Ecoregions of the world, spanning all land area (terrestrial) of the planet, were first defined and mapped in 2001[1] and subsequently revised in 2017.
These ecoregions fall within two biogeographic realms: Indomalayan and Palearctic.
They also fall under ten biomes: Deserts and Xeric Shrublands, Flooded Grasslands and Savannas, Mangroves, Montane Grasslands and Shrublands, Temperate Broadleaf and Mixed Forests, Temperate Conifer Forests, Tropical and Subtropical Coniferous Forests, Tropical and Subtropical Dry Broadleaf Forests, Tropical and Subtropical Grasslands, Savannas and Shrublands, and Tropical and Subtropical Moist Broadleaf Forests.
The ecoregion Rock and Ice is not included under any specific biome or biogeographic realm.
[4] India's seas are in the Western Indo-Pacific marine realm.