Coral Reefs

, Volume 29, Issue 2, pp 527–532 | Cite as

Predators reduce abundance and species richness of coral reef fish recruits via non-selective predation

Note

Abstract

Predators have important effects on coral reef fish populations, but their effects on community structure have only recently been investigated and are not yet well understood. Here, the effect of predation on the diversity and abundance of young coral reef fishes was experimentally examined in Moorea, French Polynesia. Effects of predators were quantified by monitoring recruitment of fishes onto standardized patch reefs in predator-exclosure cages or uncaged reefs. At the end of the 54-day experiment, recruits were 74% less abundant on reefs exposed to predators than on caged ones, and species richness was 42% lower on reefs exposed to predators. Effects of predators varied somewhat among families, however, rarefaction analysis indicated that predators foraged non-selectively among species. These results indicate that predation can alter diversity of reef fish communities by indiscriminately reducing the abundance of fishes soon after settlement, thereby reducing the number of species present on reefs.

Keywords

Coral reef fish Moorea Predation Recruitment Species diversity 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Marine Science CenterNortheastern UniversityNahantUSA
  2. 2.Department of BiologyUniversity of FloridaGainesvilleUSA
  3. 3.Department of BiologyCalifornia State UniversityNorthridgeUSA

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