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The world's largest coral reef system, stretching for more than 2,300 kilometers along the northeast coast of Australia, is showing the harmful effects of the heat, said the Reef Authority.
The area, which comprises about 2,500 individual reefs and more than 900 islands, suffers from bleaching when corals expel algae living in their tissues, draining them of their vibrant colors. The mass bleaching report emerged four days after the United Nations began a monitoring mission to assess whether the World Heritage site is being protected from climate change.UNESCO's mission is to assess whether the Australian government is doing enough to address threats to the Great Barrier Reef – including climate change – before the World Heritage Committee considers listing it as"in danger" in June.
"If the government is genuine about letting the UN mission form a comprehensive picture of the state of the Reef, then it must take the mission to the northern and central Reef," Zavan said. Amanda McKenzie, chief executive of Australian climate action body the Climate Council, said the world's oceans reached record high temperatures last year.
An average increase of 1.5 degrees Celsius above pre-industrial levels would see more than 99 percent of the world's coral reefs unable to recover from increasingly frequent marine heatwaves, they reported in the journalAt two degrees of warming, mortality will be 100 percent, according to the study, which used a new generation of climate models.
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