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Lake Ontario Shoreline Algae Action Advisory Committee

Did you know?

Phosphorus Fertilizers

The overuse of phosphorus fertilizers is causing toxic algae to bloom in the Great Lakes, inland lakes and streams.  

It is estimated that a single pound of phosphorus can stimulate the growth of up to 500 pounds of algae.

When the algae growth blankets the water's surface, sunlight and oxygen are blocked, disrupting the natural life cycles of marine life.  

What can I do?

Use phosphorus-free fertilizer unless:

  • You have a newly seeded lawn.
  • Soil tests show a phosphorus deficiency.


More Information...

LOSAAAC was a volunteer group of residents who worked with Regional and Local Councillors, municipal staff and experts, between 2002 and 2008, identifying causes and solutions of nuisance algae on the Lake Ontario shoreline of Halton.

The committee wrote their final report in January 2008 and presented it to Regional Council. In May 2008, Council approved an implementation plan based on LOSAAAC's recommendations.

For more information on LOSAAAC's recommendations and the implementation plan read the final reports.

Lake Ontario Algae Research

Ontario Water Works Research Consortium (2007)

Halton Region is a funding partner in the Attached Algae Research Project of the Ontario Water Works Research Consortium. This consortium includes research teams at the National Water Research Institute and the University of Waterloo.

  • 2007 Summary Final Report for Ontario Water Works Research Consortium
    • Final Report Adobe Portable Document Format (PDF) 3.7MB
    • Appendix 1  Adobe Portable Document Format (PDF) 99KB - An Ecological Review of Cladophora in the Laurentian Great Lakes by Higgins et al.
    • Appendix 2  Adobe Portable Document Format (PDF) 1.6MB - Fine scale variation of Cladophora sp. biomass using a novel hydro-acoustic mapping method by Depew and Hecky
    • Appendix 3  Adobe Portable Document Format (PDF) 357KB - Organic Tissue Stoichiometry of Cladophora glomerata along the Great Lakes Halton Shoreline by Houben et al.
    • Appendix 4  Adobe Portable Document Format (PDF) 44KB - Molecular Genetic Analysis of Freshwater species of Cladophora from North America by Ross and Muller
    • Appendix 5  Adobe Portable Document Format (PDF) 130KB - Modeling the Growth of Cladophora in the Laurentian Great Lakes in Response to Changes Due to the Exotic Invader Dreissena and to Lake Warming by Malkin et al.
    • Appendix 6  Adobe Portable Document Format (PDF) 1.7MB - Phosphorus uptake and release of Cladophora in Lake Ontario by Malkin and Hecky
    • Appendix 7  Adobe Portable Document Format (PDF) 66KB - Dreissenid Biomass and Bioavailable Phosphorus Recycling Along the Oakville Shore of Lake Ontario by Ozersky et al.
    • Appendix 8  Adobe Portable Document Format (PDF) 4.9MB - Assessing the Influence of Spatial Heterogeneity of Environmental Parameters on Cladophora growth dynamics in Lake Ontario by Higgins
    • Appendix 9  Adobe Portable Document Format (PDF) 316KB - Use of pulse amplitude modulated fluorescence to assess light versus nutrient limitation in Cladophora glomerata from Lake Ontario by Hiriart-Baer et al.
    • Appendix 10  Adobe Portable Document Format (PDF) 68KB - Cladophora resurgent and revisited: A brief literature review by Hiriart-Baer et al.
    • Appendix 11  Adobe Portable Document Format (PDF) 237KB - Annual Reports 2003 to 2005

Conservation Halton/LOSAAAC Water Quality Study (2005)

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Committee Annual Reports

Final Reports

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