The spread of invasive Dreissenid mussels has relocated nutrients from the open water to the floor of Lake Michigan. How has this shift impacted the diets of fish and invertebrates in this system? Ben Turshak (University of Wisconsin-Milwaukee) and his co-authors use state-of-the-art stable isotope techniques to determine the impact of these changes on the diets of aquatic organisms. Managers and policymakers can use this information to identify who the winners and losers are in this new Lake Michigan food web and plan their efforts accordingly.