Print Report
A3796 Acer negundo - Fraxinus anomala - Celtis laevigata var. reticulata Riparian Woodland Alliance
Type Concept Sentence: This alliance consists of riparian woodlands dominated by Acer negundo, Fraxinus anomala, and/or Celtis laevigata var. reticulata. Common associates include Alnus incana, Betula occidentalis, Brickellia grandiflora, Brickellia longifolia, Cornus sericea, Quercus gambelii, Rhus trilobata, and others. It is found on intermittently dry streams and/or in slickrock canyons, and occurs on the Colorado Plateau and south into Arizona and New Mexico.
Common (Translated Scientific) Name: Box-elder - Singleleaf Ash - Netleaf Hackberry Riparian Woodland Alliance
Colloquial Name: Box-elder - Singleleaf Ash - Netleaf Hackberry Riparian Woodland
Hierarchy Level: Alliance
Type Concept: This alliance consists of riparian woodlands dominated by Acer negundo, Fraxinus anomala, and/or Celtis laevigata var. reticulata. Common associates include Alnus incana, Betula occidentalis, Brickellia grandiflora, Brickellia longifolia, Cornus sericea, Quercus gambelii, Rhus trilobata, and others. Cottonwoods and willows are usually not present and, if present, are in very low abundance. It is found adjacent to streams and rivers, seeps and springs, near the base of colluvial slopes, and on alluvial terraces or in slickrock canyons, and occurs on the Colorado Plateau and south into Arizona and New Mexico.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: These are broad-leaved deciduous woodlands typically with the canopy 10-20 m tall, with a sparse shrub layer and dense to sparse herbaceous layer.
Floristics: Stands are dominated by Fraxinus anomala, Acer negundo, and/or Celtis laevigata var. reticulata, usually in monotypic stands but occasionally can be seen together. Other trees present may include Juniperus osteosperma, Pinus edulis, or Pseudotsuga menziesii. Associated tall shrubs include Amelanchier alnifolia, Betula occidentalis, Forestiera pubescens, Quercus gambelii, Rhus trilobata, and Salix exigua. Short shrubs contribute low cover and include Ephedra viridis, Ericameria nauseosa, Holodiscus dumosus, Rhus trilobata, Symphoricarpos rotundifolius, and the vines Clematis ligusticifolia and Vitis arizonica. The herbaceous layer may have Elymus glaucus, Equisetum arvense, Equisetum hyemale, Maianthemum stellatum, Mentha arvensis, and Phalaris arundinacea. Exotic graminoids such as Poa pratensis or Agrostis stolonifera can be abundant.
Dynamics: With scouring floods, Acer negundo may survive only if it grows on upper colluvial slopes. This may provide a seed source for regeneration after flooding and deposition. Female trees of the dioecious Acer negundo are better adapted to growing along the channel edge and are recommended over male trees for restoration of disturbed streambanks. Acer negundo is not rhizomatous, but has strong roots that provide streambank stability.
Environmental Description: This vegetation is restricted to mesic sites, such as near seeps, springs and ephemeral stream channels, on immediate riverbanks, within 2 m of the active channel, or streambanks immediately below perennial or seasonal springs or on lower colluvial slopes where additional soil moisture is available. Sites are flat to gently sloping and may have any aspect. Substrates are nearly always derived from colluvium but often have been transported or redistributed by water to form alluvial deposits. Soils are shallow to deep and well-drained to rapidly drained. Soil texture varies widely and can be coarse-loamy to fine-loamy and generally has large amounts of gravel and cobble. The water table is seasonally within 1 m of the surface.
Geographic Range: This alliance ranges from Idaho to Montana south through Nevada, Utah, Colorado, Arizona and New Mexico.
Nations: CA,US
States/Provinces: AZ, CO, ID, MT, NM, NV, TX, UT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899848
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
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