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- doi: 10.1111/cobi.14092
- issn: 0888-8892
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info:eu-repo/semantics/altIdentifier/doi/10.1111/cobi.14092
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info:eu-repo/semantics/altIdentifier/pmid/37021385
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info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_580E34CF170C4
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Biological diversity Biotic diversity Diversity, Biological Diversification, Biological Biological diversificationCiter ce document
F. Riva et al., « Obstruction of biodiversity conservation by minimum patch size criteria. », Serveur académique Lausannois, ID : 10.1111/cobi.14092
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Minimum patch size criteria for habitat protection reflect the conservation principle that a single large (SL) patch of habitat has higher biodiversity than several small (SS) patches of the same total area (SL > SS). Nonetheless, this principle is often incorrect, and biodiversity conservation requires placing more emphasis on protection of large numbers of small patches (SS > SL). We used a global database reporting the abundances of species across hundreds of patches to assess the SL > SS principle in systems where small patches are much smaller than the typical minimum patch size criteria applied for biodiversity conservation (i.e., ∼85% of patches SS principle and consistent with previous syntheses, species richness accumulated more rapidly when adding several small patches (45.2% SS > SL vs. 19.9% SL > SS) to reach the same cumulative area, even for the very small patches in our data set. Responses of taxa to habitat fragmentation differed, which suggests that when a given total area of habitat is to be protected, overall biodiversity conservation will be most effective if that habitat is composed of as many small patches as possible, plus a few large ones. Because minimum patch size criteria often require larger patches than the small patches we examined, our results suggest that such criteria hinder efforts to protect biodiversity.