Changes in biodiversity and functioning of reef fish assemblages following coral bleaching and coral loss

M.S. Pratchett, Andrew Hoey, S.K. Wilson, V. Messmer, N.A.J. Graham

Research output: Contribution to journalArticlepeer-review

123 Scopus citations

Abstract

Coral reef ecosystems are increasingly subject to severe, large-scale disturbances caused by climate change (e.g., coral bleaching) and other more direct anthropogenic impacts. Many of these disturbances cause coral loss and corresponding changes in habitat structure, which has further important effects on abundance and diversity of coral reef fishes. Declines in the abundance and diversity of coral reef fishes are of considerable concern, given the potential loss of ecosystem function. This study explored the effects of coral loss, recorded in studies conducted throughout the world, on the diversity of fishes and also on individual responses of fishes within different functional groups. Extensive (>60%) coral loss almost invariably led to declines in fish diversity. Moreover, most fishes declined in abundance following acute disturbances that caused >10% declines in local coral cover. Response diversity, which is considered critical in maintaining ecosystem function and promoting resilience, was very low for corallivores, but was much higher for herbivores, omnivores and carnivores. Sustained and ongoing climate change thus poses a significant threat to coral reef ecosystems and diversity hotspots are no less susceptible to projected changes in diversity and function.
Original languageEnglish (US)
Pages (from-to)424-452
Number of pages29
JournalDiversity
Volume3
Issue number3
DOIs
StatePublished - Aug 12 2011

ASJC Scopus subject areas

  • Ecological Modeling
  • Agricultural and Biological Sciences (miscellaneous)
  • Ecology
  • Nature and Landscape Conservation

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