Fish communities on the world's warmest reefs: What can they tell us about the effects of climate change in the future?

D. A. Feary, J. A. Burt, A. G. Bauman, P. Usseglio, P. F. Sale, G. H. Cavalcante

Research output: Contribution to journalArticlepeer-review

Abstract

To examine the role of climatic extremes in structuring reef fish communities in the Arabian region, reef fish communities were visually surveyed at four sites within the southern Persian Gulf (also known as the Arabian Gulf and The Gulf), where sea-surface temperatures are extreme (range: 12-35° C annually), and these were compared with communities at four latitudinally similar sites in the biogeographically connected Gulf of Oman, where conditions are more moderate (range: 22-31° C annually). Although sites were relatively similar in the cover and composition of coral communities, substantial differences in the structure and composition of associated fish assemblages were apparent. Fish assemblages in the southern Persian Gulf held significantly lower estimates of abundance, richness and biomass, with significantly higher abundances of smaller sized individuals than Gulf of Oman assemblages. Functionally, southern Persian Gulf sites held significantly lower abundances of nearly all the common fish trophic guilds found on Gulf of Oman sites, although higher abundances of herbivorous grazers were apparent. These results suggest the potential for substantial changes in the structure of reef-associated fish communities, independent of changes in habitat within an environment of increasing fluctuations in oceanic climate.

Original languageEnglish (US)
Pages (from-to)1931-1947
Number of pages17
JournalJournal of Fish Biology
Volume77
Issue number8
DOIs
StatePublished - Nov 2010

Keywords

  • Arabian Gulf
  • Climate change
  • Coral-reef fishes
  • Gulf of Oman
  • Persian Gulf
  • Temperature

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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