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Loss of Great Barrier Reef
August 14 , 2025
14 hrs 0 min
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- The Great Barrier Reef has recorded its highest annual loss of live coral since monitoring began 39 years ago.
- Coral loss followed a mass bleaching event in 2024 was driven by climate change-related heat stress.
- Despite this loss, total coral cover remains near the long-term average due to growth since 2017.
- The reef system covers 344000 square kilometers off the northeast coast of Australia.
- The reef is divided into three regions, with coral losses in 2024 of nearly one-third in the south.
- The northern section lost a quarter of its coral and the central section saw a 14 percent decline.
- The 2023 to 2024 global heatwave led to the fourth and worst recorded global coral bleaching event.
- Heat stress affected nearly 84 percent of the world's reef areas, including the Great Barrier Reef.
- Coral bleaching occurs when prolonged high temperatures cause corals to expel algae and turn white.
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