A reservoir with high nutrient levels such as phosphates and nitrogen is described as what?

A reservoir characterized by high nutrient levels, particularly phosphates and nitrogen, is referred to as eutrophic. Eutrophication is a process that leads to the excessive growth of algae and aquatic plants in water bodies, which occurs when there are abundant nutrients available. This can lead to problems such as depleted oxygen levels as the organic material decomposes, potentially harming aquatic life.

In contrast, an oligotrophic body of water has low nutrient levels and is typically clear with low biological productivity. Mesotrophic waters have intermediate nutrient levels, while hypereutrophic waters experience extreme levels of nutrients leading to severe algal blooms and water quality issues. The distinction is important for understanding the ecological status and management of water bodies, as well as anticipating the environmental impacts of nutrient runoff and pollution.