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A.340 | EcoArt 2002
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Name: A.340
Reference: EcoArt 2002
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.1965.A340
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: I.B.2.N.e
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: POPULUS TREMULOIDES SEASONALLY FLOODED FOREST ALLIANCE
  Common: Quaking Aspen Seasonally Flooded Forest Alliance
  Code: A.340
(convergence) and Synonyms:
(undetermined) Populus tremuloides Seasonally Flooded Forest Alliance