Studi Keanekaragaman Bivalvia di Perairan Tanjungbalai Provinsi Sumatera Utara

Abstract

Research on "Study of Bivalve Diversity in Tanjungbalai Waters of North Sumatra Province" was conducted from October to November 2016. The samples was taken from 3 stations with repeating 3 times. The results of the research was found as many as 2393 individuals consisting of 6 families and 14 species. The highest Importance Value Index (IVI) is 48.371% was found in Meretrix meretrix and the lowest is 1,730% was found in Calista erycina. Bivalve abundance of the research results ranged from 72 to 110 individuals/m2. The diversity index (H') of the research ranged from 0.980 to 1.926 was rated low to medium, the dominant index (C) ranged from 0.169 to 0.467 and evenness index (E) ranged from 0.609 to 0.803. The results of the measurement of the physical and chemical parameters of waters are still at a reasonable threshold for bivalves living. Negative correlation value was found on parameters of temperature, brightness, pH, DO, salinity and nitrite which means the relationship between two variables is not in the opposite direction, whereas positive value correlation whereas on environmental parameters depth, phosphate and orgainic material which means the relationship between two variables is unidirectional.