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Alnus rhombifolia / Betula occidentalis Forest | Western Ecology Working Group of...
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Name: Alnus rhombifolia / Betula occidentalis Forest Reference: Western Ecology Working Group of... Description: This plant association is described from data collected in the Snake and Salmon river corridors, within the Blue Mountains ecoregional section. The plant association occurs within a relatively discrete elevational band (350-640 m [1150-2100 feet] and 550-760 m [1800-2500 feet], respectively) in the deeply incised terrain of the Snake and Salmon canyons. The association occurs on stable and unstable stream channel substrates. In this region of west-central Idaho, <i>Betula occidentalis</i> is usually found at elevations higher than <i>Alnus rhombifolia</i>. These species do co-occur near the upper elevational limit of <i>Alnus rhombifolia</i> on tributaries with fair to good stream channel stability ratings. This implies that <i>Betula occidentalis</i> occupies sites with less frequent disturbance, and with cold air drainage from higher elevations. This forest plant association is dominated by broad-leaved, deciduous tree species. <i>Alnus rhombifolia</i> is codominant with <i>Betula occidentalis</i>, both occur with high cover. <i>Populus balsamifera ssp. trichocarpa (= Populus trichocarpa), Abies grandis</i> and <i>Pseudotsuga menziesii</i> may also be associated. The understory is characterized by a dense, multi-layered, and species-rich deciduous shrub layer. Species commonly present include <i>Crataegus douglasii, Cornus sericea, Ribes oxyacanthoides ssp. irriguum (= Ribes irriguum), Rosa woodsii, Rhus glabra, Philadelphus lewisii, Prunus virginiana, Sambucus caerulea</i>, and <i>Salix scouleriana</i>. The herbaceous component of this plant association has not been described.  Accession Code: VB.CC.34282.CEGL000632 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.2.686031 NatureServe Explorer   Translated: White Alder / Water Birch Forest   Scientific: Alnus rhombifolia / Betula occidentalis Forest   Code: CEGL000632