International Journal of Fisheries and Aquatic Research

Authors
Heti Herawati, Isni Nurruhwati, Yayat Dhahiyat

Abstract
This research aims to estimate the trophic level status of the waters of the Jatigede Reservoir in terms of the phytoplankton community structure. This is an effort to support the sustainable management of Jatigede Reservoir. The method used is purposive sampling was conducted in June - September 2018. Sampling was conducted at 4 stations with 6 replications. The parameters measured include temperature, light transparency, TSS, pH, DO, BOD, Nitrate, Phosphate and phytoplankton. The results of the research show that the quality of the Jatigede Reservoir waters falls into the class II and III categories according to PP 82 of 2001 which supports the life of aquatic organisms including phytoplankton. There are 53 species of phytoplankton with abundance ranging from 15.945 – 644.300 individuals / L. The diversity index (H') is at 1,01 and the index evenness is 0,09 which is categorized as low evenness. Based on phytoplankton abundance, Jatigede Reservoir is in trophic status, eutrophic.