The recovery in the central and northern stretches of the UNESCO world heritage-listed reef contrasted with the southern region.
A recent report found that all three major regions of the reef experienced bleaching after waters began to warm last December.
The Great Barrier Reef Marine Park Authority said most of the marine park had been hit by "significant heat stress" over the summer, with water temperatures as much as 2-4 degrees Celsius above average.
The United Nations Educational, Scientific and Cultural Organization (UNESCO) has warned Australia about the condition of the Great Barrier Reef with “the utmost concern and regret,” and plans to reevaluate in 2022.
Australia to challenge recommendation, accusing UN officials of backflipping on their assurances ahead of the World Heritage Committee’s 44th session in China next month.
At least 33 percent of natural World Heritage sites are threatened by climate change, the UN observer body says. These sites include the Great Barrier Reef in Australia, the world’s largest coral reef.
Local marine biologists say the annual event, off the coast of Queensland in northeastern Australia, could be among the biggest in recent years.
Conservationists say a new funding to restore and protect the Great Barrier Reef is "an important step" while the biggest threat to the reef is global warming.
A study conducted by Deloitte Access Economics found that the Great Barrier Reef is worth $42 billion and underpins 64,000 jobs.
Seven percent of Australia's Great Barrier Reef untouched by mass bleaching
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