WWF’s Global 200 project analyzed global patterns of biodiversity to identify a set of the Earth's terrestrial, freshwater, and marine ecoregions that harbor exceptional biodiversity and are representative of its ecosystems. This process yielded 238 ecoregions--the Global 200--comprised of 142 terrestrial, 53 freshwater, and 43 marine priority ecoregions. Effective conservation in these ecoregions would help conserve the most outstanding and representative habitats for biodiversity on this planet.

The Global 200 priority ecoregions are a system developed for assessing global conservation priorities.

Shapefile and Metadata Online: http://www.worldwildlife.org/publications/global-200