Can phytoplankton pollute the water

Phytoplankton themselves are not pollutants, but their excessive growth, known as algal blooms, can lead to water quality issues. These blooms can produce toxins that are harmful to aquatic life, humans, and animals, and can deplete oxygen levels in the water, leading to dead zones. Factors such as nutrient runoff from agriculture can trigger these blooms, highlighting the complex relationship between phytoplankton and water pollution.