References

[ Excerpt from oneearth.org ]

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)