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.
Flora
Dominant in wet sites:
Black cottonwood | Oregon ash |
Red alder | White alder |
Willow |
Dominant on drained sites, natural levees or high terraces:
Oregon ash | Oregon maple (3) |
Fauna
Black tailed deer | Red fox |
American beaver | Wood ducks |
Bald eagle | Hawks |
Great horned owl | Flicker |
Woodpeckers | Warblers |
Other songbirds | Rough skinned newt |
Pacific tree frogs |