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Fraxinus pennsylvanica - Ulmus americana Great Plains Forest Alliance | NatureServe Biotics 2019
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Name: Fraxinus pennsylvanica - Ulmus americana Great Plains Forest Alliance
Reference: NatureServe Biotics 2019
Description: This alliance is found in the northern and central Great Plains. Tree canopy is variable, ranging from open to closed. Trees are often short (5-10 m tall) and dominant trees are <i>Fraxinus pennsylvanica</i> and <i>Ulmus americana</i>. <i>Acer negundo</i> can also be common in some stands and <i>Populus deltoides</i> may be scattered. The shrub layer can be sparse to dense. <i>Prunus virginiana</i> and <i>Symphoricarpos occidentalis</i> are common shrubs. Sites are usually found in mesic ravines and draws that concentrate the available precipitation by receiving runoff from higher uplands and trapping drifting snow. Some stands may be inundated for brief periods in the spring or after heavy rains but flooding does not persist. Rarely, stands of this alliance can be found upper terraces of rivers or streams or on north- or east-facing hillsides. Fires from adjacent upland prairies do not usually move through these sites due to the more mesic conditions and the lower landscape position. 
Accession Code: urn:lsid:vegbank.org:commConcept:38498-{D0CE1C5C-30F6-40B6-9F0F-EBB82541CCBC}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 18-Dec-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899335 NatureServe ExplorerNatureServe Explorer logo
  Code: A3211
  Translated: Green Ash - American Elm Great Plains Forest Alliance
  Common: Great Plains Ash - Elm Ravine Forest
  Scientific: Fraxinus pennsylvanica - Ulmus americana Great Plains Forest Alliance