Donghu Lake, located at the northeastern part of Wuhan city, is a shallow lake with an area of 32km2. It is a hyper-eutrophic lake polluted by domestic sewage and industrial waste. The community structure, growth potential (AGP), cell density, chlorophyll.a and primary production of algae in nine areas of the lake were investigated in 1991~1993. Green algae is the most important component and blue-green algae as well as diatoms are subdominant groups in the lake areas. The dense bloom of blue-green algae ha...