Arid
DOI10.1073/pnas.1708436115
Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri
Louthan, Allison M.1,2,3; Pringle, Robert M.2,4; Goheen, Jacob R.2,5; Palmer, Todd M.2,6; Morris, William F.1; Doak, Daniel F.2,3
通讯作者Louthan, Allison M.
来源期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2018
卷号115期号:3页码:543-548
英文摘要

Predicting how species’ abundances and ranges will 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 high-elevation 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.


英文关键词abiotic stress climate change population growth range boundaries species interactions
类型Article
语种英语
国家USA ; Kenya
收录类别SCI-E
WOS记录号WOS:000423091400049
WOS关键词BIOTIC INTERACTIONS ; CLIMATE-CHANGE ; INBREEDING DEPRESSION ; RANGE LIMITS ; ENVIRONMENTAL GRADIENT ; NATURAL-POPULATIONS ; DEMOGRAPHY ; HERBIVORY ; PREDATION ; RESPONSES
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/212375
作者单位1.Duke Univ, Dept Biol, Durham, NC 27708 USA;
2.Mpala Res Ctr, Nanyuki 10400, Kenya;
3.Univ Colorado, Environm Studies Program, Boulder, CO 80309 USA;
4.Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA;
5.Univ Wyoming, Dept Zool & Physiol, Program Ecol, Laramie, WY 82071 USA;
6.Univ Florida, Dept Biol, Gainesville, FL 32611 USA
推荐引用方式
GB/T 7714
Louthan, Allison M.,Pringle, Robert M.,Goheen, Jacob R.,et al. Aridity weakens population-level effects of multiple species interactions on Hibiscus meyeri[J],2018,115(3):543-548.
APA Louthan, Allison M.,Pringle, Robert M.,Goheen, Jacob R.,Palmer, Todd M.,Morris, William F.,&Doak, Daniel 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),543-548.
MLA Louthan, Allison 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):543-548.
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