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Western Mojave Basins

Ecoregion in Great Basin, CA

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The Western Mojave Basins ecoregion includes the alluvial plains, fans, and bajadas of the major valleys lying between the scattered mountain ranges of Ecoregion 14k. There is some variation in climate and vegetation from north to south, but the basins typically are dominated by creosotebush and white bursage, with areas of shadscale, fourwing saltbush, and on some upper bajadas and fans, scattered Joshua trees. The Western Mojave Basins ecoregion has little summer rainfall compared to the Eastern Mojave Basins (14a), and typically lacks species such as Mojave yucca and big galleta found more to the east. Some annual plant species associated more with Mediterranean climates occur here, but not in the Eastern Mojave Basins. Soil temperature regimes are thermic and soil moisture regimes are aridic. Drainage is internal to closed basins in the Mojave.

— EPA

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Western Mojave Basins

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