Biogeographic Regions of Arizona
Arizona’s environment is exceptionally diverse. From arid lowlands
dominated by cacti and scattered shrubs to cool mountain forests
of spruce and fir, the state contains many of the major plant
communities found in western North America. Local climate,
geology, flora, and fauna vary considerably depending on one’s
location. The state can be divided into five biogeographic
regions based on these differences. To the north are the Mojave
Desert and Colorado Plateau regions, stretching across the central
part of the state is the Central Highlands region,
and spanning southern Arizona are the
Sonoran Desert and Sky Island regions. Though each of these
areas is distinct, some plant communities and their associated
wildlife as well as some geologic features may be common to
several regions of the state.
In each of these regions one can find a collection of different
biotic communities. These communities
have varied plant and animal life adding diversity and interest to
the landscape.
