Assessment of the invasive species legislation for the Great Lakes
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document in English
ecology & environment
presentation
published 30/06/2008
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level : Advanced
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Summary
In 1959, the Great Lakes opened to deep draft navigation, and since then these waters have transported an estimated two billion tonnes of cargo from the United States to Canada (Seaway 2008). The lakes have 47 deep draft ports and 55 shallow draft harbors, because “waterborne commerce is more economical and environmentally sound form of transportation and is made possible by partnerships with government agencies and industry in both the United States and Canada” (U.S. Army 2008). Although it has maintained a “near-perfect record of trouble-free navigation” for over 40 years, the quality of this navigation has not been so perfect (Seaway 2008). One hundred and eighty invasive species such as the sea lamprey and zebra mussel have negatively impacted the Great Lakes on both an environmental and economical level (National 2007).
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