BIOL 1070 Chapter Notes -Fetus, Transitional Fossil, Extinction Event
4 Apr 2014
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Document Summary
Carbon dioxide in the air in uences the overall mean temperature of the planet; increased levels contribute to the warming temperature of the earth. The arctic is of special concern as it is warming at a much higher rate than most parts of the world. Sheila watt-cloutier (lawyer and canadian inuit activist) Poisoning in food sources in the arctic, due to toxins from elsewhere. Contaminated drinking water, erosion, melting permafrost, unpredictable sea ice conditions, melting glaciers leads to torrent rivers instead of streams. Marine species that rely on the sea ice, such as polar bears, will decline, some facing extinction. Warming is likely to disrupt or destroy hunting culture of inuit people. 19 subpopulations of polar bears; only one across the world is thought to be increasing, 3 stable, 8 declining, and 7 are data de cient. Those declining are due to amount of sea ice, which is essential for their survival and reproduction.
