Topic - Carl Watras

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In this March 12, 2019 photo, Carl Watras poses in a survival suit jacket near Rock Lake in Vilas County, Wisc. Carl Watras, an limnologist for the University of Wisconsin-Madison's Center for Limnology, and the state Department of Natural Resources has been measuring mercury levels in Little Rock Lake in Vilas County, Wis., for 32 years. Watras found that mercury levels in the lake rise and fall with the water levels, which fluctuate due to climate change. (Sarah Whites-Koditschek/Wisconsin Center for Investigative Journalism via AP)

As lake levels rise, so do mercury levels in Wisconsin fish

By SARAH WHITES-KODITSCHEK of Wisconsin Center for Investigative Journalism. - Associated Press

FILE - In this July, 17, 1999, file photo, a freighter is silhouetted on Lake Superior near Whitefish Point, Mich. Two newly completed scientific papers are providing fresh information about how complex interactions of evaporation, precipitation and winter ice cover affect water levels on the Great Lakes, and regional industries such as shipping and tourism. (AP Photo/Carlos Osorio, File)

Reports shed light on Great Lakes water levels

By JOHN FLESHER - Associated Press