Water Quality of Pond Irrigation ChannelsBased on the Community Structure of Macrozoobenthosin Legonkulon,Subang, West Java

Abstract

This research aimed to analyze the quality of water in pond irrigation channels by examining the community structure of macrozoobenthos in Legonkulon, Subang Regency, West Java. The research was conducted in the Pond Irrigation Channels, Subang Regency, West Java starting from July until September 2020. This research method used a survey method using primary data in the form of physical chemistry of aquatic data, macrozoobenthos density, diversity index, uniformity index. The method used in data collecting techniques was purposive sampling in determining 4 stations and 3 repetitions. Data analysis in this research used descriptive analysis. Research results found 28 species consisting of 3 phyla, namely Mollusca, Arthropoda, and Annelida. The species that dominate the four stations are Filopaludinajavanica and Tarebiagranifera. Makrozoobenthos density ranges from 40 – 295 ind/m2. Makrozoobenthos diversity index in the medium category 1.0 < H’ <3.322. Uniformity values ranged from 0,43 to 0,81 with low to high category. The highest uniformity index was found at station 3, and the lowest uniformity index was at station 4, while at station 1 and station 2 had a moderate uniformity index. The results of the macrozoobenthos community structure showed that the water quality of the pond irrigation channels in Legonkulon was classified as being medium polluted.