Diversity of Annelids in the Kapuas and Melawi Rivers

The presence of Annelidaanimals in water is one indicator of polluted water. The purpose of this research was to determine the diversity of Annelida phylum in the Kapuas and Melawi rivers. This research usedan exploratory method to determine the diversity of annelids in the Kapuas and Melawi rivers. Sampling was carried out in 2 regions representing the left and right sides of the river, both upstream and downstream of the river. The findings of the researchshow that there are two classes of annelid phyla, namely the Oligochaeta and Hirudinae classes. Oligochaeta class is represented by Tubifex sp, Lumbricus terrestris, and Pharetima sp.species while Hirudinae class is represented by Haemodipsa sp. Species.The number of Annelids found in the Kapuas river for Tubifex sp.numbered 7 species, Lumbricus terrestris numbered 53 species and Pharetima sp.numbered 14 species. The number of Annelids found in the Melawi river for Tubifex sp.numbered 1 species, Lumbricus terrestris numbered 23 species, Pharetima sp.numbered 8 species and Haemodipsa sp amounted to 2 species. The presence of Tubifex sp. in the Kapuas and Melawi rivers shows that the quality of the river waters begins to be polluted.Article history:Received:25/01/2019Revised: 28/08/2019Accepted: 18/09/2019Copyright © 2019 Universitas Islam Negeri Raden Fatah Palembang. All Right ReservedIntroductionSintang Regency is one of the districts in the province of West Kalimantan. Sintang Regency is drained by two major rivers, the Kapuas river (1000 km) and the Melawi river (600 km) with a width of ± 250 m and a depth of 12-16 m. Melawi River is one of the largest rivers in West Kalimantan province. Melawi River is a Kapuas tributary that empties right in the middle of the city of Sintang which then ends in the Kapuas river, right in the middle of the city of Sintang (Herawati, 2015 and BAPPEDA in Sintang District, 2018).The utilizationof the Kapuas Sintang river waters is quite diverse, such as for transportation, agricultural irrigation, tap water, recreation areasand becoming a domestic waste disposal site. The Kapuas River plays an important role for people who live along the river. (Septiani, 2013).Settlements and population activities along the Kapuas and Melawi rivers can cause river pollution and can reduce river quality (Bustami, 2010; Septiani, 2013 and Mahyudin, 2015). Decreasing river quality due to pollution can change the community structure of aquatic organisms in it (Sasangko, 2015 and Warman, 2014). Changes in the quality of watersgreatly affect thelives of biota that live on the bottom of the water. This is because the river