‘Global coral reef coverage risks irreversible decline’

Coral reefs are grappling with an alarming frequency of bleaching events, potentially leading to an irreversible decline in global coral cover, according to a new report from the Global Coral Reef Monitoring Network (GCRMN). The frequency of these bleaching events has nearly doubled, placing the delicate ecosystems at an unprecedented risk, the lead author of the study, Manuel Gonzalez Rivero, cautioned.

Gonzalez Rivero, a scientist at the Australian Institute of Marine Science, explained that corals expel the vibrant algae living in their tissues during bleaching events. This algae loss leaves the corals vulnerable and susceptible to starvation and disease. While bleached corals are not dead, they are highly dependent on cooler water conditions to recover.

The report highlights a stark contrast in coral cover levels since 2010. "We had 40 years of coral cover around the world that had remained relatively unchanged until 2010," noted Gonzalez Rivero. "Since 2010, there has been a very steep change." This abrupt shift underscores the rapid deterioration of these vital marine ecosystems, with global coral cover now significantly lower than normal levels.