KORELASI SEBARAN GASTROPODA DAN BAHAN ORGANIK DASAR PADA EKOSISTEM MANGROVE DI PERAIRAN PANTAI PAYUM, MERAUKE

Coastal area of Payum as an area of mangrove forest located at western of Merauke Regency. Known as area which produce a high amount of organic matters, whether comes from mangrove area itself, stream or even by sea currents. There is much living organism associated with mangrove one of them is gastropods. Sample was collected using transect quadrant methods. The quadrant size are 5 x 5 m and the gastropods were collect as well as the sediment and sea water to measure the organic matter content. At that time the environments parameters also collected they are temperature, salinity and pH. The research result are we’re successful identify 13 species of gastropods, there is Cassidula angulifera, Littoraria scabra, Terebralia sulcata, Cerithidea obtusa, Nerita violacea, Thais rufotincta, Turritella terebra, Glossaulax bicolor, Nassarius micans, Natica lineata, Nerita lineata, Mitra sp., Telescopium telescopium. Furthermore, the sediment analysis shown there are strong correlation (60%) with the existence of gastropods, reverse with sea water analysis having weak correlation which is just have 10% of correlation value. Moreover, the density and frequency relatives of gastropod species in every stasiun dominate by Littorina scabra