Biodiversitas Makroinvertebrata di Sungai Sikam Kabupaten Simalungun Provinsi Sumatera Utara

Abstract

Macroinvertebrates are essential indicators of water quality, making the understanding of their species diversity crucial for effective water resource management. This study aims to assess the biodiversity of macroinvertebrates and its correlation with water quality in the Sikam River, Simalungun Regency, North Sumatra. Analyses were performed on abundance, frequency, relative frequency, diversity, evenness, and dominance, employing both the SingScore and BMWP methods. The results identified 47 species of macroinvertebrates, with a diversity index (H’) ranging from 0.22 to 2.92, an evenness index (E) from 0.07 to 0.75, and a dominance index (C) from 0.06 to 0.89. The SingScore method indicated water quality conditions varying from very good to poor, while the BMWP method also revealed conditions from very good to poor. Furthermore, the analysis of physical and chemical parameters, including temperature, clarity, turbidity, depth, river width, channel width, current velocity, pH, and dissolved oxygen (DO), demonstrated significant relationships with the presence of macroinvertebrates.