Name:
Pinus muricata - Pinus radiata Woodland Alliance
Reference:
NatureServe Biotics 2019
Description:
This alliance includes closed-cone pine stands dominated by endemic tree taxa <i>Pinus contorta var. bolanderi, Pinus radiata</i>, and/or <i>Pinus muricata</i> (on the Channel Islands). <i>Pinus attenuata</i> may be dominant or codominant in some occurrences. Stands may be pygmy woodland expressions where indurated subsoil underlies acidic sands (ancient marine terraces). Other associated plant species include <i>Arctostaphylos hookeri, Arctostaphylos nummularia, Arctostaphylos tomentosa, Gaultheria shallon, Ledum groenlandicum, Morella californica, Quercus pacifica, Arctostaphylos tomentosa ssp. crustacea, Baccharis pilularis, Comarostaphylis diversifolia ssp. planifolia, Galium nuttallii ssp. insulare, Diplacus parviflorus, Rhododendron macrophyllum</i>, and <i>Vaccinium ovatum</i>. The lichen and moss component of this alliance is very diverse, includes <i>Cladonia</i> spp., and can be abundant in these communities. This alliance occurs on the mainland in central and northern California, and on Santa Cruz and Santa Rosa islands, and Guadalupe Island (Baja California, Mexico). These forests and woodlands are limited to coastal areas with moderate maritime climate and likely receive more annual precipitation than nearby coastal chaparral, in part due to fog drip. They occur on marine sedimentary, non-metamorphosed features, often on podsols or on sterile sandstone on dry ridges, headlands, uplifted maritime terraces, rocky ridges, and sand dunes. They are found primarily on upper positions of slopes, though occasionally lower and in canyons, at predominately north-facing, cooler aspects. Soils in dry sites are shallow, acidic, and may be inadequately drained; soils on seasonally flooded sites are sterile with cemented hardpans. Elevation ranges from sea level to 450 m.
Accession Code:
urn:lsid:vegbank.org:commConcept:39307-{786C5D83-E915-49F2-9D0E-9C2CBF1ED8E4}
Plot-observations of this Community Concept:
0
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