Dr. Tom Hrabik, UMD associate professor, talks about some of the animals, including shrimplike creatures and fish, living in Lake Superior and the lake’s multiple food.

UMD grad Andrea Crouse comments on how land use and weather combine to muddy Lake Superior's streams.

National Weather Service warning coordinator meteorologist, Carol Christenson, talks about Lake Superior's warmer by the lake winters.

John Lindgren, fisheries specialist with the Minn. DNR, explains how the St. Louis River Estuary became impaired and what has been done to improve this Great Lakes Area of Concern.

Environmental consultant Connie Fortin describes how road deicers affect lakes and streams, and explains the strategic application of rock salt.

Dr. Gerald Niemi, professor of biology with the University of Minnesota, talks about habitat challenges facing birds that nest around the Great Lakes.

Gerald Ankley, a toxicologist with the EPA Laboratory in Duluth, talks about endocrine disrupting chemicals, hormone and hormone mimics that affect fish reproduction and development.

Josef Werne, associate professor at the University of Minnesota Duluth, describes how sediment cores taken from Lake Superior reflect human activities over the last 200 years.

Donn Branstrator, associate professor with the University of Minnesota Duluth, talks about how invasive zooplankters are altering some Minnesota's waters.

Professional tournament anglers care about invasive species. Sea Grant's Doug Jensen talks about how masters on the fishing circuit are stopping aquatic hitchhikers.