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)

Amazon River Estuary (NT16)

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)

Azores Forest Islands (PA21)

Baja California & Southern Deserts (NA30)

Balearic Sea & West Mediterranean Mixed Forests (PA20)

Baltic Sea & Sarmatic Mixed Forests (PA11)

Bermuda (NA26)

Black Sea, Caucasus-Anatolian Mixed Forests & Steppe (PA17)

Borneo Tropical Forests & Sundaland Heath Forests (IM16)

Brazilian Atlantic Dry Forests (NT15)