Global Study Reveals Over Half of Coral Reefs Experienced Bleaching During 2014–2017 Heatwave
An international study found that more than 50% of the world's coral reefs suffered significant bleaching during the 2014–2017 global marine heatwave, with ongoing events posing further threats.
A comprehensive international study has revealed that over half of the world's coral reefs experienced significant bleaching during the 2014–2017 global marine heatwave. The research, which analyzed data from more than 15,000 coral surveys alongside global satellite temperature records, indicates that approximately 51% of reefs suffered moderate to severe bleaching, with around 15% experiencing substantial coral mortality.
The study underscores the escalating impact of ocean warming on coral ecosystems. Researchers noted that heat stress, bleaching, and mortality during this period were more severe than previously recorded. Dr. Mark Eakin, Director at Corals and Climate, stated, "More than half of the world’s coral reefs suffered at least moderate bleaching (10–100% of colonies bleached), while around one-in-six reefs lost over 10% of their corals."
Coral reefs are vital to marine biodiversity, supporting about 25% of marine species, and provide significant benefits to human societies, including coastal protection, fisheries, and tourism. The ongoing degradation of these ecosystems due to rising sea temperatures poses a substantial threat to their survival and the services they offer.
The findings highlight the urgent need for global efforts to mitigate climate change and protect coral reefs from further damage. The study emphasizes that reducing greenhouse gas emissions is crucial to preserving these essential ecosystems for future generations.
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