The zone of a lake or pond below the open-water zone, where no light reaches.
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The shallow zone of a lake or pond where light reaches the bottom and nurtures plants.
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A treeless wetland ecosystem where plants such as grasses grow.
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The zone of a pond or lake that extends from the littoral zone and that is only as deep as light can reach.
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A wetland ecosystem in which shrubs and trees grow.
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An area of land that is periodically under water or whose soil contains a great deal of moisture.
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