9781422274514

Struggling Life in the Oceans

T he distribution, abundance, and variety of marine life are changing due to global warming. Temperatures and the absorption of carbon dioxide by the oceans and seas are on the rise. Higher carbon dioxide content is making marine waters acidic. This is affecting marine species and is a grave threat to their survival.

Coral Reefs Coral reefs are home to more than 25 percent of all marine life. They are formed by tiny organisms called coral polyps. Rising sea temperatures have proved to be fatal for coral reefs as they affect the growth of the algae that depend on a symbiotic relationship with the reefs and provide them with food. Warm temperatures and less oxygen make the corals expel the algae, which causes them to turn white and die. This is called coral bleaching.

CLIMATE CHANGE: Problems and Progress

12