Abstract:
Plankton is used as a bioindicator of water conditions because plankton has tolerance limits
to certain substances, because the presence of plankton in water can provide information
about water conditions. Phytoplankton as a biological indicator can determine water quality
either through the approach of species diversity and indicator species. Phytoplankton as a
biological indicator not only determines the level of water fertility, but also the phase of
pollution that occurs in the waters. The study was conducted for 6 (six) months in the waters
of the Negara River, which is located in the South Hulu Sungai Regency, South Kalimantan.
Sungai Negara is an ecosystem that is important for the life of living things and the
surrounding environment. The presence of plankton in waters can provide information about
the Negara of the waters. So the purpose of this research is to obtain data on the
composition, and diversity of phytoplankton in the waters of the Sungai Negara. The results of the research on the composition, yield and diversity of phytoplankton in the waters of the Negara River were mostly by the type of Navicula sp. which was found at all stations for each sampling.
