Almost a third of the Great Barrier Reef’s coral died in ‘catastrophic’ heatwave, study finds; Mark Molloy; Telegraph

Australia – Great Barrier Reef

Australia’s Great Barrier Reef has suffered irreversible damage following a “catastrophic die-off” of coral in 2016 due to a marine heatwave, scientists say.

The Unesco World Heritage Site off the coast of Queensland lost almost a third of its coral during an unprecedented rising water temperatures.

Global warming contributed to sea surface temperatures over the summer months in 2016 rising to the hottest on record on the reef, resulting in severe coral bleaching.

Scientists estimate that 30 per cent of the reef’s coral died in the heatwave from March to November 2016, suggesting global warming is decimating the 1,400-mile ecosystem in north-east Australia.

Corals “began to die immediately on reefs where the accumulated heat exposure exceeded a critical threshold,” a study published in the journal Nature said.

Terry Hughes, the report’s co-author and head of the Centre of Excellence for Coral Reef Studies at Australia’s James Cook University, fears the reef will not survive unless nations tackle climate change by drastically cutting carbon emissions.

Read more from source: Almost a third of the Great Barrier Reef’s coral died in ‘catastrophic’ heatwave, study finds 

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