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dc.contributor.authorYvon-Durocher, Gabriel-
dc.contributor.authorMontoya, José M.-
dc.contributor.authorWoodward, Guy-
dc.contributor.authorJones, J. Iwan-
dc.contributor.authorTrimmer, Mark-
dc.identifier.citationGlobal Change Biology 17(2) : 1225-1234 (2011)es_ES
dc.description10 pages, 6 figures, 1 tablees_ES
dc.description.abstractMethane (CH4) and carbon dioxide (CO2) are the dominant gaseous end products of the remineralization of organic carbon and also the two largest contributors to the anthropogenic greenhouse effect. We investigated whether warming altered the balance of CH4 efflux relative to gross primary production (GPP) and ecosystem respiration (ER) in a freshwater mesocosm experiment. Whole ecosystem CH4 efflux was strongly related to temperature with an apparent activation energy of 0.85 eV. Furthermore, CH4 efflux increased faster than ER or GPP with temperature, with all three processes having sequentially lower activation energies. Warming of 4 °C increased the fraction of GPP effluxing as CH4 by 20% and the fraction of ER as CH4 by 9%, in line with the offset in their respective activation energies. Because CH4 is 21 times more potent as a greenhouse gas, relative to CO2, these results suggest freshwater ecosystems could drive a previously unknown positive feedback between warming and the carbon cycle.es_ES
dc.description.sponsorshipG. Yvon-Durocher was supported by a Natural Environment Research Council studentship (NER/S/A2006/14029). J. Montoya was funded by the NERC Fellowship Scheme (NE/C002105/1), and a Ramon y Cajal Fellowship (RYC-2008-03664).es_ES
dc.publisherBlackwell Publishinges_ES
dc.subjectCarbon cyclees_ES
dc.subjectEcosystem respirationes_ES
dc.subjectGlobal warminges_ES
dc.subjectMetabolic theoryes_ES
dc.subjectPrimary productiones_ES
dc.titleWarming increases the proportion of primary production emitted as methane from freshwater mesocosmses_ES
dc.description.peerreviewedPeer reviewedes_ES
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