WWF Ecoregions - Major Habitat Types (Biomes) Legend

An ecoregion is defined as a large area of land or water that contains a geographically distinct assemblage of natural communities that
(a) share a large majority of their species and ecological dynamics;
(b) share similar environmental conditions, and;
(c) interact ecologically in ways that are critical for their long-term persiste.

BIOME (Formally known as Major Habitat Types or MHTs) - Broad kinds of ecoregions that:
a) Experience comparable climatic regimes;
b) Have similar vegetation structure;
c) Display similar spatial patterns of biodiversity; and
d) Contain flora and fauna with similar guild structures and life histories.
e) Similar minimum requirements and thresholds for maintaining certain biodiversity features.
f) Have similar sensitivities to human disturbance.