Introduction
California is known as being one of the most biologically diverse regions not only in this country, but also in the world (Defenders, 2006). Within its 160,000 square miles, California's varied habitat harbors more unique species of plants and animals than any other state. The diversity of climates and landscapes, and all the barriers to migrations such as rivers, mountains, and deserts, has led over thousands of years to the evolution of a large number of isolated species and var...
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