2024-12-03 ワシントン大学セントルイス校
An Arctic tern soars in Alaska. (Photo: Justin Baldwin)
<関連情報>
- https://source.washu.edu/2024/12/island-biodiversity-rides-on-the-wings-of-birds/
- https://onlinelibrary.wiley.com/doi/10.1111/ele.70020
鳥類の分散能力が世界中の島々における種と面積の関係を形成する Avian Dispersal Ability Shapes Species–Area Relationships on Islands Worldwide
J. W. Baldwin, Jonathan A. Myers
Ecology Letters Published: 02 December 2024
DOI:https://doi.org/10.1111/ele.70020
ABSTRACT
Island biogeography theory provides key insights into biodiversity patterns across islands species–area relationships and conservation. However, classical island biogeography theory assumes that species are ecologically equivalent in terms of their dispersal ability. We evaluated the role of a key trait (hand-wing index, a proxy for dispersal ability in birds) in shaping species-area relationships of avifauna spanning 6706 species on 3894 islands. High community-weighted mean (CWM) dispersal ability in regional species pools had widespread but context-dependent effects on island species-area relationships. Among island archipelagos at smaller spatial extents, high CWM dispersal ability was associated with steeper species-area relationships. Among zoogeographical realms at larger spatial extents high CWM dispersal ability was associated with shallower species-area relationships and higher local species richness on small islands. Our study reveals that geographic variation in species’ dispersal traits has strong effects on island species-area relationships and likely plays an important role in non-neutral community assembly.