Keanekaragaman Makrozoobentos di Perairan Sungai Asahan Sumatera Utara

Abstract

Research about “The Diversity of Macrozoobenthos in Asahan River North Sumatera” was implemented on May 2013. Using Purposive Random Sampling method to determine 5 research stasions with different activities. The aimed of the research was to know the diversity of Macrozoobenthos in Asahan River, North Sumatra and its corelation with the fisic and chemical factor of water. The result showed that there were 40 genera of macrozoobenthos within 3 phylum, 5 class, 15 ordo and 39 family. Genus Hydrospysche had the highest density with 223,4 ind/m2 found at station 1, and the lowest density were genus Limnophila, Pelocoris and Calopteryx with 1,23 ind/m2. The highest diversity index (H’) was 2,53 in station 2 and the lowest was 1,37 in station 1. The highest uniformity index (E) was 0,93 in station 2 and the lowest was 0,48 in station 1. Result of correlation analysis showed that temperature correlated very strongly with macrozoobenthos diversity index (H’).