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Echinobase
ECB-ART-40397
Science 1973 Nov 16;1824113:715-7. doi: 10.1126/science.182.4113.715.
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Grazing by the Echinoid Diadema antillarum Philippi: Formation of Halos around West Indian Patch Reefs.

Ogden JC , Brown RA , Salesky N .


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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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