Ecoregions of the Conterminous United States: Evolution of a Hierarchical Spatial Framework

@article{Omernik2014EcoregionsOT,
  title={Ecoregions of the Conterminous United States: Evolution of a Hierarchical Spatial Framework},
  author={James M. Omernik and Glenn E Griffith},
  journal={Environmental Management},
  year={2014},
  volume={54},
  pages={1249-1266}
}
AbstractA map of ecological regions of the conterminous United States, first published in 1987, has been greatly refined and expanded into a hierarchical spatial framework in response to user needs, particularly by state resource management agencies. In collaboration with scientists and resource managers from numerous agencies and institutions in the United States, Mexico, and Canada, the framework has been expanded to cover North America, and the original ecoregions (now termed Level III) have… CONTINUE READING

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