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Change of methane production pathway with sediment depth in a lake on the Tibetan plateau
Liu, YQ (Liu, Yongqin)1; Conrad, R (Conrad, Ralf)2; Yao, TD (Yao, Tandong)1; Gleixner, G (Gleixner, Gerd)3; Claus, P (Claus, Peter)2; Liu, YQ
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
2017
Volume474Issue:0Pages:279-286
DOI10.1016/j.palaeo.2016.06.021
AbstractMethane production is the terminal step in the degradation of organic matter in most anoxic lake sediments. It has been suggested that CH4 production in lake sediments is dominated by hydrogenotrophic methanogenesis, especially in deeper layers. We investigated the vertical sediment profile from the surface to 50 cm depth in the sediment of Bangong Co, an oligotrophic high altitude lake on the Tibetan plateau. We measured CH4 production, stable carbon isotopefractionation and the archaeal community structure. We found that the methane production rates, the acetate concentrations and the numbers of bacteria and archaea strongly decreased with sediment depth. The enrichment factor (epsilon) for hydrogenotrophic methanogenesis also decreased with depth, while delta C-13 of acetate stayed fairly constant. The contribution of hydrogenotrophic methanogenesis to total CH4 production increased with depth from similar to 36% to 100%. Analysis of terminal restriction fragment polymorphism (T-RFLP) of archaeal 16S rRNA genes showed that the relative abundance of aceticlastic (Methanosaetaceae) methanogens also decreased with depth disappearing completely at 50 cm depth. Our study firstly showed that the methanogenic pathway and the methanogenic archaeal community systematically changed with sediment depth in a high altitude lake, probably controlled by the availability of easily degradable organic matter. (C) 2016 Elsevier B.V. All rights reserved.
Subject Area普通生物学
WOS IDWOS:000399261500022
Language英语
Indexed BySCI
KeywordCARBON-ISOTOPE FRACTIONATION ARCHAEAL COMMUNITY STRUCTURE STABLE-ISOTOPE EUTROPHIC LAKE PROFUNDAL SEDIMENT ACETOCLASTIC METHANOGENESIS WETLAND SOILS TEMPERATURE HYDROGEN BACTERIA
WOS Research AreaPhysical Geography; Geology; Paleontology
WOS SubjectGeography, Physical; Geosciences, Multidisciplinary; Paleontology ; Physical Geography; Geology; Paleontology
Cooperation Status国际
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8243
Collection图书馆
Corresponding AuthorLiu, YQ
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China.
2.Max Planck Inst Terr Microbiol, D-35043 Marburg, Germany.
3.Max Planck Inst Biogeochem, D-07745 Jena, Germany.
Recommended Citation
GB/T 7714
Liu, YQ ,Conrad, R ,Yao, TD ,et al. Change of methane production pathway with sediment depth in a lake on the Tibetan plateau[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2017,474(0):279-286.
APA Liu, YQ ,Conrad, R ,Yao, TD ,Gleixner, G ,Claus, P ,&Liu, YQ.(2017).Change of methane production pathway with sediment depth in a lake on the Tibetan plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,474(0),279-286.
MLA Liu, YQ ,et al."Change of methane production pathway with sediment depth in a lake on the Tibetan plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 474.0(2017):279-286.
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