Mike Schoonveld: Are intra-lake ballast regulators needed to control invasive species in Great Lakes?

There have been invasive species in the Great Lakes for more than a century.
Early on, few people were concerned with invasives and the efforts to curtail the early arrivals or prevent additional ones from becoming established. Fingers pointed to man-made canals when sea lampreys and alewives got into the “upper” lakes – the Great Lakes above Niagara Falls, specifically, the Erie Canal that connected the upper lakes to the Hudson River which flowed freely into the Atlantic at New York, and the Welland Canal connecting Lake Erie and Lake Ontario, bypassing Niagara Falls.

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