Effects of Different Grazing Intensities on Grassland Production in China: A Meta-Analysis

doi:10.1371/journal.pone.0081466

	Effects of Different Grazing Intensities on Grassland Production in China: A Meta-Analysis
	Yan, Liang 2; Zhou, Guangsheng 1; Zhang, Feng
	2013
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	8 期号:12
摘要	Background: Grazing is one of the main grassland disturbances in China, and it is essential to quantitatively evaluate the effects of different grazing intensities on grassland production for grassland carbon budget and sustainable use. Methods: A meta-analysis was conducted to reveal general response patterns of grassland production to grazing in China. We used weighted log response ratio to assess the effect size, and 95% confidence intervals to give a sense of the precision of the estimate. Grazing effects were estimated as a percentage change relative to control (%). Results: A total of 48 studies, including 251 data sets, were included in the meta-analysis. Grazing significantly decreased total biomass by 58.34% (95% CI: -72.04%similar to-37.94%, CI: Confidence Interval), increased root/shoot ratio by 30.58% and decreased litter by 51.41% (95% CI: -63.31%similar to-35.64%). Aboveground biomass and belowground biomass decreased significantly by 42.77% (95% CI: -48.88%similar to-35.93%) and 23.13% (95% CI: -39.61%similar to-2.17%), respectively. However, biomass responses were dependent on grazing intensity and environmental conditions. Percentage changes in aboveground biomass to grazing showed a quadratic relationship with precipitation in light grazing intensity treatment and a linear relationship in moderate and heavy grazing intensity treatment, but did not change with temperature. Grazing effects on belowground biomass did not change with precipitation or temperature. Compared to the global average value, grazing had greater negative effects on grassland production in China. Conclusions: Grazing has negative effects on grassland biomass and the grazing effects change with environmental conditions and grazing intensity, therefore flexible rangeland management tactics that suit local circumstances are necessary to take into consideration for balancing the demand of grassland utilization and conservation.
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0081466
收录类别	SCI
语种	英语
WOS关键词	NET PRIMARY PRODUCTION ; BELOW-GROUND BIOMASS ; SOIL ORGANIC-MATTER ; LITTER QUALITY ; INNER-MONGOLIA ; CARBON STOCKS ; RESPONSES ; ECOSYSTEMS ; ALLOCATION ; DYNAMICS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000328566700038
出版者	PUBLIC LIBRARY SCIENCE
文献子类	Article
出版地	SAN FRANCISCO
资助机构	State Key Development Program of Basic Research ; Strategic Priority Research Program - Climate Change: Carbon Budget and Related Issues of the Chinese Academy of Sciences(Chinese Academy of Sciences)
作品OA属性	Green Submitted, Green Published, gold
引用统计	被引频次：103[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27809
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Chinese Acad Meteorol Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yan, Liang,Zhou, Guangsheng,Zhang, Feng. Effects of Different Grazing Intensities on Grassland Production in China: A Meta-Analysis[J]. PLOS ONE,2013,8(12).
APA	Yan, Liang,Zhou, Guangsheng,&Zhang, Feng.(2013).Effects of Different Grazing Intensities on Grassland Production in China: A Meta-Analysis.PLOS ONE,8(12).
MLA	Yan, Liang,et al."Effects of Different Grazing Intensities on Grassland Production in China: A Meta-Analysis".PLOS ONE 8.12(2013).

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