What is the rapid increase in an algae population called?

• A. Algal bloom
• B. Algae bloom
• C. Algae surge
• D. Algae proliferation

Answer: (A)

The rapid growth of algae in water is called an algal bloom. Algal is the correct adjective form related to algae, and bloom conveys a sudden, dense increase in population. This term is the standard way scientists describe a quick, visible surge of algae in lakes, rivers, or seas, often linked to lots of nutrients and sunlight. Blooms can change water color and deplete oxygen, and some are harmful algae blooms that produce toxins. Other phrases like algae bloom, algae surge, or algae proliferation aren’t the usual scientific term for this phenomenon, even though they might be understood, making algal bloom the precise, commonly used wording.