Penentuan Status Trofik Melalui Beberapa Pendekatan (Studi Kasus: Waduk Cirata)

ABSTRACT Cirata Reservoir is a cascade reservoir in West Java that is used for floating cage fish farming. High organic content originated from the residue of the feed causes eutrophication of reservoir waters. The purpose of this study was to assess the trophic status of the Cirata Reservoir through several trophic states index. The results shows that the presence of the phytoplankton community, in response to water quality, was dominated by groups tolerant to high nutrient concentration. The highest value is found in locations with dense of floating cage activity, that increases with increasing water depth. All approaches used indicate that the Cirata Reservoir is classified as eutrophic to hyper-eutrophic. Keywords: Cyanophyceae, eutrophic, trophic states