The word 'tundra' refers to an environment in very cold climates; it's not used for any other kind of ecosystem. Despite the harsh climate, several species thrive in the tundra.
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No Trees
A key feature of tundra ecosystems is that they lack trees due to the permafrost. A distinguishing trait of the tundra is its flat, treeless panorama.
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Biome Terminology
'Tundra' is also used more broadly to describe one of Earth's biomes in geography and ecology. Students learn about the tundra as one of the major biomes.