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Populus angustifolia / Alnus oblongifolia Woodland | Western Ecology Working Group of...
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Name: Populus angustifolia / Alnus oblongifolia Woodland Reference: Western Ecology Working Group of... Description: This community type occurs at elevations ranging between 1840 and 2120 m (6050-6950 feet) in narrow ravines or canyons in the Rio Grande and Gila River basins in southwestern and central New Mexico and adjacent Arizona. Limited data suggest that this type may be found along alluvial bars and along streambanks in positions above bankfull stream levels (discharge ratios range from 1.0 to 13.3). Streams have moderate to high gradients (1.0-4.5%), beds that are gravelly/cobbly, and flows that can be either perennial or intermittent. Flooding is estimated to recur anywhere from 2 to 25 years. Soils are poorly developed, well-drained, sandy and rocky. They can be somewhat wet within rooting depths during high flow periods (Oxyaquic Ustifluvents and Torrifluvents). Canopies are dense (>60% cover) and codominated by <i>Populus angustifolia</i> and <i>Alnus oblongifolia</i>. When cottonwoods are few in number, these trees are usually larger and more mature than the alders. Both species show good reproduction as saplings and seedlings. Young <i>Acer negundo</i> saplings are also common beneath the tree canopy and occasionally extend into the canopy. <i>Salix gooddingii, Acer negundo, Juglans major, Juniperus deppeana, Juniperus monosperma</i>, and <i>Juniperus scopulorum</i> are also possible in the understory. <i>Brickellia californica</i> can be common to abundant in the shrub layer and may be indicative for this type. The herbaceous layer is characteristically grassy and moderately diverse (44 herb species recorded for the type). <i>Poa pratensis</i> is the most common grass, sometimes codominating with <i>Bouteloua curtipendula</i> and <i>Bouteloua gracilis</i>. Thirteen wetland indicators have been recorded for the type, including <i>Glyceria striata, Equisetum arvense, Mimulus guttatus, Rumex crispus, Veronica americana, Rudbeckia laciniata, Oxypolis fendleri</i>, and <i>Cicuta douglasii</i>.  Accession Code: VB.CC.32632.CEGL000938 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.687460 NatureServe Explorer   Translated: Narrowleaf Cottonwood / Arizona Alder Woodland   Scientific: Populus angustifolia / Alnus oblongifolia Woodland   Code: CEGL000938