Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86183
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dc.contributor.authorJia, Shihongen
dc.contributor.authorWang, Xugaoen
dc.contributor.authorYuan, Zuoqiangen
dc.contributor.authorLin, Feien
dc.contributor.authorYe, Jien
dc.contributor.authorHao, Zhanqingen
dc.contributor.authorLuskin, Matthew Scotten
dc.date.accessioned2019-09-04T02:27:44Zen
dc.date.accessioned2019-12-06T16:17:31Z-
dc.date.available2019-09-04T02:27:44Zen
dc.date.available2019-12-06T16:17:31Z-
dc.date.issued2018en
dc.identifier.citationJia, S., Wang, X., Yuan, Z., Lin, F., Ye, J., Hao, Z., & Luskin, M. S. (2018). Global signal of top-down control of terrestrial plant communities by herbivores. Proceedings of the National Academy of Sciences, 115(24), 6237-6242. doi:10.1073/pnas.1707984115en
dc.identifier.issn0027-8424en
dc.identifier.urihttps://hdl.handle.net/10356/86183-
dc.description.abstractThe 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.en
dc.format.extent6 p.en
dc.language.isoenen
dc.relation.ispartofseriesProceedings of the National Academy of Sciencesen
dc.rights© 2018 The Author(s). Published by PNAS. This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).en
dc.subjectMeta-analysisen
dc.subjectSpecies Diversityen
dc.subjectScience::Biological sciencesen
dc.titleGlobal signal of top-down control of terrestrial plant communities by herbivoresen
dc.typeJournal Articleen
dc.contributor.schoolAsian School of the Environmenten
dc.identifier.doi10.1073/pnas.1707984115en
dc.description.versionPublished versionen
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