Bioassesment Kualitas Air dengan Menggunakan Komunitas Makrozoobentos di Sungai Batang Kuranji, Kota Padang, Sumatera Barat

Dhea, Yuliani (2022) Bioassesment Kualitas Air dengan Menggunakan Komunitas Makrozoobentos di Sungai Batang Kuranji, Kota Padang, Sumatera Barat. Diploma thesis, Universitas Andalas.

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Abstract

Research on Water Quality Bioassessment using Macrozoobentos Communities in the Batang Kuranji River, Padang City, West Sumatra has been carried out from March to July 2022. This study aims to determine the composition and structure of the macrozoobentos community and water quality in the Batang Kuranji River based on the BMWP-ASPT index. This research uses survey method and station determination by purposive sampling, based on environmental baseline. Macrozoobenthos samples were taken using 30 x 30 cm2 surber net, and the physical and chemical factors of the waters were measured. The results showed that the macrozoobenthos communities found in the Batang Kuranji River were 53 genera with the composition of 8 genera Gastropods, 40 genera Insecta, 1 genera Turbellaria, 2 genera Hirudinea, and 2 genera Oligochaeta. The total density of macrozoobenthos ranged from 342 - 1084 ind./m2 with the highest density at station I and the lowest at station II. The predominant genera (KR 10%) found at each station varied. At station I, namely Ecdyonurus and Glossosoma, station II are Hydropsyche and Orthocladius and Caenis, stations III and IV are Baetis, Caenis and Orthocladius, station V are Melanoides, Clithon, Branchiura and Tubifex. The macrozoobenthos diversity index in the Batang Kuranji River was 1.97 with a range of H' = 1.98 - 2.93 classified as moderate, and the Macrozoobenthos Evenness Index was 0.491 with a range of E = 0.806 - 0.908 classified as evenly distributed. The water quality in the Batang Kuranji River based on the BMWP-ASPT index is classified as unpolluted to heavily polluted.

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