What is the biggest problem in the Great Lakes?

The Great Lakes, the largest system of fresh surface water in the world, face several significant problems that threaten their health and biodiversity.

One of the most pressing issues is invasive species, such as zebra and quagga mussels. These invaders disrupt the food web by outcompeting native species for resources and habitat. They’re primarily responsible for damaging the bottom of the food web, leading to less food for fish.

Pollution is another major concern. The largest source of pollution in the Great Lakes is phosphorus runoff from farmland. This nutrient feeds cyanobacteria, leading to harmful algal blooms that can make humans and animals sick. Industrial and pharmaceutical pollution is also a huge issue, with many factory towns surrounding the Great Lakes’ shores.

Climate change is altering the lakes and streams that flow to the Great Lakes in many ways. The effects of climate change are visible in the behavior of aquatic insects and the absence of some fish.

Efforts are being made to protect and restore the Great Lakes, targeting these significant problems. However, each waterway has a unique set of characteristics that have contributed to its ecological impairment, requiring a unique set of interventions.

In conclusion, the biggest problems facing the Great Lakes are invasive species, pollution, and climate change. These issues pose significant challenges, but with continued research and conservation efforts, there is hope for the future of these vital ecosystems.