气候变化领域集成服务门户(CCPortal): Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri

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DOI	10.1073/pnas.1708436115
	Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri
	Louthan A.M.; Pringle R.M.; Goheen J.R.; Palmer T.M.; Morris W.F.; Doak D.F.
发表日期	2018
ISSN	0027-8424
起始页码	543
结束页码	548
卷号	115 期号:3
英文摘要	Predicting howspecies' abundances and rangeswill shift in response to climate change requires a mechanistic understanding of how multiple factors interact to limit population growth. Both abiotic stress and species interactions can limit populations and potentially set range boundaries, but we have a poor understanding of when and where each is most critical. A commonly cited hypothesis, first proposed by Darwin, posits that abiotic factors (e.g., temperature, precipitation) are stronger determinants of range boundaries in apparently abiotically stressful areas ("stress" indicates abiotic factors that reduce population growth), including desert, polar, or highelevation environments, whereas species interactions (e.g., herbivory, competition) play a stronger role in apparently less stressful environments. We tested a core tenet of this hypothesis-that population growth rate is more strongly affected by species interactions in less stressful areas-using experimental manipulations of species interactions affecting a common herbaceous plant, Hibiscus meyeri (Malvaceae), across an aridity gradient in a semiarid African savanna. Population growth was more strongly affected by four distinct species interactions (competition with herbaceous and shrubby neighbors, herbivory, and pollination) in less stressful mesic areas than in more stressful arid sites. However, contrary to common assumptions, this effect did not arise because of greater density or diversity of interacting species in less stressful areas, but rather because aridity reduced sensitivity of population growth to these interactions. Our work supports classic predictions about the relative strength of factors regulating population growth across stress gradients, but suggests that this pattern results from a previously unappreciated mechanism that may apply to many species worldwide. © 2018 National Academy of Sciences.
英文关键词	Abiotic stress; Climate change; Population growth; Range boundaries; Species interactions
语种	英语
scopus关键词	herbaceous agent; abiotic stress; Article; climate change; competition; desert; environment; herbivory; Hibiscus; Hibiscus meyeri; hypothesis; nonhuman; organismal interaction; pollination; population growth; precipitation; priority journal; shrub; temperature; Africa; animal; chemistry; desert climate; ecosystem; growth, development and aging; Hibiscus; kinetics; physiology; Africa; Animals; Climate Change; Desert Climate; Ecosystem; Herbivory; Hibiscus; Kinetics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160550
作者单位	Louthan, A.M., Department of Biology, Duke University, Durham, NC 27708, United States, Mpala Research Centre, Nanyuki, 10400, Kenya, Environmental Studies Program, University of Colorado, Boulder, CO 80309, United States; Pringle, R.M., Mpala Research Centre, Nanyuki, 10400, Kenya, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States; Goheen, J.R., Mpala Research Centre, Nanyuki, 10400, Kenya, Program in Ecology, Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, United States; Palmer, T.M., Mpala Research Centre, Nanyuki, 10400, Kenya, Department of Biology, University of Florida, Gainesville, FL 32611, United States; Morris, W.F., Department of Biology, Duke University, Durham, NC 27708, United States; Doak, D.F., Mpala Research Centre, Nanyuki, 10400, Kenya, Environmental Studies Program, University of Colorado, Boulder, CO 80309, United States
推荐引用方式 GB/T 7714	Louthan A.M.,Pringle R.M.,Goheen J.R.,et al. Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri[J],2018,115(3).
APA	Louthan A.M.,Pringle R.M.,Goheen J.R.,Palmer T.M.,Morris W.F.,&Doak D.F..(2018).Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri.Proceedings of the National Academy of Sciences of the United States of America,115(3).
MLA	Louthan A.M.,et al."Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri".Proceedings of the National Academy of Sciences of the United States of America 115.3(2018).