Ritchie, K.B.; Smith, G.W. 1994. Carbon source utilization patterns of coral associated marine heterotrophs. 3rd International Marine Biotechnology Conference: Program, Abstracts and List of Participants. International Advisory Comm. of the Int. Marine Biotechnology Conference 1994, Tromsoe Norway TROMSOE NORWAY TROMSOE UNIVERSITY 1994 p. 118 Very little information exists on the structure of bacterial communities associated with scleractinian corals. Interest, however, in both community structure and changes in structure, has increased due to the realization that bacteria may play a major role in certain types of bleaching events. We have determined carbon utilization patterns for heterotrophic bacterial communities associated with the hard corals Monastrea annularis and Acropora cervicornis. Surface samples were taken from both healthy and bleached areas of the corals growing off the coast of San Salvador Island, Bahamas. Similar population shifts were observed in both species during bleaching, and results indicate a pathogenic bacterium may be responsible for white band disease.