California montane chaparral and woodlands

California montane chaparral and woodlands

California montane chaparral and woodlands in the Transverse Ranges.
Ecology
Biome Mediterranean forests, woodlands, and scrub
Bird species 222[1]
Mammal species 78[1]
Geography
Area 20,400 km2 (7,900 sq mi)
Country United States
State California
Conservation
Habitat loss 2.7345%[1]
Protected 63.53%[1]

The California montane chaparral and woodlands is an ecoregion defined by the World Wildlife Fund, spanning 7,900 square miles (20,000 km2) of mountains in the Transverse Ranges, Peninsular Ranges, and Coast Ranges of southern and central California. The ecoregion is part of the larger California chaparral and woodlands ecoregion, and belongs to the Mediterranean forests, woodlands, and scrub biome.[2]

Geography and climate

The ecoregion spreads from low foothills up to the highest peaks of the following ranges: San Bernardino Mountains, San Jacinto Mountains, San Gabriel Mountains, Santa Susana Mountains, Santa Monica Mountains, Topatopa Mountains, Tehachapi Mountains, San Rafael Mountains, Santa Ynez Mountains, and the long Santa Lucia Mountains. The region's Mediterranean climate is hot and dry in the summer and cool and wet in the winter.[2]

The wide elevation range and characteristic climate produce a variety of natural communities, from chaparral to mixed evergreen forest to alpine tundra.[2]

Ecology

Flora

Shrublands of chamise, manzanita species, and scrub oak tend to dominate the lower elevations of California montane chaparral and woodlands. This ecoregion contains several oak species, including coast live oak, canyon live oak (golden-cup oak), interior live oak, tan oak, and Engelmann oak. It has eight endemic conifer species.

A mosaic of different manzanita species and closed-cone pine forest appears at higher elevations. Bigcone Douglas-fir, Pseudotsuga macrocarpa, is a notable resident of some of these communities. The Mediterranean California Lower Montane Black Oak-Conifer Forest plant community occurs here.

Mixed evergreen forest occurs from 4,500 to 9,500 feet (1,400 to 2,900 m) and includes incense-cedar, sugar pine, white fir, Jeffrey pine, ponderosa pine, and western juniper. Higher elevations to 11,500 feet (3,500 m) support subalpine forests of limber pine, lodgepole pine, and Jeffrey pine.[2]

Fauna

The region contains many species of small vertebrate, including the white-eared pocket mouse and different species of kangaroo rats. The monarch butterfly also comes to the area during the winter months and settles around the coast. The area includes some larger predators such as the mountain lion, bobcat, coyote, and ring-tailed cats.[2]

Conservation status

Approximately 30 percent of California montane chaparral and woodlands remains intact. About 70 percent has been lost due to degradation activities of humans.[3] Montane chaparral is threatened chiefly by development, grazing, logging, conversion to vineyards, and fire suppression.[4]

This is an ongoing threat notably in Southern California, but also in its northernmost reaches in Santa Clara County, where population pressure is most intense.

State and federal fish and wildlife agencies, and environmental associations are attempting to conserve the remaining intact ecoregion. The U.S. Forest Service efforts include timber harvest conservation measures in areas with endangered tree species and high endemic and relict species plant communities. Much of the range is within the Los Padres National Forest, Angeles National Forest, and San Bernardino National Forest. Mixed conifer and closed-cone pine forests have been heavily impacted by air pollution. Air quality has improved in southern montane areas around the Los Angeles Basin, since implementation of smog reduction policies and practices in the latter 20th century.[2]

See also

References

  1. 1 2 3 4 Hoekstra, J. M.; Molnar, J. L.; Jennings, M.; Revenga, C.; Spalding, M. D.; Boucher, T. M.; Robertson, J. C.; Heibel, T. J.; Ellison, K. (2010). Molnar, J. L., ed. The Atlas of Global Conservation: Changes, Challenges, and Opportunities to Make a Difference. University of California Press. ISBN 978-0-520-26256-0.
  2. 1 2 3 4 5 6 "California montane chaparral and woodlands". Terrestrial Ecoregions. World Wildlife Fund. Retrieved 2012-10-22.
  3. ↑ Berbach, Chris (2003). "California montane chaparral and woodlands" (PDF).
  4. ↑ Hogan, C.Michael (2008). "Aesculus californica". Globaltwitcher.com. N. Stromberg.
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Coordinates: 34°48′N 119°06′W / 34.8°N 119.1°W / 34.8; -119.1

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