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Most exotic plants in California are currently restricted to low elevations, although some invasive species may have the potential to reach the subalpine zone. If climate change does indeed warm regions where the subalpine zone occurs, conditions there may become more conducive to threats such as invasive species as the local ecosystem is
The Pinyon-Juniper Woodland Zone extends down to 5,000 feet (1,500 m) elevation. [4] Below 5,000 feet (1,500 m), there is not enough precipitation to support trees. The zones below this elevation are the Sagebrush Scrub Zone, Saltbush Scrub Zone, and the Alkali Sink Zone. These zones are distinguished by soil salinity. [4]
The climate of California varies widely from hot desert to alpine tundra, depending on latitude, elevation, and proximity to the Pacific Coast. California 's coastal regions, the Sierra Nevada foothills, and much of the Central Valley have a Mediterranean climate , with warmer, drier weather in summer and cooler, wetter weather in winter.
California has two high deserts: the Mojave Desert and the Great Basin Desert. The Mojave Desert ecoregion is marked by the presence of Joshua trees. [3] The dry cold Great Basin desert of California consists of the Owens Valley, and is classified into Great Basin shrub steppe by the WWF, [4] and into the Central Basin and Range ecoregion by ...
All three oak species which characterize California oak woodlands can be defined as "long-lived, slow-growing trees." [6] The frequent fires seen within the region have resulted in species such as coastal live oak and Englemann oak (which grow in drier, more fire prone regions) to have developed a resistance to low-intensity fires.
A Joshua tree in Juniper Hills is engulfed by the Bobcat fire in 2020. Wildfires, along with climate change and habitat loss, are taking an increasing toll on Joshua trees in California.
The vegetation in the Mediterranean California ecoregion is a mixture of grasses and shrubs called chaparral with some oak forests as well. This area is very highly populated and agriculture is prevalent in the valleys. [1] Evergreen trees and shrubs—such as heaths—mainly dominate Mediterranean vegetation with a shrubby to herbaceous ...
Pinus muricata forest growing at Point Reyes, California Closed-cone conifer forests are found in small, scattered patches throughout the ecoregion, typically adjacent to maritime chaparral. Common pines are lodgepole pine ( Pinus contorta ), bishop pine ( Pinus muricata ), Monterey pine ( Pinus radiata ), and knobcone pine ( Pinus attenuata ).