Assesing the Community Structure of Macrozoobenthos in Cibeureum Lake, Tasikmalaya, West Java, Indonesia

The purpose of this research is to determine the water quality of Cibeureum Lake, Tasikmalaya City by analyzing the macrozoobenthos community structure. The study was conducted from September to November 2021 using a survey method with purposive sampling. Descriptive analysis was employed to analyze the observation data. The studi revealed the presence three classes and eight species, the species being Filopaludina javanaica, Pila ampullacea, Pomacea canaliculata, Melanoides turbeculata, Lymnaea rubiginosa, Indoplanorbis exustus, Chironomus sp., and Tubifex tubifex, with 3 species with the most composition being Pomacea canaliculata (28% ), Filopaludina javanaica (25%), and Melanoides turbeculata (13%).The results demonstrated that the water quality in Cieureum Lake, as determined by macrozoobenthos bioindicator, fell into the moderately polluted category. This is diversity indicated values ranged from 1.3 to 1.8, classifying the macrozoobenthos community as moderately diverse. The uniformity index value ranged from 0.57 to 0.66, indicating an unstable population conditions, suggesting moderate uniformity of macrozoobenthos in the lake. According to FBI (Functional Biological Index) score, Cibeureum Lake exhibit a range of water quality criteria from very good to fair. Station 2 and station 4 obtained excellent waters quality rating with an FBI rating 3.97 and 4.16 respectively. Station 1 obtained a good water quality rating with an FBI score 4.72, while station 3 received a sufficient water quality rating with an FBI rating 5.50. Consequently, from the results of this study the pollution status of Cibeureum Lake was ranged from slightly polluted to quite polluted.