Hubungan Kerapatan Mangrove terhadap Kepadatan Moluska di Dusun II Desa Pulau Sembilan Kecamatan Pangkalan Susu Kabupaten Langkat Provinsi Sumatera Utara

Abstract

Mangroves serve as a habitat for organisms that are present in it, one of which is Molluscs. The abundance and diversity of molluscs are very dependent on the power of tolerance to environmental changes. This research was aimed to analyze density of Molluscs and how a relation with density of mangrove in the Village of Pulau Sembilan. This research is done in Maret to April 2016. The study used purposive random sampling method by taking and observation of mangrove vegetation and density of molluscs and measurement of water quality parameters. Data analysis included analysis of mangrove vegetation, analysis of Molluscs, analysis of water quality and analysis of the substrate. Found 9 species of Molluscs at the research site are Nerita balteata has the highest composition of 32%. Chicoreus capucinus 25%, Cerithidea cingulata 24%, Littorina melanostoma 7%, Littorina scabra 4%, Cerithidea obtusa and Telescopium telescopium have the same compsition that is equal to 3%. Nassarius dorsatus 2% and Pugilina cochilidium 0%. The relationship between the density of mangrove species to the density of Molluscs in Pulau Sembilan indicated by the equation y = 0,022x - 59.77 with R 2 of 0.851 and r = 0.922. From the analysis ANOVA test counted the F value of 548.318 and F table is of significant value of 0.00001 7.708 (p <0.05).