The Great Lakes: A Global Freshwater Treasure
Explore the Great Lakes, one of the world’s largest freshwater systems. Learn why they are ecologically and recreationally important and how divers can help protect them.
PRESERVING OUR GREAT LAKES AND OCEANS
The Great Lakes: A Global Freshwater Treasure
The Great Lakes—Superior, Michigan, Huron, Erie, and Ontario—are more than a regional resource. Together, they contain roughly 20% of the world’s surface freshwater, making them a vital resource for drinking water, recreation, and wildlife. For divers, these lakes offer a unique underwater world, from historic shipwrecks to fascinating geological formations, all teeming with freshwater life.
Beneath the surface, the lakes support diverse ecosystems. Fish like lake trout, walleye, and smallmouth bass swim among aquatic plants, while invertebrates and other species thrive in hidden niches. Shipwrecks act as artificial reefs, attracting marine life and creating compelling dive sites. The landscapes themselves—sandbars, cliffs, and deep basins—tell stories of the region’s glacial history.
These treasures, however, are under pressure. Pollution, invasive species, and climate change all pose challenges. Nutrient runoff can create harmful algal blooms that reduce water quality and impact aquatic life. Invasive species like zebra mussels disrupt ecosystems, affecting fish populations and underwater habitats. For divers, these issues can influence visibility, safety, and the overall experience beneath the waves.
Divers can take meaningful action to help protect the lakes. Participating in underwater cleanups removes debris that threatens wildlife. Reporting sightings of invasive species to local programs helps manage their spread. Practicing responsible diving—avoiding contact with fragile structures and leaving wildlife undisturbed—minimizes impact on the ecosystem. Educating others about freshwater conservation amplifies these efforts, helping preserve the lakes for future generations.
By understanding and respecting the Great Lakes’ ecological importance, divers not only enjoy safer and more engaging experiences underwater—they also become active stewards of one of the world’s most significant freshwater resources. Every responsible dive contributes to maintaining the health and beauty of these vital waters.
Happy and safe diving,
The ScubaBlast Team
NOAA Great Lakes Environmental Research Laboratory. (2023). Great Lakes Facts. Retrieved from https://www.glerl.noaa.gov/
Great Lakes Fishery Commission. (2022). Biodiversity and Ecosystem Overview. Retrieved from https://www.glfc.org/
Environmental Protection Agency. (2023). Great Lakes Environmental Challenges. Retrieved from https://www.epa.gov/greatlakes