© Pete Saloutos/Panoramic Images (Washington Title Image Large)
Natural Geography of Washington
The distribution patterns of species and ecosystems are the result of natural features of the landscape. Geology, soils, topography, hydrology, and climatic factors combine to create suitable niches for species and ecosystems to occupy. Understanding these natural boundaries is useful as we assess conservation needs and as we plan conservation actions. Two of the most frequently used natural boundary concepts are ecoregions and watersheds. Information on each is presented below.