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Pinus muricata Forest Alliance | Western Ecology Working Group of...
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Name: Pinus muricata Forest Alliance Reference: Western Ecology Working Group of... Description: Stands of the Pinus muricata Forest Alliance (A.121) are found in a coastal maritime climate, occurring within 12 km of the ocean. Stands are found on headlands and low hills. Elevations range from near sea level to 400 m. In the southern portion of the range stands are found on northern exposures. Annual precipitation, in the form of rain, varies from 63-37 cm from north to south. The distinct summer dry season is ameliorated by frequent summer fogs that contribute a great deal of moisture. Throughout most of this alliance's range, three-quarters of summer days are foggy. Stands occur on a variety of substrates, including diatomaceous shales, weathered basalt, and old beach sand deposits. All these soils are shallow, acidic, and poorly drained. In some cases, the soils are podzolized and flooded with perched water over an iron hardpan in the B horizon. Diatomaceous soils have a high water-retaining capacity. Stands of this alliance are dominated by Pinus muricata (one of its varieties). Only in the northern portion of the range does Pinus muricata mix with other conifers. These can include Pinus contorta var. contorta, Pinus contorta var. bolanderi, Pinus radiata, Pseudotsuga menziesii, Cupressus goveniana ssp. pygmaea, and/or Sequoia sempervirens. Both shrub and herbaceous layers can vary from absent to abundant. Island stands are notably different in species composition compared to mainland stands. Species composition also varies from north to south; with northern stands rich in ericaceous species. Shrub species common throughout the range include Vaccinium ovatum, Toxicodendron diversilobum, Rubus spp., and Rhamnus spp. Common forbs include the ferns Polystichum munitum and Pteridium aquilinum.  Accession Code: VB.CC.21743.PINUSMURICATAFO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Pinus muricata Forest Alliance   Translated: Bishop Pine Forest Alliance   UID: HIGHER_CLASS_UNIT.2.124805 NatureServe Explorer   Code: A.121