| 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 Publication | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 2017 | |
| Volume | 474Issue:0Pages:279-286 |
| DOI | 10.1016/j.palaeo.2016.06.021 |
| Abstract | Methane 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 ID | WOS:000399261500022 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | CARBON-ISOTOPE FRACTIONATION ARCHAEAL COMMUNITY STRUCTURE STABLE-ISOTOPE EUTROPHIC LAKE PROFUNDAL SEDIMENT ACETOCLASTIC METHANOGENESIS WETLAND SOILS TEMPERATURE HYDROGEN BACTERIA |
| WOS Research Area | Physical Geography; Geology; Paleontology |
| WOS Subject | Geography, Physical; Geosciences, Multidisciplinary; Paleontology ; Physical Geography; Geology; Paleontology |
| Cooperation Status | 国际 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8243 |
| Collection | 图书馆 |
| Corresponding Author | Liu, YQ |
| Affiliation | 1.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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.474 279-286 2017.p（800KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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