Sunscreen
Sunscreen and Coral
Sunscreen and reefs
It has been proven that sunscreens cause complete and rapid bleaching of hard corals, even at extremely low concentrations. This negative effect is the result of organic ultraviolet filters, which cause zooxanthellae with infections to enter a lytic viral cycle. By fostering this viral infection, sunscreens could play a influential role in coral bleaching in areas exposed to high levels of human recreation. [1] It was calculated that 10% of the reefs in the world could be threatened by sunscreen induced bleaching. This calculation is a result of the estimations that in tropical countries somewhere between 16,000 and 25,000 tons of sunscreens will be applied, and of that amount at least 25% will be washed off in the ocean. This leads to a potential release of 4,000–6,000 tons/year of sunscreen in reef areas. This number will only increase as humans continue to increase their use of the reefs. [1]
Coral bleaching and sunscreen
Chemical compounds in sunscreens and other personal care products are potentially harmful to the environment.