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Pinus contorta Temporarily Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Pinus contorta Temporarily Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: This is a coniferous forest alliance found at moderate (montane to lower subalpine) elevations in mountains of central and eastern Oregon, from 1220 m to over 2280 m. Sites include edges of meadows, streamside terraces, lakeshores, and flat to slightly concave drainages and basins. Valleys where it occurs are broad, low-gradient, and usually flat-bottomed. Soils in central Oregon are derived from pumice alluvium, which has weathered into silts, sandy loams and silty clay loams. Wetter stands will have a significant organic component, sometime with a peat layer. The soil surface will often be slightly flooded at snowmelt, but by late summer the water table will drop to >1 m depth. It occurs wherever Pinus contorta is invading Deschampsia caespitosa-dominated meadows. Pinus contorta is the only tree present in the reported stands, and is the only species represented in the regeneration layer. Deschampsia caespitosa dominates the herbaceous layer, often with very high cover (>30%), and is usually distributed evenly throughout a stand. Other herbaceous species present will vary depending on soil moisture and elevation. Forbs can include Thalictrum occidentale, Fragaria spp., Trifolium longipes, Symphyotrichum spathulatum (= Aster occidentalis), Mimulus primuloides, Achillea millefolium, Antennaria spp., Potentilla spp., and others. Graminoids that can be present include Juncus balticus, Koeleria macrantha, Calamagrostis canadensis, Danthonia californica, or Carex spp. Other woody species are typically not present.  Accession Code: VB.CC.23661.PINUSCONTORTATE 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 Temporarily Flooded Forest Alliance   Translated: Lodgepole Pine Temporarily Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.124719 NatureServe Explorer   Code: A.175