Abstract
COMPOSITION OF MEGABENTHOS IN CORAL REEF ECOSYSTEM, PASUMPAHAN ISLAND, WEST SUMATERA
Rera Agung Syukra*, Indra Junaidi Zakaria and Nofrita
ABSTRACT
The purpose of this study is to determine density of megabenthos on coral reef in Pasumpahan Island. The observation has been carried out using a method of 5x5 m squared plot at a depth of 2-5 m. The data obtained were analyzed to get the density value. The megabenthos species were: Tridacna spp. (giant clams), Diadema setosum (sea urchin), Trochus spp. (sea snails) and Acanthaster planci (crown of thorns starfish). The highest density of megabenthos was found on Tridacna spp. (0.77 ind / m2). Despite the existence of Tridacna spp. only found in six sites (lower compared to D. setosum that was found in eight sites) of a total of nine observation sites. Tridacna spp. was found a lot, because it was dominated by rocky corals from the life form coral massive. This coral life form is useful for Tridacna spp. as a place of life by attaching and punching the coral.
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