Questions 1. Try to explain the following observations: \"One investigation show
ID: 213532 • Letter: Q
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Questions 1. Try to explain the following observations: "One investigation showed when large, shallow ponds were stocked with cyprinid fish, the zooplankton consisted of mall cladocerans, Bosmina, Ceriodaphnia, and rotifers. This lead to a decrease in water transparency with the development of small nanoplankton algae. If fish were setectively removed, the zooplankton changed to larger cladocerans, particularly Daphnia longispina and the abundance of rotifer decreased. Then water transparency increased as the phytoplankton shifted to smaller densities of larger species." (4 marks)Explanation / Answer
Ans- this observation states that the transparency of water is decreased by the increase in population of rotifers. Zooplankton feeds on rotifers and keep the water transparent.
The fishes feeds on zooplankton due to which the phytoplankton or rotifer growth increase. Removal of fishes will help in survival of zooplankton and they will make water transparent by feeding on rotifers.
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