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Pseudotsuga menziesii - Sequoia sempervirens / Rhododendron macrophyllum / Vaccinium ovatum Forest | Western Ecology Working Group of...
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Name: Pseudotsuga menziesii - Sequoia sempervirens / Rhododendron macrophyllum / Vaccinium ovatum Forest Reference: Western Ecology Working Group of... Description: These giant conifer forests are found in the coastal fog zone of southwestern Oregon and northwestern California. They occupy steep slopes and ridges of coastal mountains, below 500 m in elevation (900 m in California). The canopy of these forests is dominated by Pseudotsuga menziesii and Sequoia sempervirens trees which are often greater than 60 m tall. There is almost always a subcanopy of Lithocarpus densiflorus, usually between 10-30 m tall, occasionally codominant with Umbellularia californica. Lithocarpus densiflorus (1-70%) also dominates the shrub layer with both Rhododendron macrophyllum (2-60%) and Vaccinium ovatum (10-70%). Gaultheria shallon and Mahonia nervosa (= Berberis nervosa) are often found, and in moist pockets Polystichum munitum and Oxalis oregana can be found. Other forbs include Lotus crassifolius, Arnica cordifolia and Xerophyllum tenax. This was the dominant forest community along the coastal fog belt in extreme southern Oregon and in extreme northwestern California. Farther south, Sequoia sempervirens completely dominates the forests, and farther north, it disappears. Both fire and windthrow play an important part in the maintenance of these giant forests. As a result, some ecologists believe these would be climax Lithocarpus densiflorus forests. However, since the canopy trees can live over 1000 years and are extremely resistant to fire, this seems unlikely. This association is the only Pseudotsuga menziesii - Sequoia sempervirens association which occurs with dense evergreen shrubs. The only other type from southwestern Oregon occurs on moist toeslopes and valleys and has a dense tall-forb understory dominated by Polystichum munitum, Oxalis oregana, and Clintonia andrewsiana.  Accession Code: VB.CC.27384.PSEUDOTSUGAMENZ 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: Sequoia sempervirens - Pseudotsuga menziesii Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Douglas-fir - Redwood / California Rhododendron / Evergreen Blueberry Forest   UID: ELEMENT_GLOBAL.2.690080 NatureServe Explorer   Scientific: Pseudotsuga menziesii - Sequoia sempervirens / Rhododendron macrophyllum / Vaccinium ovatum Forest   Code: CEGL000082 (convergence) and Synonyms: (undetermined) Pseudotsuga menziesii - Sequoia sempervirens / Rhododendron macrophyllum / Vaccinium ovatum Forest