"It's one of the most dramatic changes on the upper Mississippi," Larson said ... who writes about environmental issues in the Mississippi River watershed and across Wisconsin.

More than 50 mammal species in the Upper Mississippi. The Mississippi River basin encompasses parts of 31 states and two Canadian provinces and is over 1,245,000 square miles in size.

Throughout the Mississippi River watershed, wetlands store floodwater ... to build new wetlands that reduce flooding risk. In the upper Midwest, researchers found that wetlands save nearly ...