The drawdown zone is the area at the edge of a body of water that is frequently exposed to the air due to changes in water level. Changes in water level can be caused by evaporation or by water usage in the case of reservoirs.
The drawdown zone is an extremely important habitat and has many plants and animals associated with it. It is especially important for insects. For example some species of insect will only lay their eggs in the mud within the drawdown zone. it is thought that they do this so the eggs are protected from fish.
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