Beavers reduce fire impacts in spruce stands by creating a mosaic of habitats that act as natural firebreaks.

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"Not only do the appetites of moose and beavers help determine when a northern forest will reach this flammable spruce stage, but beavers also indirectly affect the extent of the burn. The mosaic of aspen and willow stands, meadows, ponds, and wetlands they maintain amid the flammable spruce forests can serve as natural firebreaks, keeping fires smaller than they would be in homogeneous landscapes. Both the moose and beaver then benefit from the effects of fire because it clears the way for the regrowth of aspen and willows in the nutrient-laden ash." (Baskin 1997: 168)

Work of Nature: How the Diversity of Life Sustains UsIsland PressJanuary 1, 1997
Yvonne Baskin

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