Algae blooms cause hypoxia by their decomposition at the bottoms of bodies of water. Through harvesting the algal biomass, no such decomposition can take place

Algae blooms cause hypoxia by their decomposition at the bottoms of bodies of water. Through harvesting the algal biomass, no such decomposition can take place and a hypoxic environment is not created. In addition, algae produce oxygen, so as long as the algae are removed after, water might become more oxygenated through algal treatment.