气候变化领域集成服务门户(CCPortal): Root oxygen mitigates methane fluxes in tropical peatlands

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DOI	10.1088/1748-9326/ab8495
	Root oxygen mitigates methane fluxes in tropical peatlands
	Girkin N.T.; Vane C.H.; Turner B.L.; Ostle N.J.; Sjögersten S.
发表日期	2020
ISSN	17489318
卷号	15 期号:6
英文摘要	Tropical 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. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	methane; methanogenesis; methanotrophy; oxygen; tropical peat
语种	英语
scopus关键词	Greenhouse gases; Oxygen; Peat; Tropics; Wetlands; Methane emissions; Methane fluxes; Methane loss; Methane oxidation; Methanotrophs; Plant roots; Situ mesocosms; Transport pathways; Methane; bacterium; carbon emission; greenhouse gas; mesocosm; methane; oxidation; oxygen; peatland; reduction; root system; tropical region
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153999
作者单位	Soil and Agrifood Institute, Cranfield University, Cranfield, MK43 0AL, United Kingdom; School of Biosciences, University of Nottingham, Nottingham, NG7 2RD, United Kingdom; Centre for Environmental Geochemistry, British Geological Survey, Keyworth, NG12 5GG, United Kingdom; Smithsonian Tropical Research Institute, Apartado, Balboa, Ancon, 0843-03092, Panama; Lancaster Environment Centre, Lancaster University, Lancaster, LA14YQ, United Kingdom
推荐引用方式 GB/T 7714	Girkin N.T.,Vane C.H.,Turner B.L.,et al. Root oxygen mitigates methane fluxes in tropical peatlands[J],2020,15(6).
APA	Girkin N.T.,Vane C.H.,Turner B.L.,Ostle N.J.,&Sjögersten S..(2020).Root oxygen mitigates methane fluxes in tropical peatlands.Environmental Research Letters,15(6).
MLA	Girkin N.T.,et al."Root oxygen mitigates methane fluxes in tropical peatlands".Environmental Research Letters 15.6(2020).