IB ESS HL 4.4.10 (HL)—Harmful algal blooms Question Bank

• Algal blooms may produce toxins that threaten the health of humans and other animals

• Harmful algal blooms (HABs) contain a variety of organisms, including cyanobacteria, protists, algae and dinoflagellates

• A small number of these organisms produce potentially fatal toxins

• In freshwater, cyanotoxins are the most common toxins