Articles | Volume 13, issue 12
https://doi.org/10.5194/bg-13-3833-2016
https://doi.org/10.5194/bg-13-3833-2016
Research article
 | 
01 Jul 2016
Research article |  | 01 Jul 2016

Identification and analysis of low-molecular-weight dissolved organic carbon in subglacial basal ice ecosystems by ion chromatography

Emily C. O'Donnell, Jemma L. Wadham, Grzegorz P. Lis, Martyn Tranter, Amy E. Pickard, Marek Stibal, Paul Dewsbury, and Sean Fitzsimons

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Cited articles

Anesio, A. M., Hodson, A. J., Fritz, A., Psenner, R., and Sattler, B.: High microbial activity on glaciers: importance to the global carbon cycle, Global Change Biol., 15, 955–960, https://doi.org/10.1111/j.1365-2486.2008.01758.x, 2009.
Barker, J. D., Sharp, M. J., Fitzsimons, S. J., and Turner, R. J.: Abundance and dynamics of dissolved organic carbon in glacier systems, Arct. Antarct. Alp. Res., 38, 163–172, https://doi.org/10.1657/1523-0430(2006)38[163:AADODO]2.0.CO;2, 2006.
Barker, J. D., Sharp, M. J., and Turner, R. J.: Using synchronous fluorescence spectroscopy and principal component analysis to monitor dissolved organic matter dynamics in a glacier system, Hydrol. Process., 23, 1487–1500, https://doi.org/10.1002/hyp.7274, 2009.
Barker, J. D., Klassen, J., Sharp, M. J., Fitzsimons, S. J., and Turner, R. J.: Detecting biogeochemical activity in basal ice using fluorescence spectroscopy, Ann. Glaciol., 51, 47–55, https://doi.org/10.3189/172756411795931967, 2010.
Bhatia, M., Sharp, M., and Foght, J.: Distinct bacterial communities exist beneath a high arctic polythermal glacier, Appl. Environ. Microbiol., 72, 5838–5845, https://doi.org/10.1128/AEM.00595-06, 2006.
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Short summary
We use a novel ion chromatographic analysis that provides the first identification and quantification of major low-molecular-weight dissolved organic carbon (LMW-DOC) compounds in basal ice. LMW-DOC concentrations were dependent on the bioavailability of the overridden organic carbon, which in turn was influenced by the type of overridden material. The overridden material may thus act as a direct (abiotic leaching) and indirect (microbial cycling) source of DOC to the subglacial environment.
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