From the Chicago Sun-Times:

If huge, hungry Asian carp end up reaching Lake Michigan, their long-dreaded invasion might turn out to be less ferocious than once expected because a tiny competitor is gobbling up their primary food source, some Great Lakes researchers say.

The quagga mussel — a thumbnail-sized foreign mullosk first spotted in the lakes two decades ago — has devoured so much plankton in southern Lake Michigan that the entire food web is being altered, federal and university scientists say in a series of newly published articles. Read more.