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…

Shrub swamps are typically located in depressions, around lakes or ponds or on river terraces. They tend to flood seasonally and are dominated by shrubs or trees that are rooted in hydric soils. These…

Marshes are seasonally or continually flooded and occur in depressions, around lakes or ponds and along slow-flowing streams. Shallow marshes support dominant herbaceous vegetation which is rooted in…

Wet prairies were once a common habitat in the floodplain of the Willamette River. These habitats occur on poorly drained clay soils or shallow soils above bedrock. Seasonal flooding creates anaerobic…