Ecoregions: References
Ecosystems: More Reading
Abell et al. 2008. BioScience 58:403-414.
Bailey, R. 1995. Description of the Ecoregions of the United States. USDA Forest Service. Misc. Publication # 1391.
Bailey, R. 1996. Ecosystem Geography. Springer-Verlag, New York, NY, 204 pp., illus., folded maps.
Bailey, R. 1998. Ecoregions Map of North America: Explanatory Note. USDA Forest Service, Misc. Publication no. 1548. 10 pp. + map scale 1:15,000,000.
Bailey, R. Ecoregions: the Ecosystem Geography of the Oceans and Continents. 1998. Springer-Verlag New York Inc., New York. 176 pp.
Cleland, D.T.; Freeouf, J. A., Keys, J.E.; Nowacki, G.J.; Carpenter, C.A.; and McNab, W.H. 2005. Ecological Subregions: Sections and Subsections for the conterminous United States. (A.M. Sloan, technical editor) Washington, DC: U.S. Department of Agriculture, Forest Service, presentation scale 1:3,500,000; colored. Also available on CD-ROM consisting of GIS coverage in ArcINFO format.
Omernik, J.M. 1987. Ecoregions of the conterminous United States. Map (scale 1:7,500,000). Annals of the Association of American Geographers 77(1):118-125.
Omernik, J. M., and R. G. Bailey. 1997. Distinguishing between watersheds and ecoregions. J. Amer. Water Resources Assoc. 33:935-949.
Omernik, J. M. 2004. Perspectives on the nature and definition of ecological regions. Environmental Management, Springer-Verlag New York, Inc.
U.S. Environmental Protection Agency. 2001. Draft Level III and IV Ecoregions of EPA Region 4. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Western Ecology Division, Corvallis, OR. Scale 1:2,000,000