气候变化领域集成服务门户(CCPortal): Increased precipitation accelerates soil organic matter turnover associated with microbial community composition in topsoil of alpine grassland on the eastern Tibetan Plateau

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DOI	10.1139/cjm-2017-0157
	Increased precipitation accelerates soil organic matter turnover associated with microbial community composition in topsoil of alpine grassland on the eastern Tibetan Plateau
	Han, Conghai; Wang, Zongli; Si, Guicai; Lei, Tianzhu; Yuan, Yanli; Zhang, Gengxin
通讯作者	Zhang, GX (通讯作者)
发表日期	2017
ISSN	0008-4166
EISSN	1480-3275
起始页码	811
结束页码	821
卷号	63 期号:10
英文摘要	Large quantities of carbon are stored in alpine grassland of the Tibetan Plateau, which is extremely sensitive to climate change. However, it remains unclear whether soil organic matter (SOM) in different layers responds to climate change analogously, and whether microbial communities play vital roles in SOM turnover of topsoil. In this study we measured and collected SOM turnover by the C-14 method in alpine grassland to test climatic effects on SOM turnover in soil profiles. Edaphic properties and microbial communities in the northwestern Qinghai Lake were investigated to explore microbial influence on SOM turnover. SOM turnover in surface soil (0-10 cm) was more sensitive to precipitation than that in subsurface layers (10-40 cm). Precipitation also imposed stronger effects on the composition of microbial communities in the surface layer than that in deeper soil. At the 5-10 cm depth, the SOM turnover rate was positively associated with the bacteria/fungi biomass ratio and the relative abundance of Acidobacteria, both of which are related to precipitation. Partial correlation analysis suggested that increased precipitation could accelerate the SOM turnover rate in topsoil by structuring soil microbial communities. Conversely, carbon stored in deep soil would be barely affected by climate change. Our results provide valuable insights into the dynamics and storage of SOM in alpine grasslands under future climate scenarios.
关键词	CARBON TURNOVER CLIMATE-CHANGE LITTER DECOMPOSITION LOESS PLATEAU CHINA TEMPERATURE VEGETATION MINERALIZATION (CO2)-C-14 BACTERIAL
英文关键词	alpine grassland; soil profile; SOM turnover; precipitation; microbial community
语种	英语
WOS研究方向	Biochemistry & Molecular Biology ; Biotechnology & Applied Microbiology ; Immunology ; Microbiology
WOS类目	Biochemistry & Molecular Biology ; Biotechnology & Applied Microbiology ; Immunology ; Microbiology
WOS记录号	WOS:000412174100001
来源期刊	CANADIAN JOURNAL OF MICROBIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259009
推荐引用方式 GB/T 7714	Han, Conghai,Wang, Zongli,Si, Guicai,et al. Increased precipitation accelerates soil organic matter turnover associated with microbial community composition in topsoil of alpine grassland on the eastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2017,63(10).
APA	Han, Conghai,Wang, Zongli,Si, Guicai,Lei, Tianzhu,Yuan, Yanli,&Zhang, Gengxin.(2017).Increased precipitation accelerates soil organic matter turnover associated with microbial community composition in topsoil of alpine grassland on the eastern Tibetan Plateau.CANADIAN JOURNAL OF MICROBIOLOGY,63(10).
MLA	Han, Conghai,et al."Increased precipitation accelerates soil organic matter turnover associated with microbial community composition in topsoil of alpine grassland on the eastern Tibetan Plateau".CANADIAN JOURNAL OF MICROBIOLOGY 63.10(2017).