Because of the dam, the aquatic food web in the Colorado River below the dam has been substantially altered. Cooler water is now pulled from the bottom of Lake Powell and is dumped into the river ...

A study found flatheads occupy the highest level in the food web, forcing native species like smallmouth bass to change their diets. The invasive catfish are growing much faster and larger in the ...

Flathead catfish are rapidly reshaping the Susquehanna River’s ecosystem. Once introduced, these voracious predators climbed to the top of the food chain, forcing native fish like channel catfish and ...