Keanekaragaman Makrozoobenthos di Bagian Hulu Sungai Horas Kecamatan Hatonduhan Kabupaten Simalungun Sumatera Utara

Abstract

The Diversity of Makrozoobenthos in Upstream of Horas River Subdistrict of Hatonduhan District of Simalungun North Sumaterahas been observed from April to May 2016. The sample was taken from three stations of observation, fiveteen replications were conducted in each station. The point of sampling was determined by using “Puposive Sampling” Method. The samples was taken by using surber net. The result of research indicated 14 genus of makrozoobenthos consisting of 13 families, 7 orders, and 2 class. The highest density was found in genus of Calopteryx, 34, 07 ind/m2 (station I). The highest diversity index of makrozoobenthos was found in station III, about 2,0 and the lowest one was in station I, about 1,75. The highest equitability index (E) was found in station III, about 0,96 and the lowest one was in station I, about 0,84. The lowest Famili Biotik Index (FBI) was found n station I, about 3,67.