Phytoplankton Diversity in Jakarta Bay Estuary, Indonesia

Abstract

Abstract Phytoplankton plays an important role in aquatic ecosystems and is one of the biological parameters that can be used as bioindicators to describe conditions, quality, and environmental changes. Jakarta Bay is polluted by various wastes originating from industry, domestic, and sea transportation for fishing activities, which causes a decrease in water quality in Jakarta Bay. This study aims to reveal the composition of phytoplankton and its relationship with the physical and chemical parameters of the waters that empty into Jakarta Bay. The study was conducted in September 2021 at three sampling stations in estuary areas. Station 3 was the most polluted area from industrial waste, only found phytoplankton from the group of Cyanophyta (61.57%) and Euglenophyta (38.43%). Meanwhile, station 2 with the highest concentration of chlorophyll-a, contaminated with domestic waste was dominated by Cyanophyta (29.26%), Euglenophyta (11.79%), Chrysophyta (39.74%), and Chlorophyta (19.21%) groups. The water quality of the two sampling stations greatly affects the composition and abundance of phytoplankton.