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A.259 | EcoArt 2002
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Name: A.259
Reference: EcoArt 2002
Description: This alliance, found in the northern Great Plains, is composed of forests found along watercourses. Communities in this alliance have moderate to closed tree canopies composed almost exclusively of deciduous trees. In the Dakotas, the canopy height is between 4.7 and 8 m, but it may be taller in Minnesota. The shrub layer can be sparse to moderately dense. The herbaceous layer is also variable, often varying inversely with the tree canopy density. Across the range of this alliance, the most abundant tree species are ~Fraxinus pennsylvanica$ and ~Ulmus americana$. ~Celtis$ spp., ~Populus deltoides$, and ~Quercus macrocarpa$ are often present and become more common in the eastern portion of this alliance's range. ~Populus tremuloides$ and ~Tilia americana$ occur only in the east. Common shrubs include ~Juniperus scopulorum$ (in the west), ~Rosa$ spp., ~Prunus virginiana, Symphoricarpos occidentalis$ (in the west), and ~Vitis$ spp. Herbaceous species of this alliance include ~Carex$ spp., ~Piptatherum micranthum (= Oryzopsis micrantha)$ (in the west), and ~Taraxacum$ spp. ^Stands of this alliance are found on upland sites where the water table is within the rooting zone for part of the year. These sites are very rarely flooded to the surface. Most stands are found at the bases of slopes near streams, rivers, lakes, or in intermittent watercourses. The mineral soils are deep and moderately to poorly drained. They are typically silty clay, clay, or silty loam. 
Accession Code: VB.CC.1858.A259
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.a
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: FRAXINUS PENNSYLVANICA - (ULMUS AMERICANA) FOREST ALLIANCE
  Code: A.259
  Common: Green Ash - (American Elm) Forest Alliance
(convergence) and Synonyms:
(undetermined) Fraxinus pennsylvanica - (Ulmus americana) Forest Alliance