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HABs can cause illness and death in humans, pets, and wildlife. Symptoms include:
Nutrients, such as nitrogen and phosphorus, can contribute to blooms. Sources of nutrients include agricultural activities, application of lawn fertilizers, wastewater treatment facilities, septic tanks, sewer overflows, and runoff. Warm surface water temperatures can also contribute to blooms.
Yes. The Great Lakes have a history of HABs, particularly in warm, shallow areas such as Saginaw Bay and western Lake Erie. Scientists have attributed this latest resurgence of HABs to the invasion of zebra and quagga mussels.