Root oxygen mitigates methane fluxes in tropical peatlands

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dc.contributor.authorGirkin, Nicholas T.
dc.contributor.authorVane, Christopher H.
dc.contributor.authorTurner, Benjamin L.
dc.contributor.authorOstle, Nicholas J.
dc.contributor.authorSjögersten, Sofie
dc.date.accessioned2020-06-09T13:15:07Z
dc.date.available2020-06-09T13:15:07Z
dc.date.freetoread2020-06-09
dc.date.issued2020-05-27
dc.description.abstractTropical peatlands are a globally important source of methane, a potent greenhouse gas. Vegetation is critical in regulating fluxes, providing a conduit for emissions and regular carbon inputs. However, plant roots also release oxygen, which might mitigate methane efflux through oxidation prior to emission from the peat surface. Here we show, using in situ mesocosms, that root exclusion can reduce methane fluxes by a maximum of 92% depending on species, likely driven by the significant decrease in root inputs of oxygen and changes in the balance of methane transport pathways. Methanotroph abundance decreased with reduced oxygen input, demonstrating a likely mechanism for the observed response. These first methane oxidation estimates for a tropical peatland demonstrate that although plants provide an important pathway for methane loss, this can be balanced by the influence of root oxygen inputs that mitigate peat surface methane emissions.en_UK
dc.identifier.citationGirkin N, Vane CH, Turner B,et al., (2020) Root oxygen mitigates methane fluxes in tropical peatlands. Environmental Research Letters, Volume 15, Issue 6, Article number 064013en_UK
dc.identifier.cris26897070
dc.identifier.issn1748-9326
dc.identifier.urihttps://doi.org/10.1088/1748-9326/ab8495
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15484
dc.language.isoenen_UK
dc.publisherIOPen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjecttropical peaten_UK
dc.subjectoxygenen_UK
dc.subjectmethaneen_UK
dc.subjectmethanogenesisen_UK
dc.subjectmethanotrophyen_UK
dc.titleRoot oxygen mitigates methane fluxes in tropical peatlandsen_UK
dc.typeArticleen_UK

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