By Matt Reese
There is no question that nutrient contributions from agriculture are a piece of the water quality puzzle in Lake Erie. But, it is also a certainty that agriculture is not the only contributor.
Earlier this year, www.sciencedaily.com reported research clearly linking harmful algal blooms in Florida’s St. Lucie Estuary and human waste. In a yearlong study, water samples provided multiple lines of evidence that human wastewater from septic led to high nitrogen concentrations in the estuary and the awful algal blooms. (Note, for the salt water in the estuary, nitrogen is the key nutrient for harmful algal blooms. In freshwater, the key nutrient is phosphorus). Human manure has significant quantities of both nutrients, to the tune of about 10 pounds of nitrogen and more than a pound of phosphorus per person per year.
From www.sciencedaily.com: “It has long been thought that the algal blooms found in Lake Okeechobee, which are caused by pollution such as runoffs from farms, were solely responsible for driving the blooms and their toxins in the St.… Continue reading