• La source externe de substances chimiques toxiques transportées par voie atmosphérique dans Les Grands Lacs a été documentée.
• The Great Lakes Binational Strategy was signed in1997, committing Canada and the U.S. to interim targets and schedules towards eliminating persistent, bioaccumulative toxic substances and to an assessment of atmospheric deposition to the Great Lakes Basin.Giga-fren Giga-fren
L'invasion On pense que le Cormoran à aigrettes n'a pas toujours niché dans les Grands Lacs.
Colonization of the Great Lakes: 1920s - 1950s The Invasion Historically, it is thought that the Double-crested Cormorant did not nest in the Great Lakes.Giga-fren Giga-fren