Abstract

Mangrove association mollusks was one of the indicator to describe the status of mangrove ecosystem’s health. This research purposed to comparing the composition of mangrove association of mollusks in natural and rehabilitation mangrove ecosystem. It held on March to June 2019 at 2 types of mangrove ecosystem such as natural ecosystem at Pemongkong, East Lombok and rehabilitation ecosystem at Gerupuk bay. Data collection method used purposive random sampling by placed a plot sized 1x1 m randomly in a larger plot (10x10 m) which have been determine before. The result showed that there are 37 species of association of mollusks which belong to 14 families. 14 species found in both locations, 3 species only found at rehabilitation  ecosystem, and 20 species left only found at natural mangrove ecosystem at Pemongkong. Natural mangrove ecosystem Pemongkong had higher abundance of association mollusks with number of abundance 77.692 ind/m2 against rehabilitation ecosystem which only reached 48.746 ind/m2. Potamididae has the highest diversity and abundance value in both location. The resemblance of these 2 ecosystem based on the proportion of each species in the mollusks community showed by Similarity Presentation categorized as low level which only reach 36,36% of similarity.

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