Great Lakes environmental assessment and mapping (GLEAM) project – cumulative ecosystem stress on great lakes

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What is the GLEAM project?

Our research team builds new tools to integrate spatial information for environmental management decisions in the Great Lakes. We aim to build maps to visualize and understand environmental impacts stressors on the lakes and benefits humans enjoy from the lakes. For example, we developed this high resolution map of cumulative ecosystem stress to guide restoration, conservation, and management efforts. This map merges data for all major categories of environmental stressors to the Great Lakes, ranging from climate change to pollution to invasive species. We invite you to explore this interactive map using the pan and zoom tools in the upper left corner, and to browse all of the other information and maps on our site.

Maps are best viewed using Mozilla Firefox, Google Chrome, and Safari web browsers (not Internet Explorer).

Stressors on Great Lakes

Tributary dams
Decreased ice cover
Water temperature warming
Power plants
Charter fishing
Native stocking
Non-native stocking
Invasive species including round goby, sea lamprey and zebra and quagga mussels
Nonpoint nitrogen loading
Nonpoint sediment loading
Toxins including mercury, sediment copper and sediment PCBs.

Rank of Great Lakes for stress:

From most to least stressed:

Lake Ontario 
Lake Erie 
Lake Michigan 
Lake Huron 
Lake Superior

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Please contact us for gifts in kind - Mail your check to: P.O. Box 545934, Surfside, Fl 33154