What nutrient is commonly associated with promoting algal blooms in water bodies?

Phosphorus is widely recognized as a key nutrient that fosters algal blooms in aquatic environments. This is primarily because phosphorus serves as a crucial limiting nutrient for algal growth in many freshwater systems. When excess phosphorus enters a body of water, often from sources such as agricultural runoff, wastewater discharge, or urban stormwater, it can lead to a rapid increase in algal populations.

Algal blooms can have significant ecological impacts, including the depletion of oxygen in the water as the algae die and decompose, which can harm aquatic life. In some cases, certain algal blooms can also produce toxins that pose risks to both aquatic ecosystems and human health.

In contrast, other nutrients like calcium, iron, and potassium typically do not trigger algal blooms to the same extent as phosphorus does. While these nutrients are essential for plant growth, they do not act as the primary stimulants for algal proliferation. Therefore, phosphorus is specifically highlighted for its role in promoting these problematic algal blooms.