An aerial view of the Great Barrier Reef off the coast of the Whitsunday Islands, along the central coast of Queensland.
WARSAW, Poland - Unesco said Thursday its World Heritage Committee (WHC) had decided not to place the Great Barrier Reef on its list of sites "in danger", despite concern over coral bleaching.
A WHC spokesperson said the Committee, which was meeting in Poland, had made the decision late Wednesday and expressed "deep concern" over two years of back-to-back mass coral bleaching which aerial surveys found had affected some two-thirds of the World Heritage-listed site.
The bleaching was the result of warming sea temperatures linked to climate change.
In reaching its decision, the Committee noted Australian attempts to preserve the largest living structure on Earth under its Reef 2050 Plan and did not find it necessary to place the site on its danger list, spokeswoman Anika Paliszewska said, despite fears on whether conservation targets can be met.
WHC lauded "major efforts deployed by all those involved" in the Australian preservation plan but "strongly encourages (Australia) to step up efforts to ensure that medium- and long-term objectives fixed by the Plan are met, which is essential for the global resilience" of the reef.
In a draft report to the WHC last month, UNESCO said climate change remained the most significant threat to the future of the coral expanse which stretched for some 2,300km and criticised Australia for slow progress towards achieving water quality targets.
The reef was notably threatened by a proliferation of crown-of-thorns starfish, a coral predator which has a devastating impact on coral reef ecosystems.
FILE: The coral-eating starfish at Australia's Great Barrier Reef which has lost more than half its coral cover in the past 27 years due to storms, poisonous starfish and bleaching linked to climate change. CREDIT: KATHARINA FABRICIUS / AIMS / AFP
A Deloitte Access Economics report commissioned by the Great Barrier Reef Foundation last month stated that the site was an asset worth $42-billion (R564-billion) supporting 64,000 jobs and as an ecosystem and economic driver was "too big to fail."
That report was the first time the economic and social value of the reef - which was bigger than Britain, Switzerland and the Netherlands combined - had been calculated.
As well as the problem posed by starfish, the site was also under pressure from farming run-off and development.
The report's lead author, John O’Mahony, said the study made clear the reef was "priceless and irreplaceable" both in terms of its biodiversity and its job-creating potential.
Australia in May hosted a summit of more than 70 of the world's leading marine experts to work on a blueprint on how best to respond to the threats facing the reef.
Options explored included developing coral nurseries, culling of crown-of-thorns starfish, expanding monitoring systems and identifying priority sites for coral restoration.
In April, Australia's independent Climate Council warned further damage to the reef could cut tourism by more than a million a year, costing up to Aus$1.0 billion and also around 10,000 jobs.
Canberra committed more than Aus$2.0 billion to protect the site over the next decade but had been criticised for backing a huge coal project by Indian mining giant Adani near the reef, which environmentalists warn would harm the natural wonder.