Biomes are worldwide groups of similar ecosystems that can be defined by their major vegetation type. For example, the Sonoran desert ecosystem we live in Phoenix is defined by geography, climate and vegetation as distinct from other three desert ecosystems (Mohave, Great Basin and Chihuahuan) in North America. These distinct desert ecosystems along with desert ecosystems on other continents (for example the Sahara in Africa, Patagonia in South America and Gobi in Asia) make up the desert biome.

Biomes are described based on plant types and abiotic environmental factors common all of the combined ecosystems. The number of distinct biomes can vary according to different authorities. The most common groupings of terrestrial biomes used North America include tundra, boreal forest (taiga), grasslands, deserts, tropical rainforests, and mountain forests. Use the interactive map below to learn more about vegetation and abiotic characteristics of each of these biome.