Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow

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	Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow
	Wang, Shiping 1,2,3,4; Duan, Jichuang 1,5; Xu, Guangping 6; Wang, Yanfen 5; Zhang, Zhenhua 1,5; Rui, Yichao 5; Luo, Caiyun 1; Xu, Burenbayin 1,5; Zhu, Xiaoxue 1,5; Chang, Xiaofeng 1,5; Cui, Xiaoyong 5; Niu, Haishan 5; Zhao, Xinquan 1; Wang, Wenying 7
	2012-11-01
发表期刊	ECOLOGY
ISSN	0012-9658
卷号	93 期号:11 页码:2365-2376
文章类型	Article
摘要	Uncertainty about the effects of warming and grazing on soil nitrogen (N) availability, species composition, and aboveground net primary production (ANPP) limits our ability to predict how global carbon sequestration will vary under future warming with grazing in alpine regions. Through a controlled asymmetrical warming (1.2/1.7 degrees C during daytime/nighttime) with a grazing experiment from 2006 to 2010 in an alpine meadow, we found that warming alone and moderate grazing did not significantly affect soil net N mineralization. Although plant species richness significantly decreased by 10% due to warming after 2008, we caution that this may be due to the transient occurrence or disappearance of some rare plant species in all treatments. Warming significantly increased graminoid cover, except in 2009, and legume cover after 2008, but reduced non-legume forb cover in the community. Grazing significantly decreased cover of graminoids and legumes before 2009 but increased forb cover in 2010. Warming significantly increased ANPP regardless of grazing, whereas grazing reduced the response of ANPP to warming. N addition did not affect ANPP in both warming and grazing treatments. Our findings suggest that soil N availability does not determine ANPP under simulated warming and that heavy grazing rather than warming causes degradation of the alpine meadows.; Uncertainty about the effects of warming and grazing on soil nitrogen (N) availability, species composition, and aboveground net primary production (ANPP) limits our ability to predict how global carbon sequestration will vary under future warming with grazing in alpine regions. Through a controlled asymmetrical warming (1.2/1.7 degrees C during daytime/nighttime) with a grazing experiment from 2006 to 2010 in an alpine meadow, we found that warming alone and moderate grazing did not significantly affect soil net N mineralization. Although plant species richness significantly decreased by 10% due to warming after 2008, we caution that this may be due to the transient occurrence or disappearance of some rare plant species in all treatments. Warming significantly increased graminoid cover, except in 2009, and legume cover after 2008, but reduced non-legume forb cover in the community. Grazing significantly decreased cover of graminoids and legumes before 2009 but increased forb cover in 2010. Warming significantly increased ANPP regardless of grazing, whereas grazing reduced the response of ANPP to warming. N addition did not affect ANPP in both warming and grazing treatments. Our findings suggest that soil N availability does not determine ANPP under simulated warming and that heavy grazing rather than warming causes degradation of the alpine meadows.
关键词	Alpine Meadow Global Warming Herbivore n Addition Plant Functional Group Primary Production Species Diversity Tibetan Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	PLANT COMMUNITY RESPONSES ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; ORGANIC NITROGEN ; ECOSYSTEM ; TUNDRA ; MINERALIZATION ; PRODUCTIVITY ; METAANALYSIS ; VEGETATION
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000310834900008
引用统计	被引频次：306[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/3592
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China 3.Univ Tibet, Naqu Ecol & Environm Observat & Res Stn, Naqu 852000, Peoples R China 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Naqu 852000, Peoples R China 5.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 6.Guangxi Zhuangzu Autonomous Reg Chinese Acad Sci, Guangxi Inst Bot, Guangxi 541006, Peoples R China 7.Qinghai Normal Univ, Coll Life & Geog Sci, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shiping,Duan, Jichuang,Xu, Guangping,et al. Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow[J]. ECOLOGY,2012,93(11):2365-2376.
APA	Wang, Shiping.,Duan, Jichuang.,Xu, Guangping.,Wang, Yanfen.,Zhang, Zhenhua.,...&Wang, Wenying.(2012).Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow.ECOLOGY,93(11),2365-2376.
MLA	Wang, Shiping,et al."Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow".ECOLOGY 93.11(2012):2365-2376.

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