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Populus deltoides / Artemisia tridentata Woodland | Western Ecology Working Group of...
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Name: Populus deltoides / Artemisia tridentata Woodland Reference: Western Ecology Working Group of... Description: This mature riparian forest association is found in the San Juan River drainage in northwestern New Mexico and is probably present in adjacent southeastern Utah and northeastern Arizona. It occurs along low-gradient rivers of wide lowland valleys at elevations from 1640 to 1840 m (5375-6025 feet). Stands are located on high terraces well above the active channel (discharge ratio >5), and flooding is infrequent (50- to 100-year recurrence intervals). Soils have coarse loamy profiles throughout and are mostly young and undeveloped Entisols (Aquic and Typic Ustifluvents). Inceptisols can occur on higher terraces where soil development has not been disrupted by flooding (Fluventic Ustochrept). Mature Populus deltoides canopies are generally open (ranging between 30 and 40% cover), with Juniperus scopulorum, Elaeagnus angustifolia, and Salix amygdaloides in the subcanopy. The shrub layer is dominated by Artemisia tridentata with other upland species associates such as Ericameria nauseosa (= Chrysothamnus nauseosus) and Rhus trilobata. The presence of Artemisia, a common dominant from surrounding desert uplands, in these floodplain gallery forests is an indicator of infrequent flooding, perhaps because of regulated streamflows, or because the channel is actively cutting down or away from the forest. Grasses can be well-represented to abundant and are typically dominated by aridland species such as Sporobolus cryptandrus and Achnatherum hymenoides (= Oryzopsis hymenoides). Although a relatively dry type, some wetland indicator species still occasionally occur, such as Schoenoplectus pungens (= Scirpus pungens), Distichlis spicata, and Muhlenbergia asperifolia. Forbs are very scattered and low in diversity (16 species), of which 75% (12 species) are native. As a keystone species, the reproduction of Populus deltoides after flooding (and sufficient subsequent base flows) is critical to the sustainability of this community.  Accession Code: VB.CC.28122.POPULUSDELTOIDE Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 21-Jul-2004 to: 17-Nov-2014
	status: accepted Community's Parent: Populus deltoides Temporarily Flooded Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Rio Grande Cottonwood / Basin Big Sagebrush Woodland   UID: ELEMENT_GLOBAL.2.737568 NatureServe Explorer   Code: CEGL005966   Scientific: Populus deltoides ssp. wislizeni / Artemisia tridentata Woodland (convergence) and Synonyms: (undetermined) Populus deltoides (ssp. wislizeni, ssp. monilifera) / Artemisia tridentata Woodland