A recent global report highlights a significant decline in the proportion of living hard corals on the world’s reefs. The upcoming peak of a potentially record-breaking El Niño event is expected to exacerbate the situation further, with research indicating a heightened intensity in the warming phenomenon. The Status of Coral Reefs of the World 2025 report underscores the impact of marine heatwaves and global bleaching events on coral health, leading to a decrease in hard coral coverage to around 25%.
Lead author Manuel González Rivero notes that coral cover globally has dropped from levels of 30-40% in the 1980s to the current state of decline. The accelerated rate of coral cover loss, at 9.5% in recent years, raises concerns about the shrinking window for recovery due to more frequent extreme ocean heat events.
The report, compiled by the Global Coral Reef Monitoring Network, reveals a consistent downward trend in hard coral cover since 1980, particularly following global bleaching events triggered by rising ocean temperatures. While corals can recover given time, the frequency of such events poses a threat to their resilience. The study also points out regional variations in coral decline, with notable decreases in areas such as Australia, the eastern Pacific, and the Caribbean.
Efforts to address the coral decline include regional interventions to reduce overfishing, pollution, and coastal development, aimed at enhancing reef resilience. However, on a global scale, urgent action to curb greenhouse gas emissions is crucial to mitigate the warming oceans that are driving the loss of coral reefs. The looming impact of a strengthening El Niño event, coupled with the long-term effects of climate change, underscores the need for immediate and sustained conservation measures to protect these vital marine ecosystems.
