Community structure of crustacean in mangrove ecosystem rehabilitation in Banda Aceh and Aceh Besar district, Indonesia

Abstract

The abundance and biological indices of crustacean macrofauna were studied in the mangrove ecosystem along the coastal area in Aceh Besar and Banda Aceh. One of the macrofaunas that have high ecologic and economic value is the crustacean. The present study was conducted in the mangrove rehabilitation on November to December 2016. The objective of the study was to obtain the community structure of crustacean in mangrove rehabilitation including abundance, diversity, evenness and dominance indices. Sampling was carried out in five observation stations with purposive sampling method, and the obtainment of macrofauna was done by using square transect (2×2 m2). We recorded five families of crustacean and the highest composition was Ocypodidae (60%), whereas Portunidae, Sesarmidae, Penaeidae, Palaemonidae were 10%, respectively. The highest abundance of crustacean was Sesarma sp. (6 individuals/4m2), and this species almost found in all sampling plot. The diversity index ranged from 1.19 to 2.93 indicating a moderate category, while evenness index was in the moderate and high category ranged from 0.58 to 0.98. In addition, the dominance index (D) ranged from 0.14 to 0.51. Evenness and Dominance indices implied that the total number of individuals in the species were almost the same and there was no domination of certain species at field study.