Why Algal Blooms Occur in Spring?

When dissolved oxygen concentration is low in the water (anoxic), sediments release phosphate into the water column. This phenomenon encourages the growth of algae. Early blue–green algal blooms usually develop during the spring when water temperature is higher and there is increased light.

What causes algal blooms to occur?

Algal blooms may occur in freshwater as well as marine environments. ... Some algal blooms are the result of an excess of nutrients (particularly phosphorus and nitrogen) into waters and higher concentrations of these nutrients in water cause increased growth of algae and green plants.

Why do algal blooms occur in the summer?

Warming water temperature

Harmful algae usually bloom during the warm summer season or when water temperatures are warmer than usual. ... Warmer temperatures prevent water from mixing, allowing algae to grow thicker and faster.