@article {2478,
	title = {Stability of peatland carbon to rising temperatures},
	journal = {Nature Communications},
	volume = {7},
	year = {2016},
	month = {Jan-12-2017},
	pages = {13723},
	abstract = {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 CH4 emissions. However, this response is due solely to surface processes and not degradation of catotelm peat. Incubations show that only the top 20{\textendash}30 cm of peat from experimental plots have higher CH4 production rates at elevated temperatures. Radiocarbon analyses demonstrate that CH4 and CO2 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.},
	doi = {10.1038/ncomms13723},
	url = {http://www.nature.com/doifinder/10.1038/ncomms13723},
	author = {Wilson, R. M. and Hopple, A. M. and Tfaily, M. M. and Sebestyen, S. D. and Schadt, C. W. and Pfeifer-Meister, L. and Medvedeff, C. and McFarlane, K. J. and Kostka, J. E. and Kolton, M. and Kolka, R.K. and Kluber, L. A. and Keller, J. K. and Guilderson, T. P. and Griffiths, N. A. and Chanton, J. P. and Bridgham, S. D. and Hanson, P. J.}
}
@article {585,
	title = {Natural-abundance radiocarbon as a tracer of assimilation of petroleum carbon by bacteria in salt marsh sediments},
	journal = {Geochimica Et Cosmochimica Acta},
	volume = {70},
	year = {2006},
	note = {030olTimes Cited:27Cited References Count:65},
	month = {Apr 1},
	pages = {1761-1771},
	abstract = {The natural abundance of radiocarbon ((14)C) provides unique insight into the source and cycling of sedimentary organic matter. Radiocarbon analysis of bacterial phospholipid lipid fatty acids (PLFAs) in salt-marsh sediments of southeast Georgia (USA)-one heavily contaminated by petroleum residues-was used to assess the fate of petroleum-derived carbon in sediments and incorporation of fossil carbon into microbial biomass. PLFAs that are common components of eubacterial cell membranes (e.g., branched C(15) and C(17), 10-methyl-C(16)) were depleted in (14)C in the contaminated sediment (mean Delta(14)C value of +25 +/- 19 parts per thousand for bacterial PLFAs) relative to PLFAs in uncontaminated "control" sediment (Delta(14)C = +101 +/- 12 parts per thousand). We suggest that the (14)C-depletion in bacterial PLFAs at the contaminated site results from microbial metabolism of petroleum and subsequent incorporation of petroleum-derived carbon into bacterial membrane lipids. A mass balance calculation indicates that 6-10\% of the carbon in bacterial PLFAs at the oiled site could derive from petroleum residues. These results demonstrate that even weathered petroleum may contain components of sufficient lability to be a carbon source for biomass production by marsh sediment microorganisms. Furthermore, a small but significant fraction of fossil carbon is assimilated even in the presence of a much larger pool of presumably more-labile and faster-cycling carbon substrates. (c) 2006 Elsevier Inc. All rights reserved.},
	issn = {0016-7037},
	doi = {10.1016/j.gca.2005.12.020},
	author = {Wakeham, S. G. and McNichol, A. P. and Kostka, J. E. and Pease, T. K.}
}
