DOI: 10.1029/2011GB004238
Scopus记录号: 2-s2.0-84881089394
论文题名: Response of methanogenic archaea to Late Pleistocene and Holocene climate changes in the Siberian Arctic
作者: Bischoff J ; , Mangelsdorf K ; , Gattinger A ; , Schloter M ; , Kurchatova A ; N ; , Herzschuh U ; , Wagner D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 305
结束页码: 317
语种: 英语
英文关键词: climate change
; lipid biomarker
; methane
; methanogenic archaea
; permafrost
Scopus关键词: Genetic fingerprints
; Holocene climate change
; Lipid biomarkers
; Methane concentrations
; Methanogenic activity
; Methanogenic archaea
; Methanogenic community
; Temperature changes
; Deposits
; Ethers
; Experiments
; Genes
; Glycerol
; Methanation
; Methane
; Methanogens
; Permafrost
; Phospholipids
; RNA
; Sediments
; Soils
; Climate change
; biomarker
; climate variation
; concentration (composition)
; Holocene
; lipid
; methane
; methanogenesis
; paleoclimate
; permafrost
; Pleistocene
; prokaryote
; Arctic
; Kurungnakh Island
; Lena Delta
; Russian Federation
; Sakha
; Siberia
英文摘要: In order to investigate the link between the methane dynamics in permafrost deposits and climate changes in the past, we studied the abundance, composition, and methane production of methanogenic communities in Late Pleistocene and Holocene sediments of the Siberian Arctic. We detected intervals of increased methane concentrations in Late Pleistocene and Holocene deposits along a 42 ka old permafrost sequence from Kurungnakh Island in the Lena Delta (northeast Siberia). Increased amounts of archaeal life markers (intact phospholipid ethers) and a high variety in genetic fingerprints detected by 16S ribosomal ribonucleic acid gene analyses of methanogenic archaea suggest presently living and presumably active methanogenic archaea in distinct layers predominantly in Holocene deposits, but also in deep frozen ground at 17 m depth. Potential methanogenic activity was confirmed by incubation experiments. By comparing methane concentrations, microbial incubation experiments, gene analysis of methanogens, and microbial life markers (intact phospholipid esters and ethers) to already partly degraded membrane lipids, such as archaeol and isoprenoid glycerol dialkyl glycerol tetraethers, we demonstrated that archaeol likely represents a signal of past methanogenic archaea. The archaeol signal was used to reconstruct the response of methanogenic communities to past temperature changes in the Siberian Arctic, and the data suggest higher methane emissions occurred during warm periods, particularly during an interval in the Late Pleistocene and during the Holocene. This new data on present and past methanogenic communities in the Siberian terrestrial permafrost imply that these microorganisms will respond to the predicted future temperature rise in the Arctic with increasing methane production, as demonstrated in previous warmer periods. ©2012. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77621
Appears in Collections: 气候变化事实与影响
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作者单位: Research Department Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany; Helmholtz Center Potsdam, GFZ German Research Center for Geosciences, Section 4.3 Organic Geochemistry, Potsdam, Germany; Helmholtz Zentrum München, Research Unit for Environmental Genomics, Oberschleissheim, Germany; Tyumen State Oil and Gas University, Tyumen, Russian Federation; Newcastle University, School of Civil Engineering and Geosciences, Newcastle Upon Tyne, NE1 7RU, United Kingdom; Research Institute of Organic Agriculture (FiBL), Soil Sciences Division, Frick, Switzerland; Helmholtz Center Potsdam, GFZ German Research Center for Geosciences, Section 4.5 Geomicrobiology, Potsdam, Germany
Recommended Citation:
Bischoff J,, Mangelsdorf K,, Gattinger A,et al. Response of methanogenic archaea to Late Pleistocene and Holocene climate changes in the Siberian Arctic[J]. Global Biogeochemical Cycles,2013-01-01,27(2)