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Alnus rhombifolia / Sierran Forest | Western Ecology Working Group of...
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Name: Alnus rhombifolia / Sierran Forest Reference: Western Ecology Working Group of... Description: This association is only known from Yosemite National Park in California, and the following description is based on occurrences there. Information about its global characteristics is not available without additional inventory. It is likely that this association ranges throughout the western slope of the Sierra Nevada. Stands are found at low to mid elevations (1340-1525 m [4400-5000 feet]) on concave, hummocky and undulating, southeast- to north-facing, flat to moderately steep (0-20%) slopes. These sites tend to be along drainages, floodplains or streambeds that are intermittently flooded to permanently flooded. In general, <i>Alnus rhombifolia</i> stands require permanent moisture, whether subterranean or on the surface. In intermittently flooded streams, the stands are associated most regularly with deeper pools or short stretches of more permanently flooded substrate. Soils are generally rocky with textures ranging from sand to sandy loam and of granitic parent material. Soil is somewhat poorly to rapidly draining. Disturbance is low to medium. Stands are found forming an intermittent to continuous canopy. The shrub layer is open to continuous and the herb layer is open. This association is dominated by <i>Alnus rhombifolia</i> in narrow bands often associated with perennial steams. <i>Calocedrus decurrens</i> is often an important codominant tree. <i>Cornus nuttallii</i> and <i>Abies concolor</i> are usually present. Other species that may be found in this association include <i>Adenocaulon bicolor, Rubus parviflorus, Claytonia perfoliata (= Montia perfoliata), Galium aparine, Pteridium aquilinum, Athyrium filix-femina</i>, and <i>Boykinia major</i>. <i>Dryopteris arguta</i> may be common at some sites. <i>Carex tompkinsii</i> is a rare species that may be found in this association.  Accession Code: VB.CC.34276.CEGL008693 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.2.683847 NatureServe Explorer   Translated: White Alder / Sierran Forest   Scientific: Alnus rhombifolia / Sierran Forest   Code: CEGL008693