By KEVIN DUFFY
Capital News Service
LANSING — A new study by researchers based in Ann Arbor suggests that Asian carp would disrupt the food web and decimate native species like walleye if they invade Lake Erie. And that could blunt the economic impact anglers have on nearby communities. A second study by a Michigan State University economics researcher will compare the study’s predicted changes in fish population and the number of fishing trips taken in the region. Invasive silver and bighead carp are already abundant in nearby Great Lakes watersheds . They devour microscopic plants called phytoplankton and animals called zooplankton, the first food of popular fish like walleye and Chinook salmon.