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Populus tremuloides Seasonally Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Populus tremuloides Seasonally Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: This alliance occurs locally in seasonally flooded areas in the Rocky Mountain region. Stands in this alliance are restricted to sites saturated by seepage from springs and streams from snowmelt. They occur below seeps on gentle slopes, wet draws and flats, and in depressions along streambank terraces. Aspects are variable. Soils are often fine-textured, poorly drained with high organic content, but in some stands the alluvial soils are coarse-textured and permit rapid groundwater movement. The water table is typically at or near the soil surface in the spring but may drop more than 1 m by midsummer. Vegetation included in this broad-leaved deciduous forest alliance is characterized by a somewhat closed to closed canopy of trees that is dominated by Populus tremuloides. In northern stands Populus balsamifera ssp. trichocarpa may be present to codominant. Scattered conifer trees may occur throughout the range and contribute up to 25% of the tree canopy. The shrub layers in these communities are typically absent or sparse, commonly consisting of scattered Alnus spp., Lonicera involucrata, Ribes montigenum, Rosa woodsii, Salix spp., or Symphoricarpos albus. The highly diverse herbaceous layer is typically dense and dominated by mesic graminoids and forbs like Calamagrostis canadensis, Equisetum arvense or Ranunculus alismifolius. The exotic forage species may have significant cover in stands grazed by cattle or near hay meadows. Diagnostic of this alliance is the dominance of Populus tremuloides in a forest that is flooded for extended periods during the growing season and has a high water table.  Accession Code: VB.CC.18619.POPULUSTREMULOI 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: Populus tremuloides Seasonally Flooded Forest Alliance   Translated: Quaking Aspen Seasonally Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.126312 NatureServe Explorer   Code: A.340