Two-thirds of Australia's Great Barrier Reef showed the largest amount of coral cover in 36 years, but the reef remains vulnerable to increasingly frequent mass bleaching, an official long term monitoring programme reported on Thursday.
The recovery in the central and northern stretches of the UNESCO world heritage-listed reef contrasted with the southern region, where there was a loss of coral cover due to crown-of-thorns starfish outbreaks, the Australian Institute of Marine Sciences said in its annual report.
In a key measure of reef health, AIMS defines hard coral cover of more than 30% as high value, based on its long-term surveys of the reef. However in the southern region, which generally has higher hard coral cover than the other two regions, cover fell to 34% in 2022 from 38% a year earlier. "These latest results demonstrate the Reef can still recover in periods free of intense disturbances," Hardisty said.
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