Abstract
The experiment was conducted by small perspex ring groove, which generated infinitely long water flow, under axenic condition and constant temperature and light, to understand the effects of water flow onMicrocystis aeruginosagrowth in early summer and autumn raw water. The results showed that the algae growth was promoted and the specific growth rate was accelerated by water flow. The maximum biomass ofM. aeruginosain autumn raw water was higher than in early summer raw water at every flow rate. The optimum flow rate ofM. aeruginosain early summer and autumn raw water were 25 cm·s-1and 35cm·s-1, respectively. The phenomenon may be the interaction of the colloid produced by death and decomposition of algae, and colony formation inM. aeruginosaunder fluid motion. Therefore, The decomposition and morphology ofMicrocystishave an important role to growth and reproduction of algae, the results provided the scientific basis for revealing algal blooms.
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