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Researchers look into Lake Superior algae bloom

Researchers are investigating a major algal bloom that surfaced last week, early August 2018,...
Researchers are investigating a major algal bloom that surfaced last week, early August 2018, in Lake Superior between Duluth and the Apostle Islands. Courtesy of Brenda Moraska Lafrancois. (WLUC)
Published: Aug. 15, 2018 at 2:41 PM EDT
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Scientists are investigating an unprecedented algae bloom in Lake Superior and have sent samples for lab testing to determine if it's toxic.

Minnesota Public Radio reports that kayakers and other visitors to the popular lakeshore along eastern Minnesota and northwestern Wisconsin found green scummy algae last week on Lake Superior's surface.

Robert Sterner directs the Large Lakes Observatory at the University of Minnesota Duluth. He says the bloom has largely dissipated but reports suggest it stretched 50 miles (80.5 kilometers) along the shoreline from near Superior, Wisconsin, to the Apostle Islands.

Blue-green algae blooms have become more commonplace in Midwestern lakes and rivers. Scientists say the increase is partly because of warming water temperatures.

Researchers expect to know by the end of the week whether the bloom was toxic.

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Information from: Minnesota Public Radio News,

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