Tracing the course of phosphorus pollution in Lake Pepin

In recent years, many lakes in the upper Midwest have been experiencing unprecedented algae blooms. These blooms threaten fish and affect recreational activities. A key culprit implicated in overgrowth of algae in lakes is phosphorus (P). Lake Pepin, located on the Minnesota/Wisconsin border, has seen increasing phosphorus concentrations over time. Researchers are now trying to identify upstream factors that could explain this increase.

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