Investigation on the plankton in newly constructed Dafangying reservoir of Hefei city
The resource of plankton in Dafangying reservoir was investigated in 2005.The results show that there are 99 species of phytonplankton and 76 species of zooplankter.The average densities of phytoplankton and zooplankton are 302.11×104 cell·L-1 and 18 891 ind·L-1,respectively,and the average biomass for them are 2.2683 mg·L-1 and 1.8171 mg·L-1,respectively.In which,Cyanophyta Chlorophyta Bacillariophyta is predominated.The species composition and standing crop of plankton vary with different regions and seasons.According to the Margalef′method,Dafangying reservoir belongs to both Scant filth types and β-mesosaprobic by the filth type.Besides,a suggestion is proposed to improve the water quality of Dafangying reservoir by using bio-control technology.