Native Village 
Youth and Education News

January 1, 2013

Map shows threats, stress on Great Lakes
http://www.upi.com/
Condensed by Native Village


Great Lakes stress map, from lowest (blue) to highest (red.)

Michigan: The Great Lakes contains 20% of the world's fresh water. Now a startling new map shows environmental threats to their ecosystems caused by humans

Researchers at the University of Michigan and other institutions have created the most comprehensive map to date of Great Lakes' stressors. It's the first to account for all major types of stresses on the lakes in a quantitative way.

"Despite clear societal dependence on the Great Lakes, their condition continues to be degraded by numerous environmental stressors," said David Allan, aquatic sciences professor.

U.S. and Canadian scientists analyzed the latest data from federal and state agencies, non-governmental organizations and individual researchers.

Among the 34 stressors examined were
coastal development, pollutants transported by rivers from agricultural and urban land, fishing pressure, climate change, invasive species and toxic chemicals.

"Current efforts to conserve, manage and restore the Great Lakes often take a piecemeal approach, targeting threats one by one," Allan said. "We need to recognize that the Great Lakes are affected by multiple environmental stressors, and devise strategies based on a full reckoning."


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