Abstract:

In order to understand the response of algae to flow velocity in Three Gorges Reservoir,a study of artificial controlled flow velocity influencing on algal growth and succession was investigated by employing the original water of Xiangxi Bay in 2008.Flow velocity was set to 0046 m/s,0075 m/s,0139 m/s and the static group 0 m/s.The variation of flow velocity had different impacts on the algal growth.Revealed by SNK multiple comparison,the abundance of Synedra sp.under 0139 m/s was significantly higher than any other treatment (p005),and under which the relative abundance was the highest.For 〖WTBX〗Pediastrum spp., the most abundant treatment was 0075 m/s.No significant difference was found among the four treatments in Microcystis spp.(p 005), but cell abundance and relative abundance under 0046 m/s was higher. The abundance of Cyclotella  sp.in water flow treatments was significantly higher than the static one (p005),but there was no significant difference among flow treatments (p005