Keanekaragaman Makrozoobentos di Perairan Danau Toba Desa Silalahi Kabupaten Dairi

Abstract

Research entitled Diversity of Macrozoobentos in Silalahi Village, District of Dairi, Toba Lake Waterway has been done to analyze the diversity of macrozoobentos and the relationship between the water physico-chemical factors with diversity of macrozoobentos in Silalahi Village, District of Dairi, Toba Lake Waterway. This study used Purposive Sampling method in five different locations based on human activities at each study site. The research showed that there were 17 genera of macrozoobentos included into two phyla, 4 classes, 6 orders and 12 families. The highest density was showed from genus Thiara with value of 30.86 ind /m2 which were found at station 1 and the lowest density was showed from genus Notonecta with value of 2.47 ind / m2 . The highest Diversity index (H ') was from station 3 with value of 2.58 while the lowest was from station 5 with value of 1.92. Uniformity index value (E) ranged from 0.92 to 0.95. Results of correlation analysis shows the temperature had very strong influence on diversity index (H ') of macrozoobentos.