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Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow
Wang, Shiping1,2,3,4; Duan, Jichuang1,5; Xu, Guangping6; Wang, Yanfen5; Zhang, Zhenhua1,5; Rui, Yichao5; Luo, Caiyun1; Xu, Burenbayin1,5; Zhu, Xiaoxue1,5; Chang, Xiaofeng1,5; Cui, Xiaoyong5; Niu, Haishan5; Zhao, Xinquan1; Wang, Wenying7
2012-11-01
Source PublicationECOLOGY
ISSN0012-9658
Volume93Issue:11Pages:2365-2376
SubtypeArticle
AbstractUncertainty 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.
KeywordAlpine Meadow Global Warming Herbivore n Addition Plant Functional Group Primary Production Species Diversity Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordPLANT COMMUNITY RESPONSES ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; ORGANIC NITROGEN ; ECOSYSTEM ; TUNDRA ; MINERALIZATION ; PRODUCTIVITY ; METAANALYSIS ; VEGETATION
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology
WOS IDWOS:000310834900008
Citation statistics
Cited Times:155[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/3592
Collection中国科学院西北高原生物研究所
Affiliation1.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
Recommended Citation
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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