BetaBetaDataset
To identify a set of the Earth's terrestrial, freshwater and marine ecoregions that harbor exceptional biodiversity.
The process yielded 238 ecoregions--the Global 200--comprised of 142 terrestrial, 53 freshwater and 43 marine priority ecoregions.
The features studied comprised of species richness, endemic species, unusual higher taxa, unusual ecological occurence or evolutionary phenomena and the global rarity of habitats.
Satellites imagery.