Biomes
Biomes
Department of Geosciences
University of Arizona
TERRESTRIAL BIOMES: major (global scale) regions of physically similar, but not taxonomically related, vegetation and animals (life zones, ecoregions)
Each biome type has a distinctive form of vegetation (physiognomy)
A. TUNDRA: treeless low (less than 1 m) vegetation with short perennials, water frozen. Typical plants include sedges, lichens, mosses, grasses, and dwarf woody plants. Typical animals include snowy owls, musk ox, reindeer, polar bears, and migrant birds. Very cold, often dry climate, but whith permanently frozen ground creating saturated soils during summer months. Freeze-thaw cycles fell trees.
- Arctic Tundra is circumpolar (scanty Antarctic).
- Alpine Tundra at high elevation.
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