The effect of different nitrogenous compounds on cyanobacteria physiology and toxin production


Intensive agricultural lands feed into Canada’s Great Lakes. The primary type of nitrogen used in agriculture has changed over time, shifting from organic to inorganic forms, such as urea. This change has corresponded with an increase in the frequency, magnitude, and duration of phytoplankton blooms, including cyanobacteria that are known to produce toxins harmful to life. Because urea is important to global food security, it is critical to understand its effects on receiving freshwaters.
In this study, researchers will investigate the effect of various nitrogenous compounds — nitrate, ammonium, or urea — on cyanobacteria growth. They will use a series of laboratory- and field-based studies to uncover how urea affects cyanobacteria physiology and toxin production. Laboratory-based experiments will focus on testing which forms of nitrogen cyanobacteria and eukaryotic phytoplankton prefer. Field-based studies will test the potential of urea to promote cyanobacteria growth and toxin production.
For more information, please contact Dr. Irena Creed ([email protected])

Lake Erie (ESA, 2013)

Other RAEON Projects


Inland Lakes

Lake Erie

Huron-Erie Corridor

St. Lawrence River

Lake Superior

Lake Ontario

Lake Huron

Lake Michigan

Projects to Come

Rideau Canal Waterway

Lake Winnipeg

Get In Touch

    Great Lakes Institute for Environmental Research
    University of Windsor
    2990 Riverside Drive West
    Windsor, Ontario, N9C 1A2