Part Three, Flooded Duck River, Centerville, Tennessee

Part Three, Flooded Duck River, Centerville, Tennessee, three days after
the rain ended ... Like most rivers in areas that are becoming more
developed, the Duck faces a variety of threats. The most immediate
stresses have to do with water quality. Increases in storm-water runoff,
sewage treatment outflows, and chemical and nutrient loading from
farmland can all have significant negative impacts on freshwater
creatures. The Duck River contains more species of fish than all of the
rivers of Europe combined and has more fish varieties per mile than any
other river in North America. Overall the Duck supports a remarkable
diversity of freshwater animals in its waters, including 151 species of
fish, 60 freshwater mussel species, and 22 species of aquatic snails.