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Bottomland Forests

Bottomland forests are generally used to describe forests which are comprised of both hardwood and softwood tree species that occur on low-elevation, alluvial floodplains or lower terraces of rivers and streams.(2) These forests are linear in character. The term “bottomland hardwoods” is generally used to describe both the dominant forest tree species and the major forest types that occur on floodplains. Riverine flooding and the succession that occurs after major flooding events are the major natural processes that drive this system. Very early-successional stages can be sparsely vegetated or dominated by herbaceous vegetation.



Dominant in wet sites:

Black cottonwoodOregon ash
Red alderWhite alder

Dominant on drained sites, natural levees or high terraces:

Oregon ashOregon maple (3)


Black tailed deerRed fox
American beaverWood ducks
Bald eagleHawks
Great horned owlFlicker
Other songbirdsRough skinned newt
Pacific tree frogs