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Herbivory facilitates growth of a key reef‐building Caribbean coral
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Herbivory facilitates growth of a key reef‐building Caribbean coral
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Journal Article
Herbivory facilitates growth of a key reef‐building Caribbean coral
2017
Overview
The decline of reef‐building corals in conjunction with shifts to short‐lived opportunistic species has prompted concerns that Caribbean reef framework‐building capacity has substantially diminished. Restoring herbivore populations may be a potential driver of coral recovery; however, the impact of herbivores on coral calcification has been little studied. We performed an exclusion experiment to evaluate the impact of herbivory on Orbicella faveolata coral growth over 14 months. The experiment consisted of three treatments: full exclusion cages; half cage procedural controls; and uncaged control plates, each with small O. faveolata colonies. We found that herbivorous fish exclusion had a substantial impact on both macroalgal cover and coral growth. Fleshy macroalgae reached 50% cover within some exclusion cages, but were almost absent from uncaged control plates. Critically, O. faveolata calcification rates were suppressed by almost half within exclusion cages, with monthly coral growth negatively related to overgrowth by fleshy macroalgae. These findings highlight the importance of herbivorous fishes for coral growth and the detrimental impact of macroalgal proliferation in the Caribbean. Policy makers and local managers should consider measures to protect herbivorous fishes and reduce macroalgal proliferation to enable coral communities to continue to grow and function. We performed a herbivore exclusion experiment to evaluate the impact of herbivory on Caribbean coral growth. We found that herbivorous fish exclusion had a substantial impact on both macroalgal cover and coral growth, with calcification rates suppressed by almost half within exclusion cages. These findings highlight the importance of herbivorous fishes for coral growth and the detrimental impact of macroalgal proliferation in the Caribbean.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc
Subject
