The Periphyton Community Structure in the Habitat of Lawar (Perinereis cf.cultrifera Grube 1840) at Wearlilir Waters in the Southeast Maluku District Indonesia

Lawar is an omnivorous benthic organisms (omnivores) and live in clean and clear waters, algae covered hard substrate, rocks, and reefs that have not been damaged. Therefore, not all coastal waters with similar characteristics, Lawar can be found at the same time of the harvest. This study aims to analyze the community structure of periphyton, the dominant kind, the kind that plays a role in the community and density types. The study was conducted for six months, from January to June 2012, using the line transect method for the acquisition of the data that were then analyzed using the Simpsons index and importance value index and density. The results obtained showed that the community structure is composed of 18 genera and 25 species. Community structure is stable because no species dominating other species where the species with more important role in the periphyton community is Geryonia proboscidalis in Lawar habitat with a density of 2.316 million cells/ ml.