BIODIVERSITAS MAKROZOOBENTOS (KELAS BIVALVIA, ECHINIODEA DAN ASTEROIDEA) PADA PERAIRAN PADANG LAMUN DI PERAIRAN BONE BATANG KEPULAUAN SPERMONDE

Abstract

Kehidupan organisme dalam perairan ditentukan oleh kualitas perairan tempat hidupnya. Benthos sebagai biota dasar perairan relatif tidak mudah bermigrasi merupakan kelompok biota yang paling menderita akibat aktivitas masyarakat dan pencemaran perairan. Fungsi makrozoobentos dalam ekosistem perairan laut, dapat dijadikan sebagai bioindikator pendugaan kualitas perairan.ABSTRACT\ud A research about biodiversity of macrozoobenthos at sea grass bed at Bone Batang Island Spermonde Archipel was done from June to August 2005. The aim of the research was to know the biodiversity and the community structure of macrozoobenthos, however only three classes such as Bivalve, Echinoidea and Asteroidea will encountered. Two stations were selected : station I in Northern region (consist of three substations) and station II in Southern region (consist of two substations). Sampling method with quadrant transect of 2 X 2 m2 was applied in the field. The result showed that all stations Bivalve has twenty five species, Echinoidea five species and Asteroidea three species. The highest relative density of macrozoobenthos population were found in Pinna muricata (Bivalve). The value of the biodiversity index (H???) is range between 2.2 75 - 2.406, the Eveness index (E) is range between 0.688 - 0. 707,and the domination index (C) is range between 0.150 - 0.160. It is conclusion that the most dominance organism is Pinna muricata. The value of macrozoobenthos (Bivalve, Echinoidea and Asteroidea) biodiver-sity index is include in midle biodiversity. The community structure with value of biodiversity, eveness and domination index is not too stabil. The environment condition at Bone Batang island is support to bivalve, echinoidea and asteroidea in growth