Grand Rounds, vol. 2., no 52 has been posted at Tundra Medicine Dreams.
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The tundra is is a special habitat where tree growth is inhibited by low temperatures and a short growing season. In the Arctic, the tundra is dominated by permafrost, a layer of permanently frozen subsoil, so the only vegetation that grows under such conditions are grasses, mosses and lichens.
Warming Climate May Cause Arctic Tundra To Burn:
The frozen tundra that covers a majority of Russia and northern Asia is a hard place to live. The average winter temperature is 30 below zero, and winter seems to last a lifetime. The short summer, which still gets only glancing rays of sun, barely breaks above freezing.