Abstrak
Abstract Bacteria in mangrove ecosystem provides has role in litter decomposition that is essential to provide organic nutrition for organisms in mangrove forest. The research was aimed to identify decomposition bacteria that exist in KKMB Tarakan mangrove conservation area. The identification focused on litters from several mangrove vegetation, which are Bruguiera parviflora, Rhizopora apiculata, Sonneratia alba, dan Avicennia alba. The method used was explorative descriptive while testing parameter was genus. The research identified seven bacteria genus for litter from Bruguiera parviflora which are Bacillus, Aeromonas, Nocardiae, Corynebacterium, Listeria, Bacteriodes, Psedumonas. Six genus from Rhizopora apiculata which are Bacillus, Listeria, Enterobacteria, Aeromonas, Actinobacilus, and Bacteriodes. Five genus for Sonneratia alba which are Bacillus, Aeromonas, Listeria, Enterobacteria, Stapylococcus. And eight genus from Avicennia alba which are Bacillus, Clostridium, Enterobacteria, Bacteriodes, Plesiomonas, Bordella, Streptococcus, Neisseria. The results conclude that different species of mangrove vegetation attracts different species of bacteria as well.