NOTE: This layer version only contains "sections" from the original GIS layer described elsewhere in this metadata document. The sections were "dissolved" by the California Department of Fish and Wildlife from the original GIS layer EcoregionsCalifornia07_3. This version has had several additional modifications for CDFW Areas of Conservation Emphasis (ACE) usage, including being conformed to Cnty19_1 counties layer linework, the Great Valley section split in two (North and South), had all bays "erased", and offshore rocks/stacks detail removed.This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993) "... mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities."These divisions were first created by Bailey in 1976 and have been updated since. This dataset is the 2007 (Goudey) version.This version of the ecoregion subsections was used by the California Department of Fish and Wildlife for their Areas of Conservation Emphasis work and their Wildlife Action Plan (http://www.dfg.ca.gov/biogeodata/ace/ & https://www.wildlife.ca.gov/SWAP/Final).Complete metadata can be found here: http://www.fs.usda.gov/detail/r5/landmanagement/gis/?cid=fsbdev3_048133. The original data can be downloaded in full here: http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5351343.zip.