How does lake turnover make nutrients available to plans?

Lake turnover is a natural process that occurs seasonally, particularly in temperate regions, when water layers mix due to temperature changes. During turnover, colder, denser water sinks, bringing nutrient-rich sediments from the bottom to the surface, where sunlight can penetrate. This nutrient resurgence, especially phosphorus and nitrogen, stimulates the growth of aquatic plants and phytoplankton, which serve as the foundation of the aquatic food web. Consequently, lake turnover plays a crucial role in maintaining ecosystem productivity and health.