California oak woodland is a plant community found throughout the California chaparral and woodlands ecoregion of California and northwestern Baja California. Oak woodland is widespread at lower elevations in coastal California, interior valleys of the Coast Ranges, and in a ring around the California Central Valley grasslands. The dominant trees are oaks, interspersed with other broadleaf and coniferous trees, with an understory of grasses, herbs, geophytes, and shrubs. Oak savannas occur where the oaks are more widely spaced. A biocoenosis (alternatively, biocoenose or biocenose), termed by Karl Möbius in 1877, describes all the interacting organisms living together in a specific habitat (or biotope). ... The California chaparral and woodlands is a terrestrial ecoregion of central and southern California (United States) and northwestern Baja California (Mexico), located on the west coast of North America. ... This article is becoming very long. ... Baja California (literally lower California in Spanish) is the northernmost state of Mexico. ... The Pacific Coast Ranges are the series of mountain ranges that stretch along west coast of North America from Alaska to Mexico. ... The California Central Valley The California Central Valley dominates the central portion of the state of California. ... A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of starch) or water. ...

The Oak woodlands of Southern California and coastal Northern California are dominated by Coast Live Oak (Quercus agrifolia), but also include Valley Oak (Q. lobata), California Black Oak (Q. kelloggii), Canyon live oak (Q. chrysolepis), and other California oaks. The foothill oak woodlands around the Central Valley are dominated by Blue Oak (Q. douglasii) and Gray Pine (Pinus sabiniana). Southern California Downtown Los Angeles Skyline Southern California, sometimes abbreviated SoCal or colloquially, the Southland, is an informal name for the megalopolis and nearby desert that occupies the southern-most quarter of the U.S. state of California. ... Northern California, sometimes abbreviated NorCal, refers to the northern portion of the U.S. state of California. ... Binomial name Quercus agrifolia The Coast live oak, Quercus agrifolia, also called the California live oak, is an evergeen oak, highly variable and often shrubby, found in the coastal regions of southwestern North America from Mendocino County, California south to northern Baja California in Mexico. ... Binomial name Quercus lobata Nee The Valley oak is the largest of North american oaks and arguably the most majestic of its genus. ... Binomial name Quercus kelloggii Newb. ... The California Central Valley The California Central Valley dominates the central portion of the state of California. ... Binomial name Quercus douglasii The Blue oak (Quercus douglasii) is an oak in the white oak section of the genus, Quercus sect. ... Binomial name Pinus sabineana The Gray Pine (Pinus sabineana) is a pine endemic to California in the United States. ...

California oak woodland communities

• Oregon Oak woodland is found in northern California's Klamath-Siskiyou, Northern Coast Ranges, and southern Cascade Range, these woodlands are composed primarily of Oregon Oak (Quercus garryana), Interior Live Oak (Q. wislizenii), and Coast Live Oak, together with California Black Oak, Canyon Oak, Blue Oak, Pacific Madrone (Arbutus menziesii), California Bay (Umbellularia californica), Incense Cedar (Calocedrus decurrens), Coast Douglas Fir (Pseudtsuga menziesii), and Ponderosa Pine (Pinus ponderosa).
• Blue Oak woodland is found in the inner coast ranges and the Sierra Nevada foothills, surrounding the Central Valley. Primary species are Blue Oak and Interior Live Oak, together with Valley Oak, Canyon Oak, Coast Live Oak, California Scrub Oak (Q. berberidifolia), Gray Pine, California Buckeye (Aesculus californica), and Western Redbud (Cercis occidentalis).
• Coast Live Oak woodland is widespread in northern and southern California, and is dominated by Coast Live Oak, together with California Buckeye, Pacific Madrone, California Bay, and California Walnut (Juglans californica).
• Valley Oak woodland is found in the interior valleys of northern and central California, and is dominated by Valley Oak and Coast Live Oak, together with Gray Pine and Coulter Pine (Pinus coulteri).
• Island Oak woodland is found on the California Channel Islands, and is made up primarily of Island Oak (Q. tomentella) and Coast Live Oak, together with Canyon Oak, MacDonald Oak (Q. berberidifolia hybridized with Valley or other oaks), Catalina Ironwood (Lyonothamnus lyonii), and Bishop Pine (Pinus muricata).
• Engelmann Oak woodland is found in a few locations in the northern Peninsular Ranges of southern California, including the Santa Rosa Plateau. It consists mostly of Engelmann Oak (Q. engelmanii), together with Coast Live Oak.

The Klamath-Siskiyou forests are a temperate coniferous forest ecoregion of northwestern California and southwestern Oregon. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia through Washington and Oregon to the Shasta Cascade area of northern California. ... Binomial name Quercus wislizenii The Interior live oak, Quercus wislizenii is an evergeen oak, highly variable and often shrubby, found in the large areas of California in the United States. ... ... Species Calocedrus decurrens Conservation status: Secure Calocedrus formosana Conservation status: Vulnerable Calocedrus macrolepis Conservation status: Vulnerable The Incense-cedars, Calocedrus, are a genus of two to three species of coniferous trees in the cypress family Cupressaceae. ... Pseudotsuga menziesii var. ... Binomial name Pinus ponderosa Douglas ex C. Lawson Ponderosa Pine (Pinus ponderosa) is a widespread and very variable pine native to western North America. ... Binomial name Quercus berberidifolia Liebm. ... This page is a candidate for speedy deletion. ... Binomial name Pinus coulteri D. Don The Coulter Pine or Big-cone Pine (Pinus coulteri) is a native of the coastal mountains of southern California (United States) and northern Baja California (Mexico). ... The eight Channel Islands of California, off the west coast of the United States. ... Binomial name Quercus tomentella Engelm. ... Binomial name Pinus muricata The Bishop Pine (Pinus muricata) is a pine with a very restricted range: mostly California, USA, including some offshore islands, and a few locations in Baja California, Mexico, and always on or near the coast, from Trinidad Head in Humboldt County, California south to San Vicente... The Peninsular Ranges are a group of mountain ranges which stretch 900 miles from southern California to the southern tip of Baja California, part of the North American Coast Ranges that run along the Pacific coast from Alaska to Mexico. ... Binomial name Quercus engelmannii Greene The Engelmann Oak (Quercus engelmannii), also called the Pasadena Oak, is a species of oak in the white oak section Quercus sect. ...

Status and future of California oak woodlands

The Oaks 2040 survey estimates that 750,000 acres of California oak woodlands are seriously threatened by 2040 as a burgeoning state population makes ever more use of the wildland. This comprehensive survey includes oak woodland maps and inventory data for the ten oak types found in California. By evaluating this new information against current State of California economic growth projections, the location and extent of oak woodlands most at risk of development are identified.

References

• Dallman, Peter R. (1998). Plant Life in the World's Mediterranean Climates. California Native Plant Society–University of California Press; Berkeley.
• Gaman, Tom and Firman, Jeffrey (2006). Oaks 2040: The Status and Future of Oaks in California. Published by the California Oak Foundation, Oakland.
• Pavlik, Bruce M., Pamela C. Muick, Sharon G. Johnson,and Marjorie Popper (1991). Oaks of California. Cachuma Press and the California Oak Foundation; Los Olivos, California.
• Schoenherr, Allan A. (1992). A Natural History of California. University of California Press; Berkeley.

Los Olivos is a place in Santa Barbara County, California. ...

External links

• Oaks 2040: The Status and Future of Oaks in California