drilling fluid from the deep ice borehole at Vostok, East Antarctica. FEMS Microbiol Ecol 59:289–299
Andersen KK et al (2004) High-resolution record of Northern Hemisphere climate extending into the last interglacial period. Nature 431:47–51
Boyd ES, Skidmore M, Bakermans C, Mitchell A, Peters JW (2010) Methanogenesis in subglacial sediments. Environ Microbiol Rep 2:685–692
Buchardt SL, Dahl-Jensen D (2007) Estimating the basal melt rate at NorthGRIP using a Monte Carlo technique. Ann Glaciol 45:137–142
Bulat S, Alekhina I, Petit J-R, Steffensen JP, Dahl-Jensen D (2005) Bacteria and archaea under Greenland Ice Sheet: NGRIP ‘red’ ice issue. Geophys Res Abstr 7:05298
Christner BC, Mikucki JA, Foreman CM, Denson J, Priscu JC (2005) Glacial ice cores: a model system for developing extraterrestrial decontamination protocols. Icarus 174:572–584
Christner BC, Royston-Bishop G, Foreman CF, Arnold BR, Tranter M, Welch KA, Lyons WB, Tsapin AI, Studinger M, Priscu JC (2006) Limnological conditions in Subglacial Lake Vostok, Antarctica. Limnol Oceanogr 51:2485–2501
Christner BC, Skidmore ML, Priscu JC, Tranter M, Foreman CM (2008) Bacteria in subglacial environments. In: Margesin R, Schinner F, Marx J-C, Gerday C (eds) Psychrophiles: from biodiversity to biotechnology. Springer, New York, pp 51–71
Dahl-Jensen D, Johnsen S, Willerslev E, Miller H, Thorsteinsonn T (2003) Basal water at the NorthGRIP drill site. In: Third mars polar science conference, 13–17 October 2003, Alberta, Canada
Fahnestock M, Abdalati W, Joughin I, Brozena J, Gogineni P (2001) High geothermal heat flow, basal melt, and the origin of rapid ice flow in central Greenland. Science 294:2338–2342
Hood E, Fellman J, Spencer RGM, Hernes PJ, Edwards R, D’Amore D, Scott D (2009) Glaciers as a source of ancient and labile organic matter to the marine environment. Nature 462:1044–1047
Lanoil B, Skidmore M, Priscu JC, Han S, Foo W, Vogel SW, Tulaczyk S, Engelhardt H (2009) Bacteria beneath the West Antarctic Ice Sheet. Environ Microbiol 11:609–615
Mason OU, Nakagawa T, Rosner M, Van Nostrand JD, Zhou J et al (2010) First investigation of the microbiology of the deepest layer of ocean crust. PLoS ONE 5:e15399. doi:10.1371/journal.pone.0015399
Mikucki JA, Pearson A, Johnston DT, Turchyn AV, Farquhar J, Schrag DP, Anbar AD, Priscu JC, Lee PA (2009) A contemporary microbial maintained subglacial ferrous “ocean”. Science 324:397–400
Miteva VI, Sheridan PP, Brenchley JB (2004) Phylogenetic and physiological diversity of microorganisms isolated from a deep Greenland ice core. Appl Environ Microbiol 70:202–213
Miteva V, Sowers T, Olsen C, Brenchley J (2006) Geochemical and molecular data support a biogenic origin of methane in the basal Greenland ice. ISME 11 Vienna, Austria A371
Miteva V, Teacher C, Sowers T, Brenchley J (2009) Comparison of the microbial diversity at different depths of the GISP2 Greenland ice core in relationship to deposition climates. Environ Microbiol 11:640–656
National Research Council (2011) Frontiers in understanding climate change and polar ecosystems. National Academies Press, Washington, DC
Paterson WSB (1994) The physics of glaciers. Butterworth-Heinemann, Oxford
Priscu JC, Tulaczyk S, Studinger M, Kennicutt MC II, Christner BC, Foreman CM (2008) Antarctic subglacial water: origin, evolution and ecology. In: Vincent W, Laybourn-Parry J (eds) Polar lakes and rivers. Oxford University Press, Oxford, pp 119–135
Rohde RA, Price PB, Bay RC, Bramall NE (2008) In situ microbial metabolism as a cause of gas anomalies in ice. Proc Natl Acad Sci USA 105:8672–8687
Royston-Bishop GW (2006) The hydrochemistry of Subglacial Lake Vostok, Antarctica. Dissertation, Bristol Glaciology Centre, University of Bristol
Samyn D, Fitzsimons S, Lorrain R (2005) Strain induced changes within cold basal ice from Taylor Glacier (Antarctica) as indicated by gas and microstructural analyses. J Glaciol 51:611–619
Sharp M, Parkes J, Cragg B, Fairchild IJ, Lamb H, Tranter M (1999) Widespread bacterial populations at glacier beds and their relationship to rock weathering and carbon cycling. Geology 27:107–110
Schrenk MO, Huber JA, Edwards KJ (2010) Microbial provinces in the subseafloor. Annu Rev Mar Sci 2:279–304
Siegert MJ, Ellis-Evans JC, Tranter M, Mayer C, Petit J-R, Salamatin A, Priscu JC (2001) Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes. Nature 414:603–609
Skidmore M (2011) Microbial communities in Antarctic subglacial aquatic environments. In: Siegert MJ, Bindschadler R, Kennicutt MC (eds) Exploration and study of Antarctic subglacial aquatic environments. AGU Press, Washington, DC, pp 61–82
Skidmore M, Anderson SP, Sharp M, Foght J, Lanoil BD (2005) Comparison of microbial community compositions of two subglacial environments reveals a possible role for microbes in chemical weathering processes. Appl Environ Microbiol 71:6986–6997
Sleep NH, Meibom A, Fridriksson T, Coleman RG, Bird DK (2004) H2-rich fluids from serpentinization: geochemical and biotic implications. Proc Natl Acad Sci USA 101:12818–12823
Statham PJ, Skidmore ML, Tranter M (2008) Inputs of glacially derived dissolved and colloidal iron to the coastal ocean and implications for primary productivity. Glob Biogeochem Cycle 22:GB3013. doi:10.1029/2007GB003106
Stibal M, Wadham JL et al (in press) Methanogenic potential of Arctic and Antarctic subglacial environments with contrasting organic carbon sources. Glob Chang Biol
Tung HC, Bramall NE, Price BP (2005) Microbial origin of excess of methane in glacial ice and implications for life on Mars. Proc Natl Acad Sci USA 102:18292–18296
Wadham JL, Tranter M, Tulaczyk S, Sharp M (2008) Subglacial methanogenesis: a potential climatic amplifier? Glob Biogeochem Cycle 22:1–16
Wadham JL, Tranter M, Skidmore M, Hodson AJ, Priscu JC, Lyons WB, Sharp M, Wynn P, Jackson M (2010) Biogeochemical weathering under ice: size matters. Glob Biogeochem Cycle 24:GB3025. doi:10.1029/2009GB003688
Yde JC, Finster KW, Raiswell R, Steffensen JP, Heinemeier J, Osen J, Gunnlaugsson HP, Nielsen OB (2010) Basal ice microbiology at the margin of the Greenland Ice Sheet. Ann Glaciol 51:71–79
Acknowledgments
The ice cores in this study were recovered during the NGRIP ice core project, which was directed by the Ice and Climate Research Group at the Niels Bohr Institute, University of Copenhagen and funded by agencies in Denmark (FNU), Belgium (FNRS-CFB), France (IPEV and INSU/CNRS), Germany (AWI), Iceland (RannIs), Japan (MEXT), Sweden (SPRS), Switzerland (SNF), and the USA (NSF, Office of Polar Programs). We especially acknowledge NGRIP project leader Dorthe Dahl-Jensen for organizing the NGRIP basal ice working group and providing ice core samples for analysis. We also thank D. Mogk and M. Skidmore for assistance with SEM–EDS, S. Busse for assistance with the NMR measurements and interpretation, and G. King for discussion. Travel funding for Brent C. Christner to visit the University of Copenhagen was provided by the Arctic Natural Sciences Program of the NSF. This study was partially supported by NSF grants OPP-0636828, OPP-0838941, and OPP-1023233 awarded to Brent C. Christner, and OPP-0838933, OPP-0839075, OPP-1027284 and NASA NAI5-0021 awarded to John C. Priscu.
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Christner, B.C., Montross, G.G. & Priscu, J.C. Dissolved gases in frozen basal water from the NGRIP borehole: implications for biogeochemical processes beneath the Greenland Ice Sheet. Polar Biol 35, 1735–1741 (2012). https://doi.org/10.1007/s00300-012-1198-z
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DOI: https://doi.org/10.1007/s00300-012-1198-z