DOI: 10.1007/s10533-014-0026-7
Scopus记录号: 2-s2.0-85028166371
论文题名: Methane fluxes and the functional groups of methanotrophs and methanogens in a young Arctic landscape on Disko Island, West Greenland
作者: Christiansen J.R. ; Romero A.J.B. ; Jørgensen N.O.G. ; Glaring M.A. ; Jørgensen C.J. ; Berg L.K. ; Elberling B.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122, 期: 1 起始页码: 15
结束页码: 33
语种: 英语
英文关键词: Arctic
; Methane fluxes
; Methanogens
; Methanotrophs
; Pyrosequencing
; Soil
Scopus关键词: abundance
; arctic environment
; carbon flux
; community composition
; functional group
; methane
; methanogenesis
; methanotrophy
; microbial ecology
; soil microorganism
; Arctic
; Disko Island
; Greenland
; Greenland
; Methylococcaceae
; Methylocystaceae
英文摘要: Arctic soils are known to be important methane CH4)consumers and sources. This study integrates in situ fluxes of CH4between upland and wetland soils with potential rates of CH4oxidation and production as well as abundance and diversity of the methanotrophs and methanogens measured with pyrosequencing of 16S DNA and rRNA fragments in soil and permafrost layers. Here, the spatial patterns of in situ CH4fluxes for a 2,000 years old Arctic landscape in West Greenland reveal similar CH4uptake rates (−4 ± 0.3 μmol m−2h−1) as in other Arctic sites, but lower CH4emissions (14 ± 1.5 μmol m−2h−1)at wetland sites compared to other Arctic wetlands. Potential CH4oxidation was similar for upland and wetland soils, but the wetter soils produced more CH4in active and permafrost layers. Accordingly, the abundance of methanogenic archaea was highest in wetland soils. The methanotrophic community also differed between upland and wetland soils, with predominant activity of Type II methanotrophs in the active layer for upland soils, but only Type I methanotrophs for the wetland. In the permafrost of upland and wetland soils, activity of the methanotrophs belonging to Type I and Type II as well as methanogens were detected. This study indicates that the magnitude of CH4oxidation and the direction of the flux, i.e. uptake or emission, are linked to different methanotrophic communities in upland and wetland soils. Also, the observed link between production/consumption rates and the microbial abundance and activity indicates that the age of an Arctic landscape is not important for the CH4consumption but can be very important for CH4production. Considering the prevalence of dry landscapes and contrasting ages of high Arctic soils, our results highlight that well-drained soils should not be overlooked as an important component of Arctic net CH4budget. © 2014, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83553
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, Copenhagen, Denmark; Department of Forest and Conservation Science, University of British Columbia, Main Mall 2424, Vancouver, BC, Canada; Department of Biology and Geology, Universidad de Almería, Carretera Sacramento s/n, La Cañada de San Urbano, Almería, Spain; Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg, Denmark
Recommended Citation:
Christiansen J.R.,Romero A.J.B.,Jørgensen N.O.G.,et al. Methane fluxes and the functional groups of methanotrophs and methanogens in a young Arctic landscape on Disko Island, West Greenland[J]. Biogeochemistry,2015-01-01,122(1)