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Invasive Aquatic Weed, Starry Stonewort, Creeps Across US
An aquatic weed is creeping across the Great Lakes region that grows really fast and is very hard to kill.

Scientists don’t know a lot yet about starry stonewort, but they’re hurrying to find out more. The plant, which forms dense surface mats in lakes, first turned up in North America in 1978 in the St. Lawrence River in New York state. Researchers think it probably arrived in ballast water from ships entering the Great Lakes.

It wasn’t a big concern for about 30 years, but then it took off. Now it’s widespread on Michigan’s Lower Peninsula, where it has infested more than 200 inland lakes, and parts of western New York. It was found in Wisconsin in 2014 and in Minnesota in 2015. It has also reached some lakes in Indiana, Pennsylvania, Vermont and Canada.


 
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Ecology Shapes Evolution and Evolution can Shape Ecology - Some 300 to 500 years ago the damming of the Connecticut streams stranded some alewife herring in inland lakes which resulted in changes of the alewife and well as critters that feed on them such as water fleas.


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