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Acer negundo - Alnus incana ssp. tenuifolia Riparian Forest | NatureServe Biotics 2019
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Name: Acer negundo - Alnus incana ssp. tenuifolia Riparian Forest Reference: NatureServe Biotics 2019 Description: This association is found in the mountainous regions of northern New Mexico in the Rio Grande and Pecos River watersheds. It occurs in lower montane regions, typically in the riparian zone of canyon floors. Elevations range between 1970 and 2160 m (6470-7100 feet). Stands occur on alluvial terraces and bars adjacent to perennial stream channels with gradients up to 5%. Soils include moist Entisols (Typic Fluvaquents and Oxyaquic Udifluvents) that are shallow and have a sandy to loamy layer over a gravelly-cobbly layer, or loamy Mollisols derived from dacite and rhyolitic alluvium. The ground surface is characterized by shrubs rooted among rhizomatous grasses, exposed gravels and soil-intermixed litter patches. The community is at least partially flooded every other year or completely inundated, on average, every four years. Flood debris is often evident near the banks as driftlines or larger debris piles. This riparian forest is characterized by a closed canopy (80-95%) dominated by <i>Acer negundo</i>. <i>Alnus incana ssp. tenuifolia</i> may be present in the subcanopy; other tree species are uncommon or absent. Shrubs may vary from poorly represented to abundant, with <i>Alnus incana ssp. tenuifolia</i> the most abundant. Occasionally <i>Salix irrorata</i> and a variety of other shrubs may be present. The herbaceous layer is also very diverse but variable, with over 70 grasses and forbs reported for the type.  Accession Code: urn:lsid:vegbank.org:commConcept:34592-{5C3B18DE-CC32-4F8A-8AED-AADA26492F70} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 14-Apr-2009 to: ongoing
	status: accepted Community's Parent: Acer negundo - Alnus incana ssp. tenuifolia - Cornus sericea Riparian Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.737507 NatureServe Explorer   Code: CEGL005940   Translated: Box-elder - Thinleaf Alder Riparian Forest   Scientific: Acer negundo - Alnus incana ssp. tenuifolia Riparian Forest (convergence) and Synonyms: (similar) Acer negundo - Alnus incana ssp. tenuifolia Forest (similar) Acer negundo - Alnus incana ssp. tenuifolia Forest