U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications

NOAA-NMFS-NWFSC TM-35: Chinook Status Review

Figure 3. U.S. Environmental Protection Agency ecoregions for Californai, Idaho, Oregon and Washington (Omernik and Gallant 1986, Omernik 1987). Regions are based on land use, climate, topography, potential natural vegetation, and soils. Ecoregions with number desginations are described in the text.


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