期刊
ECOLOGY LETTERS
卷 19, 期 5, 页码 510-518出版社
WILEY
DOI: 10.1111/ele.12582
关键词
Biodiversity loss; biotic homogenisation; diversity-stability relationship; effective number of species; environmental homogenisation; metacommunity; scale; variability
类别
资金
- TULIP Laboratory of Excellence [ANR-10-LABX-41]
- BIOSTASES Advanced Grant - European Research Council under the European Union [666971]
- European Research Council (ERC) [666971] Funding Source: European Research Council (ERC)
Although diversity-stability relationships have been extensively studied in local ecosystems, the global biodiversity crisis calls for an improved understanding of these relationships in a spatial context. Here, we use a dynamical model of competitive metacommunities to study the relationships between species diversity and ecosystem variability across scales. We derive analytic relationships under a limiting case; these results are extended to more general cases with numerical simulations. Our model shows that, while alpha diversity decreases local ecosystem variability, beta diversity generally contributes to increasing spatial asynchrony among local ecosystems. Consequently, both alpha and beta diversity provide stabilising effects for regional ecosystems, through local and spatial insurance effects respectively. We further show that at the regional scale, the stabilising effect of biodiversity increases as spatial environmental correlation increases. Our findings have important implications for understanding the interactive effects of global environmental changes (e. g. environmental homogenisation) and biodiversity loss on ecosystem sustainability at large scales.
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