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"Ecological Succession." Science Daily. N.p., 11 Mar. 2013. Web. 18 Apr. 2014.
"Global Warming Impacts the Arctic and Antarctic." WWF Global. N.p., 21 July 2013. Web. 24 Apr. 2014.
"Human Impacts in Antarctica." Australian Government. N.p., 3 Apr. 2012. Web. 21 Apr. 2014.