Abstract
The interstices of coral rubble, the most common deposits of many reefs, provide extensive surfaces for a variety of sessile and vagile coelobites (cavity-dwellers). In the northern Florida Reef Tract there are at least 80 different sessile coelobites in coral rubble collected from 21 stations from in-shore lagoon to fore-reef, depth 40 meters. Three microzones of coelobites on the undersides of rubble were distinguished on the bases of their dominant community assemblages; algal microzone in the peripheral area, sponge-bryozoan microzone in the transitional area, and foraminiferal microzone in the central area. In the transect that extends some 6–7 km across the reef tract, the biomass is largest in the rubble of the shallow (1–3 m) shelf margin and it decreases shoreward and in deeper water; however, the maximum variety of species comes in the fore-reef at depths of about 20–30 m. Four coelobite zones are recognized in the reef transect based on distribution pattern and relative abundance of diagnostic species; 1) in-shore lagoon zone, 2) lagoon-reef zone, 3) marginal reef zone, and 4) fore-reef zone. Although this paper does not propose a comprehensive explanation for the distribution of coelobites, it does emphasize the importance of two factors that affect coelobite development and distribution: interstitial sediment as a negative (limiting) factor and flushing as a positive factor.
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Choi, D.R., Ginsburg, R.N. Distribution of coelobites (cavity-dwellers) in coral rubble across the Florida Reef Tract. Coral Reefs 2, 165–172 (1983). https://doi.org/10.1007/BF00336723
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DOI: https://doi.org/10.1007/BF00336723