RCEES OpenIR  > 中国科学院环境生物技术重点实验室
The acetotrophic pathway dominates methane production in Zoige alpine wetland coexisting with hydrogenotrophic pathway
Zhang, Yanfen; Ma, Anzhou; Zhuang, Guoqiang; Zhuang, Xuliang
2019-06-24
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume9Pages:-
AbstractAs a typical alpine wetland on the Tibetan Plateau, the Zoige wetland processes a large carbon stock and is a hotspot of methane emission. To date, many studies have investigated the methane flux in this wetland; however, the research on the source of methane in the soils of Zoige wetland is not clear enough. In this study, we determined the dynamic characteristics of the stable carbon isotopes during the methanogenesis of Zoige wetland soil and the corresponding microbial changes. The results showed that the delta(CH4)-C-13 varied between -19.86 parts per thousand and -28.32 parts per thousand and the alpha(C) ranged from 1.0029 to 1.0104 in the methanogenesis process, which suggests the dominance of acetotrophic methanogenesis. And among the increased methanogens, acetotrophic methanogens multiplied more obviously than hydrogenotrophic menthanogens. In addition, the results of structural equation models showed that the variations in stable carbon isotopes during the process were mainly affected by acetotrophic methanogens. Although the acetotrophic pathway was dominate, the varied isotope characteristics, increased methanogens and ratio of carbon dioxide to methane all showed that hydrogenotrophic and acetotrophic methanogenesis coexisted in the Zoige wetland. Overall, our study provided a detailed and definitive information to the source of methane in the soil of the Zoige wetland and laid a foundation of mechanism to the research of greenhouse gas in this alpine wetland.
Department中国科学院环境生物技术重点实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43404
Collection中国科学院环境生物技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yanfen,Ma, Anzhou,Zhuang, Guoqiang,et al. The acetotrophic pathway dominates methane production in Zoige alpine wetland coexisting with hydrogenotrophic pathway[J]. SCIENTIFIC REPORTS,2019,9:-.
APA Zhang, Yanfen,Ma, Anzhou,Zhuang, Guoqiang,&Zhuang, Xuliang.(2019).The acetotrophic pathway dominates methane production in Zoige alpine wetland coexisting with hydrogenotrophic pathway.SCIENTIFIC REPORTS,9,-.
MLA Zhang, Yanfen,et al."The acetotrophic pathway dominates methane production in Zoige alpine wetland coexisting with hydrogenotrophic pathway".SCIENTIFIC REPORTS 9(2019):-.
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