What is the major nutrient of concern in lake deterioration?

Phosphorus is identified as the major nutrient of concern in lake deterioration due to its significant role in promoting algal blooms and eutrophication. When phosphorus levels in water bodies rise, usually from agricultural runoff, wastewater discharge, or other sources, it can trigger excessive growth of algae. This growth depletes oxygen in the water as algae die and decompose, leading to dead zones where aquatic life cannot survive. Phosphorus is often more limiting than nitrogen in freshwater systems, meaning that an increase in phosphorus typically has a more pronounced effect on ecosystem health and water quality.

In contrast, while nitrogen can also contribute to algal blooms, phosphorus is often identified as the primary factor driving these issues in lakes. Potassium and calcium, although essential nutrients for plant and aquatic life, are not typically associated with the same degree of ecological impact as phosphorus in terms of lake health. Thus, understanding the role of phosphorus in aquatic ecosystems is crucial for effective lake management and restoration efforts.