A beaver dam or beaver impoundment is a dam built by beavers; it creates a pond which protects against predators and holds food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species and ecosystem engineers.
A beaver dam or beaver impoundment is a dam built by beavers; it creates a pond which protects against predators and holds food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species and ecosystem engineers.
Source: Wikipedia "Beaver dam" · CC BY-SA 4.0
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