The Structure of Bivalvian Community in The Coast of Elak Elak Beach, West Sekotong, West Lombok, West Nusa Tenggara As An Enrichment of Invertebrate Animal Material for Senior High School Students

Elak elak beach has a sea and coast with substrate texture that is very suitable as habitat for Mollusca including bivalves. Bivalves have many roles the environment, especially in providing food various other species chain can be used to determine water quality. This study aims community structure distribution pattern of bivalves Beach see student responses booklets. The method this research line transect quadratic method. results class molluscs found Coastal Coast consisted 11 belonging 7 families. consists Anadara gubernaculum, granosa, Gafrarium dispar, Glycymeris pectunculus, Liconcha ornata, Lucinoma heroica, Mactra grandis, nitida, Donax faba Trachycardium flavum. relative abundance reaches 40% where highest grandis value 39.39%. categories diversity (H') are medium uniformity (E) high, inversely proportional dominance (C) low. based on abundance, diversity, been studied shows condition West Sekotong Beach, Lombok district, it concluded still normal condition. divided into 2 types, namely there uniform clustered which seen calculated Morisita dispersion index. Students' booklets students respond well also positive responding material enrichment about invertebrate animals senior high school students.