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High microbial diversity stabilizes the responses of soil organic carbon decomposition to warming in the subsoil on the Tibetan Plateau

文献类型：期刊论文

作者Xu, Meng1; Li, Xiaoliang2; Kuyper, Thomas W.3; Xu, Ming1; Li, Xiaolin4; Zhang, Junling4
刊名GLOBAL CHANGE BIOLOGY
出版日期2021-02-27
页码15
ISSN号1354-1013
关键词alpine ecosystem community composition elevation gradient global warming microbial diversity soil organic carbon decomposition
DOI10.1111/gcb.15553
通讯作者Xu, Meng(xumeng@igsnrr.ac.cn) ; Zhang, Junling(junlingz@cau.edu.cn)
英文摘要Soil microbes are directly involved in soil organic carbon (SOC) decomposition, yet the importance of microbial biodiversity in regulating the temperature sensitivity of SOC decomposition remains elusive, particularly in alpine regions where climate change is predicted to strongly affect SOC dynamics and ecosystem stability. Here we collected topsoil and subsoil samples along an elevational gradient on the southeastern Tibetan Plateau to explore the temperature sensitivity (Q(10)) of SOC decomposition in relation to changes in microbial communities. Specifically, we tested whether the decomposition of SOC would be more sensitive to warming when microbial diversity is low. The estimated Q(10) value ranged from 1.28 to 1.68, and 1.80 to 2.10 in the topsoil and subsoil, respectively. The highest Q(10) value was observed at the lowest altitude of forests in the topsoil, and at the highest altitude of alpine meadow in the subsoil. Variations in Q(10) were closely related to changes in microbial properties. In the topsoil the ratio of gram-positive to gram-negative bacteria (G+:G-) was the predominant factor associated with the altitudinal variations in Q(10). In the subsoil, SOC decomposition showed more resilience to warming when the diversity of soil bacteria (both whole community and major groups) and fungi was higher. Our results partly support the positive biodiversity-ecosystem stability hypothesis. Structural equation modeling further indicates that variations in Q(10) in the subsoil were directly related to changes in microbial diversity and community composition, which were affected by soil pH. Collectively our results provide compelling evidence that microbial biodiversity plays an important role in stabilizing SOC decomposition in the subsoil of alpine montane ecosystems. Conservation of belowground biodiversity is therefore of great importance in maintaining the stability of ecosystem processes under climate change in high-elevation regions of the Tibetan Plateau.
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23080302] ; National Natural Science Foundation of China[31702002] ; National Natural Science Foundation of China[31770558] ; National Natural Science Foundation of China[31872182] ; National Natural Science Foundation of China[41907036] ; National Natural Science Foundation of China[41977041]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
出版者WILEY
WOS记录号WOS:000622415500001
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/160559]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Meng; Zhang, Junling
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab Crop Gene Resources & Germplasm Enhanceme, Minist Agr, Danzhou, Hainan, Peoples R China
3.Wageningen Univ, Soil Biol Grp, Wageningen, Netherlands
4.China Agr Univ, Coll Resources & Environm Sci, Ctr Resources Environm & Food Secur, Key Lab Plant Soil Interact,Minist Educ, Beijing 100193, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Meng,Li, Xiaoliang,Kuyper, Thomas W.,et al. High microbial diversity stabilizes the responses of soil organic carbon decomposition to warming in the subsoil on the Tibetan Plateau[J]. GLOBAL CHANGE BIOLOGY,2021:15.
APA Xu, Meng,Li, Xiaoliang,Kuyper, Thomas W.,Xu, Ming,Li, Xiaolin,&Zhang, Junling.(2021).High microbial diversity stabilizes the responses of soil organic carbon decomposition to warming in the subsoil on the Tibetan Plateau.GLOBAL CHANGE BIOLOGY,15.
MLA Xu, Meng,et al."High microbial diversity stabilizes the responses of soil organic carbon decomposition to warming in the subsoil on the Tibetan Plateau".GLOBAL CHANGE BIOLOGY (2021):15.

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来源：地理科学与资源研究所

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