A large area whose boundaries are fixed by geography, topography, climate, vegetation, and other easily recognized natural features of the landscape. Ecoregions contain many landscapes with different spatial patterns of ecosystems
Regional Vulnerability Assessment (ReVA) Program (Terms Are Helpful For Understanding the Activities of ReVA), Glossary, Vasu Kilaru, USEPA-Research Triangle Park, NC, USA 2011. http://www.epa.gov/reva/glossary.html, (Vulnr Assess - Amer) {84}