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Pinus contorta - Populus tremuloides Seasonally Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Pinus contorta - Populus tremuloides Seasonally Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: These riparian forests have been described from valleys, drainages and basins in the eastern Cascade Mountains of Oregon. Elevations range from 1100-2135 m. Stands are often relatively narrow, occurring in active floodplains, low terraces along stream channels, and on margins of meadows. Sites are flat to gently sloping, and are seasonally flooded. Substrates are moderately deep to deep, alluvial soil with textures ranging from loamy sand to silt clay loams. They are saturated in the spring then dry out by late summer, with the water table often dropping about 1 m. Parent materials are pumice alluvium or air-laid pumice that blanket this area. Stands have a sparse to dense, mixed evergreen needle-leaved and deciduous, broad-leaved tree canopy (25-90%) that is codominated by Pinus contorta var. murrayana and Populus tremuloides. These seral stands are often dominated by one of the tree species depending on the time since the last disturbance. The relatively sparse to dense short-shrub layer (28-80% cover) is dominated by the cold-deciduous species Spiraea douglasii with Arctostaphylos uva-ursi, Rosa woodsii, and several species of Salix, including Salix boothii, Salix geyeriana, and Salix lemmonii, often present. The herbaceous layer is sparse to moderately dense (5-60% cover). It is often dominated by the perennial graminoid Carex angustata, but other herbaceous species may include Achillea millefolium, Elymus glaucus, Fragaria virginiana, Galium boreale, and Maianthemum stellatum. Adjacent stands include upland and riparian conifer forests dominated by Pinus contorta and various wetlands dominated by herbaceous and shrub species of Carex and Salix.  Accession Code: VB.CC.19563.PINUSCONTORTAPO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Pinus contorta - Populus tremuloides Seasonally Flooded Forest Alliance   Translated: Lodgepole Pine - Quaking Aspen Seasonally Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125210 NatureServe Explorer   Code: A.440