Death Valley ecoregion

The Death Valley Ecoregion is a terrestrial ecoregion of the Deserts and xeric shrublands biome, as designated by the World Wildlife Fund (WWF) arid ecoregions scheme. Other biogeography systems define and designate the Mojave Desert ecoregion differently.
Death Valley Ecoregion
The Death Valley Ecoregion is located in the Mojave Desert, in the southwest corner of the physiographic Great Basin Region, in the Southwestern United States. In addition to the areas in California and Nevada, it includes the Mojave Desert's areas reaching into northwestern Arizona and southwestern Utah.
The California Department of Fish and Wildlife (CDW) also designates the desert's area within the state as the Mojave Desert Ecoregion, for their State Wildlife Action Plan (SWAP) programs.
Mojave Basin and Range Ecoregion
The United States Environmental Protection Agency (EPA), United States Geological Survey (USGS), the Bureau of Land Management (BLM) all designate the Mojave Desert as the Mojave Basin and Range ecoregion, of the Deserts and xeric shrublands biome. The Mojave Desert is located within the physiographic Basin and Range Province. They all include all the desert's range, in California, Nevada, Arizona, and Utah.
 
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