The Cumulative Effects of Climate Warming and Other Human Stresses on Canadian Freshwaters in the New Millennium

  • D. W. Schindler


Climate warming will adversely affect Canadian water quality and water quantity. The magnitude and timing of river flows and lake levels and water renewal times will change. In many regions, wetlands will disappear and water tables will decline. Habitats for cold stenothermic organisms will be reduced in small lakes. Warmer temperatures will affect fish migrations in some regions. Climate will interact with Overexploitation, dams and diversions, habitat destruction, non-native species, and pollution to destroy native freshwater fisheries. Acute water problems in the United States and other parts of the world will threaten Canadian water security. Aquatic communities will be restructured as the result of changes to competition, changing life cycles of many organisms, and the invasions of many non-native species. Decreased water renewal will increase eutrophication and enhance many biogeochemical processes. In poorly buffered lakes and streams, climate warming will exacerbate the effects of acid precipitation. Decreases in dissolved organic carbon caused by climate warming and acidification will cause increased penetration of ultraviolet radiation in freshwaters. Increasing industrial agriculture and human populations will require more sophisticated and costly water and sewage treatment.


Great Lake Zebra Mussel Ballast Water Lake Trout North American Free Trade Agreement 
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© Springer Science+Business Media New York 2001

Authors and Affiliations

  • D. W. Schindler
    • 1
  1. 1.Department of Biological SciencesUniversity of AlbertaEdmontonCanada

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