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Invasive Species Reintroduce Toxic Chemicals to Green Bay Food Web
Between 1954 and 1971, polychlorinated biphenyls, also known as PCBs, were discharged into the Lower Fox River in northeastern Wisconsin by manufacturers of carbonless copy paper, said Beth Olson, water program director for the Wisconsin Department of Natural Resources’ East District.

The river flows north from Lake Winnebago and discharges into Lake Michigan’s Green Bay.

PCBs are potentially cancer-causing and may harm reproductive, neurological and immune systems, according to the Environmental Protection Agency. The chemical was federally banned in 1979.

Although the contaminants have been buried in the sediments, two invasive species – the quagga mussel and round goby – can allow a group of toxic chemicals deposited more than 45 years ago to reenter the food web, passing them to predatory fish and possibly people.


 
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Weed Harvesters Remove 3,707 Tons of Weeds - Around 3,707 tonnes of weeds have been cleared from the 910-acre Bellandur lake. In the past five days alone 737 tonnes have been removed by just two machines, according to an official release issued by the Bangalore Development Authority.


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