Relationships between water quality and phytoplankton in the Bangpakong river
1997
Tidaporn Horabun
Studies of water quality relating to species composition and abundance of phytoplankton in the Bangpakong River were performed from January to December 1995. Water quality indexes were : water temperature 25.0 - 38.0 deg C, pH 6.0 - 8.8; transparency 5-110 cm; total suspended solid 4.0 - 2,112.0 mg/l; salinity 0-35 ppt; nitrate ND -1.1902 mg/l; nitrite ND - 0.6342 mg/l; ammonia ND - 1.906 mg/l; orthophosphate ND - 0.6526 mg/l; total phosphorus 0.0100 - 2.5115 mg/l. A total of 116 genera in 6 divisions of phytoplankton found comprised of 48 genera of Bacillariophyta, 42 of Chlorophyta, 10 of Pyrrophyta, 9 of Cyanophyta, 4 of Euglenophyta, and 3 of Chrysophyta. The phytoplankton always observed, quite often in large number, were a diatom group of Coscinodiscus, Odontella, Navicula and Nitzschia; and blue green algae of Oscillatoria. The quantity of total phytoplankton were positively related to water temperature, pH, transparency, total suspended solid, salinity, and nitrate; while those of Division Bacillariophyta positively to water temperature, pH, total suspended solid, salinity, and nitrate; Division Chlorophyta negatively to total suspended solid, salinity, nitrate, and total phosphorus; Division Pyrrophyta positively to transparency; and Division Euglenophyta positively to orthophosphate. The amount of chlorophyll a, ND - 84.99 mg/cubic m were positively related to water temperature, total suspended solid, ammonia and total phosphorus, as well as to the abundance of phytoplankton in Division Bacillariophyta and the total phytoplankton.
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Эту запись предоставил Kasetsart University