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What is a bioregion? A bioregion is a geographical area defined not by political boundaries but by ecological systems. It is smaller in scale than a biogeographical realm, but larger than an ecoregion or an ecosystem. On land, the most widely held bioregional framework is the biome or “ecozone” — a large community of plants and animals adapted to a specific climate found over a range of continents. There are 14 widely held biome types, mapped below with an overlay of the 185 bioregions

  • Deserts & Xeric Shrublands (rust)
  • Mountain Grasslands & Shrublands (beige)
  • Temperate Grasslands, Savannas & Shrublands (yellow)
  • Tropical & Subtropical Grasslands, Savannas & Shrublands (orange)
  • Flooded Grasslands & Savannas (light blue)
  • Mangroves (pink)
  • Mediterranean Forests, Woodlands & Scrub (red)
  • Temperate Broadleaf & Mixed Forests (dark green)
  • Temperate Conifer Forests (grey-green)
  • Tropical & Subtropical Coniferous Forests (light green)
  • Tropical & Subtropical Dry Broadleaf Forests (olive green)
  • Tropical & Subtropical Moist Broadleaf Forests (bright green)
  • Boreal Forests/Taiga (medium blue)
  • Tundra (teal)
Credit: Karl Burkart, One Earth