A type of ecosystem dominated by lichens, mosses, grasses, and woody plants.
Tundra is found at high latitudes (arctic tundra) and high altitudes (alpine
Arctic tundra is underlain by permafrost and is usually [water] saturated.
Tundra landscape in North America
To read about this term in context:
GreenFacts Summary on Arctic Climate Change
4.1 How will vegetation zones shift?