The analysis of physicochemical parameters indicates that certain environmental factors are essential to the growth of planktons in dam. These parameters include nutrients, dissolved oxygen, pH and temperature. Rotifers were the most dominant zooplankton group observed during the study period in Charghad dam. This illustrates both their role and importance in energy transfer. This rich zooplankton may be a source of important food for wading birds and sedentary abundant downstream. A better understanding of the structure, evolution and functioning of the aquatic and natural ecosystem is certainly a better preservation of biodiversity. The interactions between the components of biodiversity are fundamental to the understanding of how this ecosystem functions. This study would still be continued to better understand the structure, functioning and ecology of zooplankton community of Charghad dam.