Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

ROLE OF DAPHNIA (Daphnia spp.) IN SHALLOW LAKES UNDER EUTROPHIC CONDITIONS (Pages : 21 - 26)

Eutrophication problem is common in all over the world. State of eutrophication defines the physico-chemical properties of water. Besides, it has a strong influence on the biotic communities living in that water bodies. On the flip side, grazers (species that grazes on phytoplankton) are believed to have substantial impact on the state of eutrophication. This paper testifies the effect of grazing by Daphnia spp. on the state of eutrophication therefore, physico-chemical properties of water in shallow eutrophic lake. The study was conducted with a mesocosm experimental set-up installed at the roof top of IHE Building, Delft, the Netherlands. Four experimental combinations (manipulating grazers (Daphnia spp.), nutrients and light) with six replicates were used for the experiment. Statistical test were performed to analyze the outcome of the experiment. The outcome of the experiment suggests that the grazing of Daphnia spp. significantly reduce the water turbidity under high eutrophic condition. Moreover, the experiment showed that Daphnid grazing has significant effect on DO and pH under elevated nutrient concentrations while, it failed to show any significance on NO3-N, PO4-P, electrical conductivity and water temperature under both low and higher nutrient concentrations.Download