... Journal of Water and Environment Technology, Vol.2, No.2, 2004 - 75 - LAKE EUTROPHICATION MODEL BASED ON THE IMPACT OF THE ZOOPLANKTON COMMUNITY ON PHYTOPLANKTON SUCCESSION Masaki ... observed. On the whole, some important relations between phytoplankton and zooplankton were clarified. The biomass of rotifers was correlated with Microcystis. On the other hand, the biomass of Daphnia, ... of phytoplankton. That is why we can observe the impact of zooplankton community on phytoplankton succession was more obvious in the winter experiment than in the Fig. 4 Dynamics of plankton...