New York Times: Assessing widespread reports of reef stress along with unusually high sea-surface temperatures, the National Oceanic and Atmospheric Administration is warning of a globe-spanning bleaching of corals in coastal waters around the tropics. Below you can learn what can be done in reef regions to limit the ecological impact of such events. When stressed by sustained high temperatures, the coral organisms that build reefs sometimes expel the symbiotic algae living in their tissues, causing affected areas...