Cijulang River, Pangandaran is a river that is used for agriculture, fisheries, industry, household activities and even as a tourist attraction. Macrozoobenthos is a bioindicator that can show changes in the quality of river waters due to these activities. The purpose of this study was to determine the macrozoobenthos community structure found on the Cijulang River, Pangandaran. The research method used is Purposive Sampling. The study was conducted at 4 stations along the Cijulang River from upstream to downstream in September – November 2018. The results of the research on the Cijulang River found 27 species of 5 classes included in 3 fillum namely Mollusca (23 species), Arthropoda (3 species) and Annelida (1 species). The value of macrozoobenthos density in the Cijulang River ranges from 29.7 – 416.3 ind/m2. Diversity index ranges from 1.48 – 2.24. The uniformity index ranges from 0.49 – 0.80. The range of water quality and substrate showed variations and dynamics that were still within the tolerance limits of macrozoobenthos life and water salinity is the main causes of variations in the macrozoobenthos community structure on the Cijulang River.
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