Aspects of the phytoplankton ecology in Lake Chivero, Harare, Zimbabwe
Mzime Ndebele-Murisa
Broschiertes Buch

Aspects of the phytoplankton ecology in Lake Chivero, Harare, Zimbabwe

Aspects of the ecology of the phytoplankton community of Lake Chivero an investigation of the toxicity of algal blooms

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Lake Chivero was built in 1952 to supply drinking water to the city of Harare and became eutrophic due to discharges of sewage effluent. Algal blooms have become a major problem whilst cases of gastroenteritis and liver cancer have increased dramatically over the last decades. To evaluate the potential health threat, the phytoplankton community in the reservoir was investigated. Inorganic nutrient (2.4-3.0 mg P l-1 and 1.4-3.2 mg N l -1) and conductivity (1433-368 mS cm-1) as well as phytoplankton biomass concentrations (0.8-7.6 mgl-1) were very high. Primary production had increased significa...