California chaparral and woodlands: Difference between revisions
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|name = California chaparral and woodlands |
|name = California chaparral and woodlands |
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| biome = [[Mediterranean forests, woodlands, and scrub]] |
| biome = [[Mediterranean forests, woodlands, and scrub]] |
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| image = Los Padres S.jpg |
| image = Los Padres S.jpg |
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| country 1 = United States, Mexico |
| country 1 = United States, Mexico |
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| state = [[California]] |
| state = [[California]] |
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| state1 = [[Baja California]] |
| state1 = [[Baja California]] |
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| area=121000 |
| area=121000 |
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==Fire== |
==Fire== |
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Chaparral, like most Mediterranean shrublands, is highly fire resilient and historically burned with high-severity, stand replacing events every 30 to 100 years.<ref>{{cite book|last1=Keeley|first1=JE|first2=FW|last2=Davis|year=2007|chapter=Chaparral|url=http://www.werc.usgs.gov/fileHandler.ashx?File=/Lists/Products/Attachments/3457/K2007_Chaparral_TVC.pdf|title=Terrestrial Vegetation of California|pages= |
Chaparral, like most Mediterranean shrublands, is highly fire resilient and historically burned with high-severity, stand replacing events every 30 to 100 years.<ref>{{cite book|last1=Keeley|first1=JE|first2=FW|last2=Davis|year=2007|chapter=Chaparral|url=http://www.werc.usgs.gov/fileHandler.ashx?File=/Lists/Products/Attachments/3457/K2007_Chaparral_TVC.pdf|title=Terrestrial Vegetation of California|pages=339–366|editor1-first=MG|editor1-last=Barbour|editor2-first=T|editor2-last=Keeler-Wolf|editor3-first=AA|editor3-last=Schoenherr|publisher=University of California Press|location=Los Angeles}}</ref> Historically, Native Americans burned chaparral to promote grasslands for textiles and food.<ref>{{cite book|last=Vale|first=TR|year=2002|title=Fire, Native Peoples, and the Natural Landscape|publisher=Island Press|location=Washington, DC}}</ref> Though adapted to infrequent fires, chaparral plant communities can be exterminated by frequent fires especially with climate change induced drought.<ref name=Syphard>{{cite journal|last1=Syphard|first1=AD|first2=VC|last2=Radeloff|first3=JE|last3=Keeley|first4=TJ|last4=Hawbaker|first5=MK|last5=Clayton|first6=SI|last6=Stewart|first7=RB|last7=Hammer|display-authors=4|year=2007|title=Human influence on California fire regimes|journal=Ecological Applications|volume=17|issue=5|pages=1388–1402|url=http://www.werc.usgs.gov/OLDsitedata/seki/pdfs/k2007_syphard_human%20influence.pdf|pmid=17708216}}</ref><ref name=Pratt>{{cite journal|last1=Pratt|first1=RB|first2=AL|last2=Jacobsen|first3=AR|last3=Ramirez|first4=AM|last4=Helms|first5=CA|last5=Traugh|first6=MF|last6=Tobin|first7=MS|last7=Heffner|first8=SD|last8=Davis|display-authors=4|year=2014|title=Mortality of resprouting chaparral shrubs after a fire and during a record drought: physiological mechanisms and demographic consequences|journal=Global Change Biology|volume=20|issue=3|pages=893–907|doi=10.1111/gcb.12477|pmid=24375846|url=https://www.csub.edu/~ajacobsen/Pratt%20et%20al.%202014%20GCB%20Mortality%20of%20resprouting%20shrubs.pdf}}</ref> Today, frequent accidental ignitions can convert chaparral from a native shrubland to nonnative annual grassland and drastically reduce species diversity, especially under global-change-type drought.<ref name=Syphard/><ref name=Pratt/> |
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==Human influence== |
==Human influence== |
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==External links== |
==External links== |
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{{Commons category|California chaparral and woodlands}} |
{{Commons category|California chaparral and woodlands}} |
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*[http://web.archive.org/web/20090107144630/http://www.worldwildlife.org/wildworld/profiles/g200/g121.html World Wildlife Fund: California Chaparral and Woodlands ecoregion (121)] |
*[http://web.archive.org/web/20090107144630/http://www.worldwildlife.org/wildworld/profiles/g200/g121.html World Wildlife Fund: California Chaparral and Woodlands ecoregion (121)] |
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*[http://www.californiachaparral.org/ Official '''California Chaparral Institute''' website] |
*[http://www.californiachaparral.org/ Official '''California Chaparral Institute''' website] |
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*[http://www.cas.vanderbilt.edu/bioimages/ecoregions/51201frame.htm California Coastal Sage and Chaparral images at bioimages.vanderbilt.edu] ([http://www.cas.vanderbilt.edu/bioimages/ecoregions/51201.htm slow modem version]) |
*[http://www.cas.vanderbilt.edu/bioimages/ecoregions/51201frame.htm California Coastal Sage and Chaparral images at bioimages.vanderbilt.edu] ([http://www.cas.vanderbilt.edu/bioimages/ecoregions/51201.htm slow modem version]) |
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Revision as of 04:42, 3 February 2016
 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (March 2012) |
| California chaparral and woodlands | |
|---|---|
 | |
| Ecology | |
| Biome | Mediterranean forests, woodlands, and scrub |
| Geography | |
| Area | 121,000 km2 (47,000 sq mi) |
| States | |
The California chaparral and woodlands is a terrestrial ecoregion of lower northern, central, and southern California (United States) and northwestern Baja California (Mexico), located on the west coast of North America. It is an ecoregion of the Mediterranean forests, woodlands, and scrub Biome, and part of the Nearctic ecozone.
Setting
Three sub-ecoregions
The California chaparral and woodlands ecoregion is subdivided into three smaller ecoregions.[1]
- California coastal sage and chaparral ecoregion: In southern coastal California and northwestern coastal Baja California, as well as all the Channel Islands of California and Guadalupe Island.
- California montane chaparral and woodlands: In southern and central coast adjacent and inland California, covering some of the mountains of: the Coast Ranges; the Transverse Ranges; and the western slopes of the northern Peninsular Ranges.
- California interior chaparral and woodlands: In central interior California surrounding the California Central Valley cover the foothills and the Transverse Ranges and Sierra Nevada.
Locations
Most of the population of California and Baja California lives in these ecoregions, which includes the San Francisco Bay Area, Ventura County, the Greater Los Angeles Area, San Diego County, and Tijuana.
The California Central Valley grasslands ecoregion, as well as the coniferous Sierra Nevada forests, Northern California coastal forests, and Klamath-Siskiyou forests of northern California and southwestern Oregon, share many plant and animal affinities with the California chaparral and woodlands. Many botanists consider the California chaparral and woodlands, Sierra Nevada forests, Klamath-Siskiyou forests, and Northern California coastal forests as a single California Floristic Province, excluding the deserts of eastern California, which belong to other floristic provinces. Many Bioregionalists, including poet Gary Snyder, identify the central and northern Coast Ranges, Klamath-Siskiyou, the Central Valley, and Sierra Nevada as the Shasta Bioregion or the Alta California Bioregion.
Flora
The ecoregion includes a great variety of plant communities, including grasslands, oak savannas and woodlands, chaparral, and coniferous forests, including southern stands of the tall coast redwood (Sequoia sempervirens). The flora of this ecoregion also includes tree species such as Gray or foothill pine (Pinus sabiniana), Scrub oak (Quercus dumosa), California buckeye (Aesculus californica), the rare Gowen cypress (Cupressus goveniana), the rare Monterey cypress (Cupressus macrocarpa), and a wealth of endemic plant species, including the extremely rare San Gabriel Mountain liveforever (Dudlea densiflora), Catalina mahogany (Cercocarpus traskiae), and the threatened most beautiful jewel-flower (Streptanthus albidus ssp. Peramoenus).[1]
Fauna
Species include the endangered California gnatcatcher (Polioptila californica), Costa's hummingbird (Calypte costae), coast horned lizard (Phrynosoma coronatum), and rosy boa (Lichanura trivirgata). Other animals found here are the endangered Heermann kangaroo rat (Dipodomys heermanni), Santa Cruz kangaroo rat (Dipodomys venustus), and white-eared pocket mouse (Perognathus alticolus).[1]
Another notable insect resident of this ecoregion is the rain beetle (Plecoma sp.) It spends up to several years living underground in a larval stage and emerges only during wet-season rains to mate.
Fire
Chaparral, like most Mediterranean shrublands, is highly fire resilient and historically burned with high-severity, stand replacing events every 30 to 100 years.[2] Historically, Native Americans burned chaparral to promote grasslands for textiles and food.[3] Though adapted to infrequent fires, chaparral plant communities can be exterminated by frequent fires especially with climate change induced drought.[4][5] Today, frequent accidental ignitions can convert chaparral from a native shrubland to nonnative annual grassland and drastically reduce species diversity, especially under global-change-type drought.[4][5]
Human influence
The region has been heavily affected by grazing, logging, dams and water diversions, and intensive agriculture and urbanization, as well as competition by numerous introduced or exotic plant and animal species. Some unique plant communities, like southern California's Coastal Sage Scrub, have been nearly eradicated by agriculture and urbanization. As a result, the region now has many rare and endangered species, including the California condor (Gymnogyps californianus).
See also
References
- ^ a b c "California Chaparral & Woodlands". World Wildlife Fund. Retrieved 2012-06-15. (material included verbatim under the CC BY-SA 3.0 license
- ^ Keeley, JE; Davis, FW (2007). "Chaparral". In Barbour, MG; Keeler-Wolf, T; Schoenherr, AA (eds.). Terrestrial Vegetation of California (PDF). Los Angeles: University of California Press. pp. 339–366.
- ^ Vale, TR (2002). Fire, Native Peoples, and the Natural Landscape. Washington, DC: Island Press.
- ^ a b Syphard, AD; Radeloff, VC; Keeley, JE; Hawbaker, TJ; et al. (2007). "Human influence on California fire regimes" (PDF). Ecological Applications. 17 (5): 1388–1402. PMID 17708216.
- ^ a b Pratt, RB; Jacobsen, AL; Ramirez, AR; Helms, AM; et al. (2014). "Mortality of resprouting chaparral shrubs after a fire and during a record drought: physiological mechanisms and demographic consequences" (PDF). Global Change Biology. 20 (3): 893–907. doi:10.1111/gcb.12477. PMID 24375846.
- Bakker, Elna (1971) An Island Called California. University of California Press; Berkeley.
- Dallman, Peter R. (1998). Plant Life in the World's Mediterranean Climates. California Native Plant Society–University of California Press; Berkeley.
- Ricketts, Taylor H; Eric Dinerstein; David M. Olson; Colby J. Loucks; et al. (1999). Terrestrial Ecoregions of North America: a Conservation Assessment. Island Press; Washington, DC.
- Schoenherr, Allan A. (1992). A Natural History of California. University of California Press; Berkeley.
External links
- World Wildlife Fund: California Chaparral and Woodlands ecoregion (121)
- Official California Chaparral Institute website
- California Coastal Sage and Chaparral images at bioimages.vanderbilt.edu (slow modem version)
- California Interior Chaparral and Woodlands images at bioimages.vanderbilt.edu — (slow modem version)
- California Montane Chaparral and Woodlands images at bioimages.vanderbilt.edu — (slow modem version)
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- California chaparral and woodlands
- Mediterranean forests, woodlands, and scrub
- Mediterranean forests, woodlands, and scrub in the United States
- Ecoregions of California
- Ecoregions of Mexico
- Flora of California
- Forests of California
- Natural history of the California chaparral and woodlands
- Natural history of Baja California
- Plant communities of California
- Nearctic ecozone