Types and Macrobenthos Abundance in River of Tohor Subdistrict East Tebingtinggen, District of Kepulauan Meranti,Riau Province, Indonesia

This study aims to determine the type and abundance of macro benthos in Tohor river Tebing Tinggi Region, District of Kepulauan Meranti, Riau, Indonesia. The test sample was taken from 35 stations on the Tohor River, using the Surber network. Samples were analyzed in Aquatic Biology laboratories, and Ecological Laboratory and water management to identify species name, character, abundance, species diversity values, species dominance in the Tohor River. The result of identification of macrozoobenthos known that there are 5 species, namely: Melanoidestuberculata, Melanoidesrustica, Sulnospiratestudinaria, Thiarascabra, Pomaceacanaliculata. The species diversity at each station varies from 0.11 to 1.09. The variety of species is still low category. While the highest diversity is found only in station 32.

Keywords: Abundance, Diversity, species dominance, Macrobenthos, Tohor River, KepulauanMeranti District.