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Panneer Selvam B, Lapierre JF, Guillemette F, et al. Degradation potentials of dissolved organic carbon (DOC) from thawed permafrost peat. Sci Rep. 2017;7:45811doi: 10.1038/srep45811.
Panneer Selvam, B., Lapierre, J. F., Guillemette, F., Voigt, C., Lamprecht, R. E., Biasi, C., Christensen, T. R., Martikainen, P. J., & Berggren, M. (2017). Degradation potentials of dissolved organic carbon (DOC) from thawed permafrost peat. Scientific reports, 745811. https://doi.org/10.1038/srep45811
Panneer Selvam, Balathandayuthabani, et al. "Degradation potentials of dissolved organic carbon (DOC) from thawed permafrost peat." Scientific reports vol. 7 (2017): 45811. doi: https://doi.org/10.1038/srep45811
Panneer Selvam B, Lapierre JF, Guillemette F, Voigt C, Lamprecht RE, Biasi C, Christensen TR, Martikainen PJ, Berggren M. Degradation potentials of dissolved organic carbon (DOC) from thawed permafrost peat. Sci Rep. 2017 Apr 05;7:45811. doi: 10.1038/srep45811. PMID: 28378792; PMCID: PMC5395014.
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Sci Rep. 2017 Apr 05;7:45811. doi: 10.1038/srep45811.

Degradation potentials of dissolved organic carbon (DOC) from thawed permafrost peat.

Scientific reports

Balathandayuthabani Panneer Selvam, Jean-François Lapierre, Francois Guillemette, Carolina Voigt, Richard E Lamprecht, Christina Biasi, Torben R Christensen, Pertti J Martikainen, Martin Berggren

Affiliations

  1. Department of Physical Geography and Ecosystem Science, Lund University, Sweden.
  2. Département de sciences biologiques, Université de Montréal, Canada.
  3. Research Center for Watershed ? Aquatic Ecosystem Interactions (RIVE), Department of Environmental Sciences, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada.
  4. Department of Environmental and Biological Sciences, University of Eastern Finland, Finland.
  5. Arctic Research Centre, Aarhus University, Denmark.

PMID: 28378792 PMCID: PMC5395014 DOI: 10.1038/srep45811

Abstract

Global warming can substantially affect the export of dissolved organic carbon (DOC) from peat-permafrost to aquatic systems. The direct degradability of such peat-derived DOC, however, is poorly constrained because previous permafrost thaw studies have mainly addressed mineral soil catchments or DOC pools that have already been processed in surface waters. We incubated peat cores from a palsa mire to compare an active layer and an experimentally thawed permafrost layer with regard to DOC composition and degradation potentials of pore water DOC. Our results show that DOC from the thawed permafrost layer had high initial degradation potentials compared with DOC from the active layer. In fact, the DOC that showed the highest bio- and photo-degradability, respectively, originated in the thawed permafrost layer. Our study sheds new light on the DOC composition of peat-permafrost directly upon thaw and suggests that past estimates of carbon-dioxide emissions from thawed peat permafrost may be biased as they have overlooked the initial mineralization potential of the exported DOC.

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