GSTDTAP  > 资源环境科学
DOI10.1073/pnas.1911540117
An experimental test of the area-heterogeneity tradeoff
Ben-Hur, Eyal; Kadmon, Ronen
2020-03-03
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2020
卷号117期号:9页码:4815-4822
文章类型Article
语种英语
国家Israel
英文摘要

A fundamental property of ecosystems is a tradeoff between the number and size of habitats: as the number of habitats within a fixed area increases, the average area per habitat must decrease. This tradeoff is termed the "area-heterogeneity tradeoff." Theoretical models suggest that the reduction in habitat sizes under high levels of heterogeneity may cause a decline in species richness because it reduces the amount of effective area available for individual species under high levels of heterogeneity, thereby increasing the likelihood of stochastic extinctions. Here, we test this prediction using an experiment that allows us to separate the effect of the area-heterogeneity tradeoff from the total effect of habitat heterogeneity. Surprisingly, despite considerable extinctions, reduction in the amount of effective area available per species facilitated rather than reduced richness in the study communities. Our data suggest that the mechanism behind this positive effect was a decrease in the probability of deterministic competitive exclusion. We conclude that the area-heterogeneity tradeoff may have both negative and positive implications for biodiversity and that its net effect depends on the relative importance of stochastic vs. deterministic drivers of extinction in the relevant system. Our finding that the area-heterogeneity tradeoff may contribute to biodiversity adds a dimension to existing ecological theory and is highly relevant for understanding and predicting biodiversity responses to natural and anthropogenic variations in the environment.


英文关键词species richness ecological drift hypothesis habitat heterogeneity mesocosm experiment metacommunity ecology
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000518473500055
WOS关键词SPECIES-DIVERSITY ; LANDSCAPE HETEROGENEITY ; COMPETITIVE-EXCLUSION ; HABITAT HETEROGENEITY ; RICHNESS ; BIODIVERSITY ; METACOMMUNITIES ; CONSEQUENCES ; COEXISTENCE ; ASYMMETRY
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/249838
专题资源环境科学
作者单位Hebrew Univ Jerusalem, Inst Life Sci, Dept Ecol Evolut & Behav, IL-9190401 Jerusalem, Israel
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Ben-Hur, Eyal,Kadmon, Ronen. An experimental test of the area-heterogeneity tradeoff[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(9):4815-4822.
APA Ben-Hur, Eyal,&Kadmon, Ronen.(2020).An experimental test of the area-heterogeneity tradeoff.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(9),4815-4822.
MLA Ben-Hur, Eyal,et al."An experimental test of the area-heterogeneity tradeoff".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.9(2020):4815-4822.
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