Extensions of Island Biogeography Theory predict the scaling of functional trait composition with habitat area and isolation

Jacquet, Claire, Mouillot, David, Kulbicki, Michel, and Gravel, Dominique (2017) Extensions of Island Biogeography Theory predict the scaling of functional trait composition with habitat area and isolation. Ecology Letters, 20 (2). pp. 135-146.

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Abstract

The Theory of Island Biogeography (TIB) predicts how area and isolation influence species richness equilibrium on insular habitats. However, the TIB remains silent about functional trait composition and provides no information on the scaling of functional diversity with area, an observation that is now documented in many systems. To fill this gap, we develop a probabilistic approach to predict the distribution of a trait as a function of habitat area and isolation, extending the TIB beyond the traditional species-area relationship. We compare model predictions to the body-size distribution of piscivorous and herbivorous fishes found on tropical reefs worldwide. We find that small and isolated reefs have a higher proportion of large-sized species than large and connected reefs. We also find that knowledge of species body-size and trophic position improves the predictions of fish occupancy on tropical reefs, supporting both the allometric and trophic theory of island biogeography. The integration of functional ecology to island biogeography is broadly applicable to any functional traits and provides a general probabilistic approach to study the scaling of trait distribution with habitat area and isolation.

Item ID: 50464
Item Type: Article (Research - C1)
ISSN: 1461-0248
Keywords: Allometric theory, body-size, food web, island biogeography, tropical reefs
Funders: Ministry of Higher Education and Research, France, Canada Research Chair Program, Natural Sciences and Engineering Research Council of Canada (NSERC), ANR-FNS, SeaConnect
Projects and Grants: NSERC Discovery Grant, ANR-FNS REEFISH no. 310030E-164294
Date Deposited: 20 Sep 2017 09:21
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050206 Environmental Monitoring @ 100%
SEO Codes: 96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960603 Environmental Lifecycle Assessment @ 100%
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