The tundra
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The Tundra PowerPoint PPT Presentation


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The Tundra. Angela Duncan. Geography. Located above the Arctic Circle Stretches from northern Scandinavia, across Russia, Siberia, Northern Alaska, and finally to Canada. Hugs the northern most ring of the planet. Climate. Generally cold and very dry Short summers 6 to 10 weeks long

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The Tundra

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The tundra

The Tundra

Angela Duncan


Geography

Geography

  • Located above the Arctic Circle

  • Stretches from northern Scandinavia, across Russia, Siberia, Northern Alaska, and finally to Canada.

  • Hugs the northern most ring of the planet


Climate

Climate

  • Generally cold and very dry

  • Short summers

    • 6 to 10 weeks long

  • Never gets warmer than 50°F

  • Cold winds continuously blow across the landscape

  • Average temperature is around -30°F


Soils

Soils

  • Topsoil composed mostly of humus due to slow decomposition rates

  • Layer of permafrost underneath

  • Constant freezing and thawing of the soil brings rocks to the surface

    • Polygonal pattern of stones on the surface


Biology

Biology

  • Vegetation: Lichens, Mosses, Grasses, Herbaceous Plants, Small Shrubs

  • Land Animals: Grizzly Bears, Gray Wolves, Caribou, Oxen, Weasels, Lemmings, Arctic and Red Foxes, Moose

  • Sea Animals: Walruses, Orcas, Beluga Whales, Sea Lions

  • Birds: Snowy Owls, Golden Eagles, Bald Eagles, Arctic Geese, Puffins, Arctic Loons


Human influence

Human Influence

  • Used to be the only biomes untainted by humankind

  • Drilling for Oil

  • Pesticides from nearby civilization

  • Chernobyl Disaster

    • 1986 Ukraine

    • Great explosion of the power plant

    • Massive amounts of radiation released (cesium-137)

    • Covered the Norwegian tundra in the form of rainfall

    • Damage to the food chain


The tundra1

The Tundra


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