The coastal sage scrub plant community is divided into three geographical subtypes—
northern coastal scrub,
southern coastal scrub, and
maritime succulent scrub. The coastal scrub communities are divided into three regions: •
Northern Coastal Scrub and
Coastal Prairie, which extends from
San Luis Obispo to
Oregon. •
Coastal Sage scrub, which extends from
Ensenada, Baja California to
Monterey. •
Maritime Succulent Scrub, which can be found in San Diego County and
Baja California. • The
Northern Coastal Scrub consists of
prairie, which is terraces with deep
alluvial soils, and scrub, which is found on steeper slopes and ravine areas. Evergreen shrubs and subshrubs, which are soft leaves. They are found in semi-open with a height of 2–3 meters, with multiple layers. Some examples of the plant species that can be found are Bush monkeyflower (
Mimulus aurantiacus), Poison oak (
Toxicodendron diversilobum), Coffee berry (
Frangula californica), Golden yarrow (
Eriophyllum confertiflorum). California sagebrush (
Artemisia californica) can be found in
Coastal Sage Scrub community, especially in
Orange County. Some other plant species that can be found is also giant coreopsis (
Coreopsis gigantea), Californian black sage (
Salvia mellifera), California buckwheat (
Eriogonum fasciculatum), and Californian white sage (
Salvia apiana). Plant species that can be found in
Maritime Succulent Scrub is coast prickly pear (
Opuntia littoralis), coast barrel cactus (
Ferocactus viridescens), cliff spurge (
Euphorbia misera), bush rue (
Cneoridium dumosum), and
Dudleya spp.
Northern coastal scrub Northern coastal scrub occurs along the
Pacific Coast from the northern
San Francisco Bay Area to southern
Oregon. It frequently forms a landscape mosaic with the
California coastal prairie plant community. The predominant plants are low
evergreen shrubs and
herbs. Characteristic shrubs include
coyote brush (
Baccharis pilularis),
yerba santa (
Eriodictyon californicum),
coast silk-tassel (
Garrya elliptica),
salal (
Gaultheria shallon), and
yellow bush lupine (
Lupinus arboreus). Herbaceous species include
western blue-eyed grass (
Sisyrinchium bellum),
Douglas iris (
Iris douglasiana), and
grasses.
Southern coastal scrub Southern coastal scrub is mostly found along the maritime
Central Coast region, and the terraces and mountains with coastal climate influence in
Southern California. Its distribution extends from the southwestern San Francisco Bay Area in the north, through
Big Sur,
Vandenberg Air Force Base, the
Oxnard Plain, the
Los Angeles Basin, most of
Orange County, parts of
Riverside County, coastal
San Diego County, and the northwestern region of Baja California state in Mexico, including the areas around
Tijuana and
Ensenada. (
Pinus torreyana) and southern coastal scrub,
Santa Rosa Island. ;Southern California The metropolitan areas of
Los Angeles,
San Diego, and
Tijuana are located in the southern coastal scrublands, and most of the scrublands have been lost to
urbanization and
agriculture. The plants of this community prefer the mild maritime climates found along Southern California's coastline.
World Wildlife Fund estimates that only 15 percent of the coastal sage scrublands remain undeveloped. Some of the remaining southern coastal scrub in Los Angeles County can be found in dunes under the takeoff path at
Los Angeles International Airport—LAX, in the coastal
Santa Monica Mountains National Recreation Area, and at
the Robert J. Bernard Field Station at the
Claremont Colleges. In San Diego County, the
Camp Pendleton Marine Corps Base protects larger areas, and the
Marine Corps Air Station Miramar has
vernal pools and the endemic mint
Pogogyne abramsii. One of the largest remaining areas of inland coastal sage scrub is found in the
Temescal Mountains of Riverside County. A few
rare and
endangered species occur in southern coastal scrub habitats. For example, the
coastal California gnatcatcher (
Polioptila californica californica) is a threatened
bird species
endemic to the coastal sage scrublands. Other endemic fauna includes the
El Segundo blue butterfly in the LAX dunes; and the
Palos Verdes blue butterfly (
Glaucopsyche lygdamus palosverdesensis), at only one site on the
Palos Verdes Peninsula. The endangered
Torrey pine (
Pinus torreyana) is the dominant tree at
Torrey Pines State Natural Reserve in San Diego, one of only two known stands of this
pine species. ==See also==