Bioregions
One Earth utilizes these 14 realm divisions – further divided into 52 subrealms, 185 bioregions, and 844 ecoregions – as a framework to better understand the natural world that surrounds us.
Adriatic Sea & Central Mediterranean Mixed Forests (PA19)
Aegean Sea & East Mediterranean Mixed Forests (PA18)
Afghan-Balochistan Drylands, Mountain Meadows & Conifer Forests (PA30)
Alps & Po Basin Mixed Forests (PA13)
Altai Mountain Forests, Grasslands & Desert Steppe (PA37)
Amsterdam-Saint Paul Islands (AT3)
Andean Mountain Forests & Valleys (NT11)
Andean Mountain Grasslands (NT5)
Antarctic Peninsula & Scotia Sea (AN2)
Appalachia & Allegheny Interior Forests (NA24)
Arakan Mountains & Northern Triangle Forests (IM10)
Baja California & Southern Deserts (NA30)
Balearic Sea & West Mediterranean Mixed Forests (PA20)
Baltic Sea & Sarmatic Mixed Forests (PA11)
Black Sea, Caucasus-Anatolian Mixed Forests & Steppe (PA17)