As a result, both lakes are eutrophic, containing many nutrients found in fertilizer, soil, and waste from people and animals. Blooms of algae and other aquatic plants supported by the nutrients deplete the oxygen in the lakes and make it hard for fish to survive.
Consequently, both lakes have high nutrient levels, including those from fertilizer, soil, and human and animal waste. The proliferation of algae and other water plants consumes the oxygen in the lakes, making it difficult for fish to thrive.