Komposisi dan Kelimpahan Moluska (Gastropoda dan Bivalvia) di Ekosistem Mangrove Muara Sungai Musi Kabupaten Banyuasin Provinsi Sumatera Selatan

Komposisi dan Kelimpahan Moluska (Gastropoda dan Bivalvia) di Ekosistem Mangrove Muara Sungai Musi Kabupaten Banyuasin Provinsi Sumatera Selatan

Hartoni dan Andi Agussalim

Program Studi Ilmu Kelautan FMIPA Universitas Sriwijaya, Inderalaya, Indonesia

Received  24 Oktober 2012; received in revised form 10 November 2012;

accepted 28 November 2012

ABSTRAK

Penelitian mengenai komposisi dan kelimpahan moluska (gastropoda dan bivalvia) di ekosistem mangrove muara Sungai Musi Kabupaten Banyuasin provinsi Sumatera Selatan telah dilaksanakan dari bulan Juli - Agustus 2007. Tujuan penelitian ini adalah untuk mengetahui komposisi dan kelimpahan moluska terutama gastropoda dan bivalvia di ekosistem mangrove muara Sungai Musi Kabupaten Banyuasin provinsi Sumatera Selatan. Stasiun penelitian dilakukan pada 5 stasiun. Metode penempatan stasiun yang digunakan adalah purposive sampling. Pengambilan sampel moluska (gastropoda dan bivalvia) dilakukan menggunakan transek kuadrat yang berukuran 1 x 1 m². Hasil penelitian menunjukkan bahwa komposisi moluska adalah 21 spesies yang terdiri gastropoda 17 spesies dan bivalvia 4 spesies. Kelimpahan moluska tertinggi pada stasiun 2 yaitu 845.556 ind/ha sedangkan terendah pada stasiun 4 yaitu 330.000 ind/ha. Kelimpahan gastropoda tertinggi pada stasiun 2 yaitu  844.444 ind/ha sedangkan terendah pada stasiun 4 yaitu sebesar 330.000 ind/ha. Kelimpahan bivalvia tertinggi pada stasiun 5 yaitu 4.444 ind/ha. Gastropoda spesies Littoria scabra ditemukan sangat dominan disetiap stasiun. Mangrove yang ditemukan Avicennia alba, Sonneratia caseolaris, Rhizophora stylosa dan Bruguiera gymnorrhiza.

Kata kunci : Gastropoda, Bivalvia, Sungai Musi 

ABSTRACT

Research on the composition and abundance of mollusca (gastropods and bivalves) in the Musi River estuary mangrove ecosystem Banyuasin regency of South Sumatra province has been conducted from July to August 2007. The purpose of this study was to determine the composition and abundance of mollusca, especially gastropods and bivalves in the ecosystem of the mangrove estuary of the Musi River Banyuasin district in South Sumatra province. Station research conducted at 5 stations. Station placement method used was purposive sampling. Sampling mollusca (gastropods and bivalves) are conducted using transect squares measuring 1 x 1 m2. The results showed that the composition of 21 species of mollusca are gastropods contain of 17 species and 4 species of bivalves. Mollusca abundance highest in station 2 was 845.556 ind / ha while the lowest at station 4 was 330.000 ind / ha. Gastropod abundance is highest at station 2 was 844.444 ind / ha while the lowest at station 4 was 330.000 ind / ha. Bivalves highest abundance at station 5 was 4444 ind / ha. Gastropod species found Littorina scabra very dominant in every station. Mangroves are found Avicennia alba, Sonneratia caseolaris, Rhizophora stylosa and Bruguiera gymnorrhiza

Keywords: Gastropoda, Bivalvia, Musi River
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