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Alnus rubra - Acer macrophyllum Rainforest Group | NatureServe Biotics 2019
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Name: Alnus rubra - Acer macrophyllum Rainforest Group Reference: NatureServe Biotics 2019 Description: This lowland hardwood or mixed hardwood-conifer forest group occurs in the Pacific Northwest from northern British Columbia to northern California. These forests are composed of mostly deciduous broadleaf species sometimes with varying components of conifers. <i>Alnus rubra</i> or <i>Acer macrophyllum</i> are the major tree species. Companion species are common and specific species present depend on the geographic location. Conifers, including <i>Abies grandis, Picea sitchensis, Pseudotsuga menziesii, Thuja plicata</i>, and/or <i>Tsuga heterophylla</i>, can be codominant (up to one-third relative cover). Other major dominant broadleaf species are <i>Quercus garryana, Frangula purshiana</i>, and <i>Cornus nuttallii</i>. Conifers tend to increase in abundance with time in the absence of major disturbance, although the hardwoods, particularly <i>Acer macrophyllum</i>, can persist in the overstory. The understory is characterized by deciduous shrubs such as <i>Acer circinatum, Corylus cornuta, Oemleria cerasiformis, Rubus ursinus, Symphoricarpos albus</i>, and/or <i>Toxicodendron diversilobum</i>, but evergreen shrubs, including <i>Gaultheria shallon</i> and <i>Mahonia nervosa</i> and forbs, such as <i>Polystichum munitum</i> and <i>Oxalis oregana</i>, can be dominant. This group occurs on valley terraces and slopes at low elevations in the mountains of the Pacific Northwest coast and interior valleys west of the high Cascade Range. It is the dominant forest and woodland surrounding cities and towns of the Pacific Northwest, and component species are indicators of recent and past disturbance, both human-induced and natural. It also occurs on steep slopes and bluffs that are subject to mass movements on a periodic basis.  Accession Code: urn:lsid:vegbank.org:commConcept:40025-{8DAD3694-D12D-49C8-9A8E-586697231B94} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 09-Nov-2015 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Picea sitchensis - Sequoia sempervirens Rainforest Macrogroup This Community's Level: Group This Community's Children: Show/Hide   Alnus rubra - Acer macrophyllum Forest Alliance   Alnus rubra - Acer macrophyllum - Pseudotsuga menziesii Forest Alliance		Names:   UID: ELEMENT_GLOBAL.2.833258 NatureServe Explorer   Code: G237   Scientific: Alnus rubra - Acer macrophyllum Rainforest Group