The birds were assessed at known water-contaminated locations including ... waterbird nesting areas on the St. Marys River and Lake Superior. The contrasts were stark: Nonviable embryos were ...
In December, Lake Superior had a minimum water level of 601.08 feet and a maximum of 601.35 feet. These levels are just below Lake Superior's long-term average for December recorded at 601.74 feet.
Gulls and terns studied in known polluted shoreline areas had a host of worse health and reproductive outcomes than those in nonpolluted areas.
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