Global coral reef coverage is at risk of irreversible decline, according to a report from the Global Coral Reef Monitoring Network released on Monday. The report found that coral reefs, which cover about one percent of the ocean but support roughly a quarter of marine species, are experiencing bleaching events so frequent that recovery periods are insufficient. Since 2010, overall coral cover has dropped sharply, and the 2023 bleaching event affected 77 percent of the world’s reef areas, the most extensive on record. Scientists warn that another widespread bleaching is very likely this year because of sustained high sea surface temperatures linked to an intensifying El Niño.
Manuel Gonzalez Rivero, a researcher at the Australian Institute of Marine Science and lead author of the report, said, “If we give them enough time, they have the capacity to recover. But we haven’t seen that amount of time being allowed. The frequency of bleaching events has roughly doubled.” Bleaching occurs when corals expel the symbiotic algae that provide their color, leaving the organisms vulnerable to starvation and disease. While bleached coral are not immediately dead, they require cooler water to regain their algae and survive.
The GCRMN’s findings come as the Pacific Islands Forum prepares to hold its annual summit, with at least five of the 18 member leaders planning to miss the meeting. The forum, long regarded as a symbol of regional unity, regularly addresses climate change and ocean health issues.

