Coral reefs are a hub of marine biodiversity. They provide food, recreation and shoreline protection to some 1 billion people. But reefs around the globe have seen 50 to 90 percent declines in coral abundance, and forecasts of reef health have been dire. Long-term research by scientists at the NSF Mo’orea Coral Reef LTER Site shows that reducing nutrient pollution and fish overharvesting can help reefs resist and recover from the impacts of large-scale disturbances such as coral bleaching—and may help corals survive in a warming world.