Crustose coralline algae can suppress macroalgal growth and recruitment on Hawaiian coral reefs
Competition between corals and neighbouring algae has been extensively investigated. Vermeij and co-authors looked at competition between two major algal groups on Hawaiian reefs and found that a group of calcifying red algae (crustose coralline algae or CCA) suppressed the growth and reproduction of co-occurring macroalgae. Because CCA also promote settlement and metamorphosis in coral larvae, CCA are a keystone functional group simultaneously affecting the abundance of corals and macroalgae in a positive and negative manner, respectively.
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