Global signal of top-down control of terrestrial plant communities by herbivores

doi:10.1073/pnas.1707984115

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	Global signal of top-down control of terrestrial plant communities by herbivores
	Jia, Shihong 1,2; Wang, Xugao 1; Yuan, Zuoqiang 1; Lin, Fei 1; Ye, Ji 1; Hao, Zhanqing 1; Luskin, Matthew Scott 3,4
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2018-06-12
卷号	115 期号:24 页码:6237-6242
关键词	Meta-analysis Species Diversity Density-dependent Predation Experimental Animal Exclusion Ecological Cascades
ISSN号	0027-8424
DOI	10.1073/pnas.1707984115
英文摘要	The theory of "top-down" ecological regulation predicts that herbivory suppresses plant abundance, biomass, and survival but increases diversity through the disproportionate consumption of dominant species, which inhibits competitive exclusion. To date, these outcomes have been clear in aquatic ecosystems but not on land. We explicate this discrepancy using a meta-analysis of experimental results from 123 native animal exclusions in natural terrestrial ecosystems (623 pairwise comparisons). Consistent with top-down predictions, we found that herbivores significantly reduced plant abundance, biomass, survival, and reproduction (all P < 0.01) and increased species evenness but not richness (P = 0.06 and P = 0.59, respectively). However, when examining patterns in the strength of top-down effects, with few exceptions, we were unable to detect significantly different effect sizes among biomes, based on local site characteristics (climate or productivity) or study characteristics (study duration or exclosure size). The positive effects on diversity were only significant in studies excluding large animals or located in temperate grasslands. The results demonstrate that top-down regulation by herbivores is a pervasive process shaping terrestrial plant communities at the global scale, but its strength is highly site specific and not predicted by basic site conditions. We suggest that including herbivore densities as a covariate in future exclosure studies will facilitate the discovery of unresolved macroecology trends in the strength of herbivore-plant interactions.
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATL ACAD SCIENCES
WOS记录号	WOS:000434933400052
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/106592]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
通讯作者	Wang, Xugao; Luskin, Matthew Scott
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Smithsonian Trop Res Inst, Smithsonian Inst Global Earth Observ, Ctr Trop Forest Sci, Washington, DC 20012 USA 4.Nanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore
推荐引用方式 GB/T 7714	Jia, Shihong,Wang, Xugao,Yuan, Zuoqiang,et al. Global signal of top-down control of terrestrial plant communities by herbivores[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(24):6237-6242.
APA	Jia, Shihong.,Wang, Xugao.,Yuan, Zuoqiang.,Lin, Fei.,Ye, Ji.,...&Luskin, Matthew Scott.(2018).Global signal of top-down control of terrestrial plant communities by herbivores.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(24),6237-6242.
MLA	Jia, Shihong,et al."Global signal of top-down control of terrestrial plant communities by herbivores".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.24(2018):6237-6242.