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Contact: Mark C. Urban
University of Connecticut

Mark C. Urban, University of Connecticut

Caption: University of Connecticut Assistant Professor Mark Urban stands under a sheet of aufeis in Alaska. These ice sheets form over Arctic underground springs but have become less prevalent with global warming. Urban, a professor of ecology and evolutionary biology, fears that current climate change models may grossly underestimate future extinctions because they fail to account for species competition and movement.

Credit: Mark Urban

Usage Restrictions: Image and caption information cannot be used until 7 p.m. (EST) Jan. 3, 2012 due to embargo.

Related news release: Climate change models may underestimate extinctions

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