KAJIAN KONTAMINASI LOGAM TERHADAP BIOTA LAUT DI TELUK JAKARTA

This study aims to analyze the contamination of lead, copper and cadmium in Jakarta Bay, to analyze the relationship between sediment with phytoplankton growth, T. chuii and abnormalities A. beccari and to analyze the spatial distribution of metal contamination in Jakarta Bay. Sediment samples were taken using Mc Smith Intrye, and analyzed for metals using AAS. Bioassay sediment conducted during 96 hour exposure to phytoplankton, T. chuii. Secondary data like current, salinity and temperature were provided to analyze oceanographic condition of Jakarta Bay. Results showed that concentration of Pb, Cd, and Cu in Ancol and Sunter estuary was above standard value provided by the CCME (1995). Indonesia had not have sediment quality standards so it still refers to standards of other countries. Generally, bioassay showed that sediment inhibits growth of T. chuii (20.75-65.98%) and caused 31.05% abnormality of A. beccari in Ancol estuary. Ancol and Sunter estuary are the worst region compare than East and West of Jakarta Bay. Conclusion from this research were Pb, Cd and Cu in estuary Ancol and Sunter measured above standard value provided by the CCME and had to bioaccumulated in sediment. Sediments are exposed for 96 hours can reduce the growth of phytoplankton T. chuii and increase percentage of abnormalities of A. beccari. This condition might affect ecosystem in Jakarta Bay because of producer and deposit feeder function. The spatial distribution of Pb, Cd and Cu in sediments is strongly influenced by the distance from the mainland and ocean currents. Self purification could control contamination but still considered carrying capacity of ecosystem and load of contaminant