Change of methane production pathway with sediment depth in a lake on the Tibetan plateau
文献类型：期刊论文
| 作者 | Yao, TD (Yao, Tandong)2; Liu, YQ (Liu, Yongqin)2; Conrad, R (Conrad, Ralf)1; Gleixner, G (Gleixner, Gerd)3; Claus, P (Claus, Peter)1; Liu, YQ |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2017 |
| 卷号 | 474期号:0页码:279-286 |
| 关键词 | CARBON-ISOTOPE FRACTIONATION ARCHAEAL COMMUNITY STRUCTURE STABLE-ISOTOPE EUTROPHIC LAKE PROFUNDAL SEDIMENT ACETOCLASTIC METHANOGENESIS WETLAND SOILS TEMPERATURE HYDROGEN BACTERIA |
| DOI | 10.1016/j.palaeo.2016.06.021 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | 普通生物学 |
| WOS研究方向 | Physical Geography; Geology; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000399261500022 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8243]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Liu, YQ |
| 作者单位 | 1.Max Planck Inst Terr Microbiol, D-35043 Marburg, Germany. 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China. 3.Max Planck Inst Biogeochem, D-07745 Jena, Germany. |
| 推荐引用方式 GB/T 7714 | Yao, TD ,Liu, YQ ,Conrad, R ,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 | Yao, TD ,Liu, YQ ,Conrad, R ,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 | Yao, TD ,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. |
入库方式： OAI收割
来源：青藏高原研究所
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