| Microorganisms found in marine sediments have an important role in biogeochemical cycles such as carbon, nitrogen, phosphorus, sulfur, and some heavy metals cycle. The purpose of this study was to obtain information on the diversity of microbial communities in marine sediments from Coral Triangle Initiative (CTI) region which represented by Do’o island and Batu Termanu, Rote island which are located in East Nusa Tenggara (EST) and non-CTI region represented by Jagung island from Kepulauan Seribu associated with physical condition of the environment. Samples were taken from Jagung island, Do'o island, and Batu Termanu. Analysis were done using Terminal Restriction Fragment Length Polymorphism (T-RFLP) with three restriction enzymes: BstUI, HpaII, and RsaI. Jagung Island performed the highest diversity with Shannon and Simpson index of 1.54 and 0.63. The results indicated that bacteria found in sediments were from the Actinobacteria, Bacilli, Bacteroidetes, Cyanobacteria, d-Proteobacteria, Flavobacteria, ?-Proteobacteria, and Mollicutes class. This results can be used as an initial reference for diversity information, environmental condition, and also exploration of their beneficial microbes from these regions. |