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A.636 | EcoArt 2002
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Name: A.636
Reference: EcoArt 2002
Description: This alliance occurs throughout the Great Plains near rivers and large streams. It is dominated by ~Populus deltoides$ throughout its range. Secondary canopy species include ~Acer negundo$ throughout, ~Salix nigra$ (in the eastern part of its range), ~Fraxinus pennsylvanica$ and ~Ulmus americana$ (central and eastern), and ~Salix amygdaloides$ (central and western). ~Fraxinus pennsylvanica$ and ~Ulmus americana$ often increase in abundance and dominance as stands of this alliance age. ~Populus deltoides$ does not reproduce well in established stands. The understory composition and structure are variable. A shrub layer may be present, with species such as ~Salix$ spp., ~Symphoricarpos occidentalis$, and ~Prunus virginiana$ predominating. Sites experience seasonal floods, which, after receding, leave areas available for colonization. This process often favors the establishment of aggressive native and exotic plants. Among the species that are common in this alliance are ~Carex$ spp., ~Juncus$ spp., ~Spartina pectinata$ (in the east), ~Pascopyrum smithii$ (in the west), ~Elymus$ spp., ~Cenchrus longispinus, Melilotus officinalis$, and ~Equisetum$ spp. Typical exotics found in this alliance are ~Poa pratensis$ and ~Bromus$ spp. ^Stands of this alliance are found on level to gently sloping topography near rivers, streams, lakes, and ponds. The areas may have been very recently deposited by water action, or they may have been deposited earlier and occupied by other communities. The water table fluctuates with the level of the adjacent water body. This can lead to periods of flooding and soil saturation in the spring and after heavy rains and also to periods of drought when the water level falls in the summer and fall. The soils are silts, loams, and sands, and are derived from alluvial material. 
Accession Code: VB.CC.2278.A636
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: II.B.2.N.b
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: POPULUS DELTOIDES TEMPORARILY FLOODED WOODLAND ALLIANCE
  Code: A.636
  Common: Eastern Cottonwood Temporarily Flooded Woodland Alliance
(convergence) and Synonyms:
(undetermined) Populus deltoides Temporarily Flooded Woodland Alliance