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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 (1150-2100 and 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, Betula occidentalis is usually found at elevations higher than Alnus rhombifolia. These species do co-occur near the upper elevational limit of Alnus rhombifolia on tributaries with fair to good stream channel stability ratings. This implies that Betula occidentalis 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. Alnus rhombifolia is codominant with Betula occidentalis, both occur with high cover. Populus balsamifera ssp. trichocarpa (= Populus trichocarpa), Abies grandis and Pseudotsuga menziesii may also be associated. The understory is characterized by a dense, multi-layered, and species-rich deciduous shrub layer. Species commonly present include Crataegus douglasii, Cornus sericea, Ribes oxyacanthoides ssp. irriguum (= Ribes irriguum), Rosa woodsii, Rhus glabra, Philadelphus lewisii, Prunus virginiana, Sambucus caerulea, and Salix scouleriana. The herbaceous component of this plant association has not been described.  Accession Code: VB.CC.21612.ALNUSRHOMBIFOLI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Alnus rhombifolia Temporarily Flooded Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Alder / Water Birch Forest   UID: ELEMENT_GLOBAL.2.686031 NatureServe Explorer   Code: CEGL000632   Scientific: Alnus rhombifolia / Betula occidentalis Forest   Common: White Alder / River Birch (convergence) and Synonyms: (undetermined) Alnus rhombifolia / Betula occidentalis Forest