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Purple Loosestrife has taken over our meadows and wetlands across Canada; the Round Goby is proliferating in Lake Superior and Michigan; the Spiny Clado-ceran has invaded Lakes Ontario; and all around the Great Lakes and as far south as the Mississippi River, the Zebra Mussel is infesting our waters.
The problem of aggressive plants, fish and other aquatic life being transported across the world and becoming nuisances where they settle is becoming worse as the years go by. Experts gathered in Toronto in February to look at the problem, and heard that in the Great Lakes alone we have seen one major invader every three years for the last 15 years.
The 10th International Aquatic Nuisance Species and Zebra Mussels Conference was a week-long...