PHYTOPLANKTON BIODIVERSITY AND POLLUTION BIOINDICATOR IN BOJONEGARA COASTAL WATERS, BANTEN BAY, INDONESIA

Coastal waters of Bojonegara in Banten Bay has a lot pressure from the surrounding environment, including industry and sand mining. The high intensity limited space encourage reclamation coastal areas which can trigger changes water quality. Research was conducted October to December 2019, aims analyze phytoplankton biodiversity pollution bioindicator waters. obtained through filtering 50 liters at depth 30 cm or surface Observations were also made on quality conditions transparency, depth, color, temperature, pH, salinity, dissolved oxygen (in-situ) turbidity, Total Suspended Solid (TSS), nitrate, nitrite, total phosphate (ex-situ). Data analysis performed abundance, diversity index, eveness dominance, similarity saprobic index. Based observations, it is known that found class Bacillariophyceae, Chlorophyceae, Cyanophyceae, Dinophyceae, Chrysophyceae. index values diversity, eveness, dominance each ranged 0.2223-1.0070; 0,1289-0,5664; 0.1550-0.8181, respectively. According these values, classifeied as mild moderate ecological pressure. similar are indicated by values. result Main Component Analysis (PCA) shows first component with 53.726% variance represented turbidity parameters, TSS, phosphate, DO. These parameters have most influence presence phytoplankton.