FAUNA BENTOS BERUKURAN LEBIH DARI 1MM DI MUARA SUNGAI SARIO, KOTA MANADO

Abstract

Benthic fauna is a group of benthic organisms that live on the bottom of the water or bottom of sedimentary grounds or among sediments. This study aims to understand the distribution and types of benthic faunal organisms measuring > 1mm in the Sario river at a depth of 1-3 m. Benthos sampling was carried out using a grab sampler with three repetitions. The benthic sediment sample was sieved using a 1000 m (1.0 mm) sieve. The sediment retained in the sieve was identified based on its morphological characters using a stereomicroscope. Furthermore, the number of organisms found was counted and analyzed according to the calculation of the ecological index.  The results of the identification of benthic faunal organisms >1mm got a total of 60 individuals from 9 families earning an average density of 222.1 ind/m2, Diversity Index 1.04 (medium category), Uniformity Index 0.47 (medium category), and Dominance Index 0.44 (no one dominates).