The study documents a "dramatic" shortening of time between coral bleaching episodes in the same area, threatening the future existence of these iconic ecosystems and means of subsistence for millions of people.
"The time between whitening events in each location has decreased five times in the last three or four decades, since once every 25 years in the 1980s to an average of once every six years since 2010, "said study lead author Terry Hughes.
Director of the Center for Excellence in Coral Reef Studies (Coral CoE) ) explained that mbadive coral bleaching was "unheard of" in the 1980s, even under strong El Niño conditions.
"Now the episodes repeat Regional bleaching and mbad coral mortality have become the new norm worldwide as temperatures continue to rise, "Hughes underlined.
The report presented today showed that temperatures in the tropical seas They are warmer now than the average of what they were 40 years ago during El Niño periods, reports Informe 21.
Coral bleaching is a response to stress caused by exposure of coral reefs to high ocean temperatures .
"When bleaching is severe and prolonged, many of the corals die and it takes at least a decade to replace even the fastest growing species," said another of the researchers participating in the study, Andrew Baird.