Abstract
The condition of Jakarta Bay which receives a high load of nutrients causes the bay to experience phytoplankton blooms. One of the phytoplankton groups that often experience the blooms are diatoms (Bacillariophyceae) – in addition to its existence which are naturally abundant. This study aims to analyze the dynamics of diatom distributions in Jakarta Bay. Samples were taken in July to October 2017 at 15 sampling stations. The distribution of diatoms seem to be high in the central part of the bay (September and October) due to the higher Secchi depth than that in the river estuary; and higher nutrients level that that in the offshore area. Meanwhile, the distribution in the other months seem to be more influenced by nutrients (July) and seasonal variables such as water current, and wind (August).
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