A thriving, complex food web is crucial to the health of one of Earth’s largest surface freshwater ecosystems. But introductions and invasions of non-native aquatic plants and animals, the harvesting and stocking of top predator fish, and elevated nutrient and contaminant levels have snarled the Great Lakes food web, affecting fisheries, wildlife, and the health of the ecosystem.
THE LAKES TODAY
More than 180 non-native species with reproducing populations continue to threaten the Great Lakes Basin.
CONNECTED BUT UNIQUE
The Great Lakes system includes the five Great Lakes (Superior, Huron, Michigan, Erie, and Ontario), Lake St. Clair, and their connecting channels. Each lake has distinctive basin features, circulation patterns, and ecologies.
A HIJACKED SYSTEM
Invasive species have rewired the Great Lakes food web. Sea lampreys attack top predators; round gobies…