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DOI | 10.1073/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
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ISSN | 0027-8424 |
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 |
推荐引用方式 GB/T 7714 | 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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