Under the Lens: Blue-Green Algae
A bacteria called cyanobacteria, blue-green algae is almost always present in Wisconsin lakes, but its quantity is kept in check by other aquatic organisms such as zooplankton and a limited amount of nutrients essential for growth, like phosphorous and nitrogen. However, when there are excess nutrients, an abundance of sunlight and calm water, the conditions become right for cyanobacteria to grow exponentially. Discharge from water treatment and food-processing plants, fertilizer runoff from fields, and leaching from animal waste are some of the biggest contributors of excess nutrients in Wisconsin lakes.