Grazing by the Echinoid Diadema antillarum Philippi: Formation of Halos around West Indian Patch Reefs

J C OgdenN Salesky


Between patch reefs and marine grass communities there is normally a zone or "halo" of heavily grazed grass 2 to 10 meters wide. Grazing by the echinoid Diadema antillarum Philippi during nocturnal migrations off the reefs is found to be the major factor in the formation of halos.


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