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DOI	10.1111/gcb.12065
	Responses of the functional structure of soil microbial community to livestock grazing in the Tibetan alpine grassland
	Yang, Yunfeng; Wu, Linwei; Lin, Qiaoyan; Yuan, Mengting; Xu, Depeng; Yu, Hao; Hu, Yigang; Duan, Jichuang; Li, Xiangzhen; He, Zhili; Xue, Kai; van Nostrand, Joy; Wang, Shiping; Zhou, Jizhong
通讯作者	Yang, YF (通讯作者)
发表日期	2013
ISSN	1354-1013
EISSN	1365-2486
起始页码	637
结束页码	648
卷号	19 期号:2
英文摘要	Microbes play key roles in various biogeochemical processes, including carbon (C) and nitrogen (N) cycling. However, changes of microbial community at the functional gene level by livestock grazing, which is a global land-use activity, remain unclear. Here we use a functional gene array, GeoChip 4.0, to examine the effects of free livestock grazing on the microbial community at an experimental site of Tibet, a region known to be very sensitive to anthropogenic perturbation and global warming. Our results showed that grazing changed microbial community functional structure, in addition to aboveground vegetation and soil geochemical properties. Further statistical tests showed that microbial community functional structures were closely correlated with environmental variables, and variations in microbial community functional structures were mainly controlled by aboveground vegetation, soil C/N ratio, and NH4+-N. In-depth examination of N cycling genes showed that abundances of N mineralization and nitrification genes were increased at grazed sites, but denitrification and N-reduction genes were decreased, suggesting that functional potentials of relevant bioprocesses were changed. Meanwhile, abundances of genes involved in methane cycling, C fixation, and degradation were decreased, which might be caused by vegetation removal and hence decrease in litter accumulation at grazed sites. In contrast, abundances of virulence, stress, and antibiotics resistance genes were increased because of the presence of livestock. In conclusion, these results indicated that soil microbial community functional structure was very sensitive to the impact of livestock grazing and revealed microbial functional potentials in regulating soil N and C cycling, supporting the necessity to include microbial components in evaluating the consequence of land-use and/or climate changes.
关键词	16S RIBOSOMAL-RNA SEA OIL PLUME NITROUS-OXIDE LAND-USE VEGETATION DYNAMICS ECOSYSTEM FUNCTION INNER-MONGOLIA DIVERSITY BIODIVERSITY PLATEAU
英文关键词	climate change; gene diversity; microbial community; summer grazing; Tibetan alpine grassland
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000314219200026
来源期刊	GLOBAL CHANGE BIOLOGY
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/258242
推荐引用方式 GB/T 7714	Yang, Yunfeng,Wu, Linwei,Lin, Qiaoyan,et al. Responses of the functional structure of soil microbial community to livestock grazing in the Tibetan alpine grassland[J]. 中国科学院青藏高原研究所,2013,19(2).
APA	Yang, Yunfeng.,Wu, Linwei.,Lin, Qiaoyan.,Yuan, Mengting.,Xu, Depeng.,...&Zhou, Jizhong.(2013).Responses of the functional structure of soil microbial community to livestock grazing in the Tibetan alpine grassland.GLOBAL CHANGE BIOLOGY,19(2).
MLA	Yang, Yunfeng,et al."Responses of the functional structure of soil microbial community to livestock grazing in the Tibetan alpine grassland".GLOBAL CHANGE BIOLOGY 19.2(2013).