Abstract
The grasslands of North America can be divided into several major biogeographic regions, including the tallgrass, mixed-grass, and shortgrass prairies of the Great Plains; the desert grasslands of the southwestern United States and Mexico; the California grasslands; the Palouse prairie in the Intermountain Region (that is, the area between the Rocky Mountains and the Cascade and Sierra mountain ranges) of northwestern United States and British Columbia; the fescue prairie of northern Montana, southern Alberta, and central Saskatchewan; and the coastal grasslands of the Gulf Coast (Sims and Risser, 2000).