期刊
ECOGRAPHY
卷 42, 期 5, 页码 1012-1023出版社
WILEY
DOI: 10.1111/ecog.04117
关键词
species composition; dissimilarity; diversity partitioning; scale dependence; spatial grain
资金
- Wellcome Trust ISSF grant [105621/Z/14/Z]
- Fundacao para a Ciencia e Tecnologia, Portugal [POPH/FSE SFRH/BD/90469/2012]
- ERC BioTIME [250189]
- BioCHANGE [727440]
- USDA Hatch grant [1011538]
- NSF ABI [1660000]
- ERC AdG BioTIME [250189]
- ERC PoC BioCHANGE [727440]
- European Research Council (ERC) [727440, 250189] Funding Source: European Research Council (ERC)
- Wellcome Trust [105621/Z/14/Z] Funding Source: Wellcome Trust
beta-diversity (variation in community composition) is a fundamental component of biodiversity, with implications for macroecology, community ecology and conservation. However, its scaling properties are poorly understood. Here, we systematically assessed the spatial scaling of beta-diversity using 12 empirical large-scale datasets including different taxonomic groups, by examining two conceptual types of beta-diversity and explicitly considering the turnover and nestedness components. We found highly consistent patterns across datasets. Multiple-site beta-diversity (i.e. variation across multiple sites) scaling curves were remarkably consistent, with beta-diversity decreasing with sampled area according to a power law. For pairwise dissimilarities, the rates of increase of dissimilarity with geographic distance remained largely constant across scales, while grain size (or scale level) had a stronger effect on overall dissimilarity. In both analyses, turnover was the main contributor to beta-diversity, following total beta-diversity patterns closely, while the nestedness component was largely insensitive to scale changes. Our results highlight the importance of integrating both inter- and intraspecific aggregation patterns across spatial scales, which underpin substantial differences in community structure from local to regional scales.
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