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 depressions are poorly drained with fine-textured organic, muck or mineral soils and standing water common throughout the growing season. Hardwood-dominated stands (especially Oregon Ash) may be considered a shrub swamp when they are not surrounded by conifer forests. Typical landscape mosaics for the Oregon Ash stands were very often formerly dominated by prairies and now by agriculture.

Flora

Red osier dogwood Nootka rose
Pacific willow Oregon ash

Fauna

Red winged blackbird Canada goose
Belted kingfisher Marsh wren
Painted turtle Western pond turtle
Pacific tree frog Muskrat