PNW Forested Wetland Soils Organic Soils Develop under prolonged saturated conditions Histosols (peat, muck, or mucky peat) Gelisols (permafrost or gelic materials 1m bgs) Organic carbon content of 12 to 18% or more organic carbon Limited to depressions and alluvial fans in southern PNW (range from 0.5 to 250 ha in size) Large expanses on flat or sloping terrain in NE British Columbia and Central/SE Alaska (range from 5 to 800 ha in size) Mineral Soils Majority of forested wetlands associated with mineral soils (southern PNW) Alluvial floodplain, mountainside, hillside seeps, depressions Fine grain clay loam/silty clay loam/gravelly sandy loam, often with a layer of decomposed organic material Support more diverse forested community
{}