Landscape Diversity: Refers to the microhabitats and climatic gradients available in the immediate neighborhood surrounding any 30-m cell of land. The persistence of species in an area increases in landscapes with a wide variety of microclimates created by the topography (topo-climates), elevation and hydrology. In this study, we measure microclimates by counting the variety of small-scale landforms, measuring elevation range, and evaluating the density and configuration of wetlands in a 100-acre neighborhood around every point on the landscape. Read the methods for your region: Eastern US, Great Lakes and Tallgrass Prairie, Great Plains, Lower Mississippi and Ozarks, Rocky Mountains and Desert Southwest, Pacific Northwest, California