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This mapping documents the changes in extent and condition of vernal pool habitat in the Great Valley between 2005 and 2012. "Vernal pool habitat" is defined as vernal pools and the surrounding upland (typically grassland) habitat matrix. The 2005 basemap was created by using double-blind mapping protocol and included 21.4 million acres in and surrounding the Sacramento and San Joaquin valleys (Witham et al 2013). The area included in the 2012 remapping effort focused on the 807,820 acres identified in the 2005 map and areas immediately surrounding the previously mapped polygons. Special attention was paid to areas where habitat was being created through mitigation banking. The result of the 2012 remapping shows...
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This data layer depicts approved acquisition boundaries for the National Wildlife Refuge System, as administered by the U.S. Fish and Wildlife Service (USFWS) in the Pacific Southwest Region. The primary source for this information is the USFWS Realty program.


    map background search result map search result map National Wildlife Refuge, Approved Acquisition Boundaries, Pacific Southwest Region Vernal Pools in California, 2012 Vernal Pools in California, 2012 National Wildlife Refuge, Approved Acquisition Boundaries, Pacific Southwest Region