Bioregions

The Bioregions 2023 framework categorizes the Earth into major biogeographical realms, the broadest divisions based on ecosystems and organism groupings with shared evolutionary histories. These realms approximate the major continents but include further subdivisions into 14 realms, 52 subrealms, 185 bioregions, and 844 ecoregions, as utilized by One Earth to enhance our understanding of the natural world. Bioregions, defined ecologically rather than politically, bridge the scale between expansive biogeographical realms and smaller ecoregions or ecosystems. The most recognized land-based bioregional framework is the 'biome' or 'ecozone,' which groups broad communities of flora and fauna adapted to specific climatic conditions across continents.

COPYRIGHT/CREDIT: One Earth / Wikipedia