Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau

doi:10.1071/RJ14127

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 气候变化研究室

	Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau
	Ganjurjav, Hasbagan 1,2; Duan, Min-jie 3; Wan, Yun-fan 1,2; Zhang, Wei-na 1,2; Gao, Qing-zhu 1,2; Li, Yue 1,2; Jiangcun, Wang-zha 4; Danjiu, Luo-bu 4; Guo, Hong-bao 4
刊名	RANGELAND JOURNAL
	2015
卷号	37 期号:4 页码:389-397
关键词	alpine steppe productivity Qinghai-Tibetan Plateau sheep grazing species diversity
ISSN号	1036-9872
DOI	10.1071/RJ14127
通讯作者	Ganjurjav, Hasbagan
英文摘要	Grazing by large herbivores may have a strong impact on plant diversity and productivity, but the effects are expected to vary with grazing pressure. The changes in productivity and species diversity of Stipa purpurea-dominated semi-arid alpine steppe grassland were measured under four different stocking rates of Tibetan sheep [no grazing, light (2.4 sheep units ha(-1)), moderate (3.6 sheep units ha(-1)), and heavy (6.0 sheep units ha(-1)) grazing] in a 5-year (2006-2010) grazing experiment on the Qinghai-Tibetan Plateau, China. Herbage mass and aboveground net primary productivity of alpine steppe declined significantly with increasing stocking rate (P < 0.05). Over the 5 years of the experiment, the proportion of forbs and sedges increased significantly under light and moderate grazing; the proportion of grasses decreased significantly, whereas the proportion of S. purpurea did not change compared with the no grazing treatment. Species diversity was highest under moderate grazing and was significantly higher than the no grazing treatment in 2 years (2008 and 2010). Moderate grazing enhanced the species diversity of the plant community due to an increase in the proportion of forbs. There were significant positive linear correlations between herbage mass and species diversity under no and light grazing. Species diversity was not related to productivity under moderate and heavy grazing. In conclusion, grazing by sheep reduced plant productivity; plant diversity increased under low and moderate grazing, and was as a result of changes in the composition of the plant community of a semi-arid alpine steppe.
学科主题	Ecology
语种	英语
出版者	CSIRO PUBLISHING
WOS记录号	WOS:000358664300006
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19783]
专题	农业环境与可持续发展研究所_气候变化研究室
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 2.Minist Agr, Key Lab Agroenvironm & Climate Change, Beijing 100081, Peoples R China 3.Beijing Inst Landscape Architecture, Beijing 100102, Peoples R China 4.Nagqu Agr & Anim Husb Bur, Nagqu 852100, Tibet Autonomou, Peoples R China
推荐引用方式 GB/T 7714	Ganjurjav, Hasbagan,Duan, Min-jie,Wan, Yun-fan,et al. Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau[J]. RANGELAND JOURNAL,2015,37(4):389-397.
APA	Ganjurjav, Hasbagan.,Duan, Min-jie.,Wan, Yun-fan.,Zhang, Wei-na.,Gao, Qing-zhu.,...&Guo, Hong-bao.(2015).Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau.RANGELAND JOURNAL,37(4),389-397.
MLA	Ganjurjav, Hasbagan,et al."Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau".RANGELAND JOURNAL 37.4(2015):389-397.