Organic pollution detection based on protozoa saprobity index at Bojonegara waters of Banten Bay

Abstract

One of the problems of the aquatic environment is organic pollution which can disturb the balance of the ecosystem. The study was conducted to analyze organic pollution based on protozoa saprobity index and to analyze some environmental parameters that affect the protozoan population in the waters of Bojonegara Banten Bay. Descriptive method with survey techniques was used in this study, consisting of 3 observation stations determined based on the presence of different industrial activities. Data were analysed through calculation of the saprobic index, diversity index and abundance, while the analysis of the relationship of several environmental parameters was conducted using the PCA (Principal Component Analysis) program. The results showed that 12 genera of Protozoa were identified with a total of 102 individuals. The waters of Bojonegoro, Banten Bay are already polluted organically with moderate pollution criteria (Beta-meso saprobic) with saprobic index values ranging from 2.30-2.47, while the environmental parameters that have the highest influence on organic pollution are brightness, temperature, pH, turbidity, total dissolved solid (TDS), dissolved oxygen, and biological oxygen demand (BOD).