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Populus balsamifera ssp. trichocarpa - Alnus rubra / Rubus spectabilis Riparian Forest | NatureServe Biotics 2019
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Name: Populus balsamifera ssp. trichocarpa - Alnus rubra / Rubus spectabilis Riparian Forest Reference: NatureServe Biotics 2019 Description: This association occurs on well-developed floodplains of lowland rivers in western Oregon, western Washington, and coastal British Columbia. It is flooded periodically, but typically not every year, by overbank floods, upon which its long-term persistence in the landscape is probably dependent. Soils are alluvium that are well-drained. The relatively closed deciduous tree canopy is dominated in the uppermost layer by <i>Populus balsamifera ssp. trichocarpa</i> up to about 50 m tall. A subcanopy layer of <i>Alnus rubra</i> is present and variable in percent cover. Scattered conifers are sometimes present, especially in lower layers (e.g., <i>Abies grandis, Thuja plicata</i>). The understory is dominated by the deciduous shrub <i>Rubus spectabilis</i>, which can be quite dense. Several other shrubs may be present in lesser amounts. The herb layer is variable in quantity and composition. Some typical species include <i>Tolmiea menziesii, Stachys chamissonis var. cooleyae, Athyrium filix-femina, Circaea alpina, Claytonia sibirica, Urtica dioica</i>, and <i>Polystichum munitum</i>. The dominance of <i>Populus balsamifera ssp. trichocarpa</i> and <i>Rubus spectabilis</i>, combined with a greater abundance of <i>Alnus rubra</i> than <i>Acer macrophyllum</i>, is probably diagnostic.  Accession Code: urn:lsid:vegbank.org:commConcept:32289-{164D510D-BAE1-49A6-9D8C-03A386666CB3} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 01-Oct-2002 to: ongoing
	status: accepted Community's Parent: Fraxinus latifolia - Populus balsamifera ssp. trichocarpa - Alnus spp. Riparian Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.684232 NatureServe Explorer   Code: CEGL003407   Translated: Black Cottonwood - Red Alder / Salmonberry Riparian Forest   Scientific: Populus balsamifera ssp. trichocarpa - Alnus rubra / Rubus spectabilis Riparian Forest (convergence) and Synonyms: (similar) Populus balsamifera ssp. trichocarpa - Alnus rubra / Rubus spectabilis Forest (similar) Populus balsamifera ssp. trichocarpa - Alnus rubra / Rubus spectabilis Forest (similar) CEGL003407