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Stability of peatland carbon to rising temperatures.

Title: Stability of peatland carbon to rising temperatures.
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Name(s): Wilson, R M, author
Hopple, A M, author
Tfaily, M M, author
Sebestyen, S D, author
Schadt, C W, author
Pfeifer-Meister, L, author
Medvedeff, C, author
McFarlane, K J, author
Kostka, J E, author
Kolton, M, author
Kolka, R K, author
Kluber, L A, author
Keller, J K, author
Guilderson, T P, author
Griffiths, N A, author
Chanton, J P, author
Bridgham, S D, author
Hanson, P J, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2016-12-13
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Peatlands contain one-third of soil carbon (C), mostly buried in deep, saturated anoxic zones (catotelm). The response of catotelm C to climate forcing is uncertain, because prior experiments have focused on surface warming. We show that deep peat heating of a 2 m-thick peat column results in an exponential increase in CH emissions. However, this response is due solely to surface processes and not degradation of catotelm peat. Incubations show that only the top 20-30 cm of peat from experimental plots have higher CH production rates at elevated temperatures. Radiocarbon analyses demonstrate that CH and CO are produced primarily from decomposition of surface-derived modern photosynthate, not catotelm C. There are no differences in microbial abundances, dissolved organic matter concentrations or degradative enzyme activities among treatments. These results suggest that although surface peat will respond to increasing temperature, the large reservoir of catotelm C is stable under current anoxic conditions.
Identifier: FSU_pmch_27958276 (IID), 10.1038/ncomms13723 (DOI), PMC5159855 (PMCID), 27958276 (RID), 27958276 (EID), ncomms13723 (PII)
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5159855.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_27958276
Owner Institution: FSU
Is Part Of: Nature communications.
2041-1723
Issue: vol. 7

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Wilson, R. M., Hopple, A. M., Tfaily, M. M., Sebestyen, S. D., Schadt, C. W., Pfeifer-Meister, L., … Hanson, P. J. (2016). Stability of peatland carbon to rising temperatures. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_27958276