Wave-induced abiotic stress shapes phenotypic diversity in a coral reef fish across a geographical cline

Fulton, C.J., Binning, S.A., Wainwright, P.C., and Bellwood, D.R. (2013) Wave-induced abiotic stress shapes phenotypic diversity in a coral reef fish across a geographical cline. Coral Reefs, 32 (3). pp. 685-689.

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While morphological variation across geographical clines has been well documented, it is often unclear whether such changes enhance individual performance to local environments. We examined whether the damselfish Acanthochromis polyacanthus display functional changes in swimming phenotype across a 40-km cline in wave-driven water motion on the Great Barrier Reef, Australia. A. polyacanthus populations displayed strong intraspecific variation in swimming morphology and performance that matched local levels of water motion: individuals on reefs subject to high water motion displayed higher aspect-ratio fins and faster swimming speeds than conspecifics on sheltered reefs. Remarkably, intraspecific variation within A. polyacanthus spanned over half the diversity seen among closely related damselfish species from the same region. We find that local selection driven by wave-induced abiotic stress is an overarching ecological mechanism shaping the inter- and intraspecific locomotor diversity of coral reef fishes.

Item ID: 29621
Item Type: Article (Research - C1)
ISSN: 1432-0975
Keywords: ecophysiology, adaptive radiation, labriform, Pomacentridae
Funders: Australian Research Council (ARC), Lizard Island Reef Research Foundation, Australian National University (ANU)
Date Deposited: 02 Oct 2013 05:25
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060202 Community Ecology (excl Invasive Species Ecology) @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970105 Expanding Knowledge in the Environmental Sciences @ 100%
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