A mass bleaching event is taking its toll on the Great Barrier Reef for an unprecedented second year in a row, a Queensland government agency has confirmed.
The Great Barrier Reef Marine Park Authority has declared widespread damage from an underwater heatwave after a single day of aerial surveys between Cairns and Townsville on Thursday.
The authoritys David Wachenfeld told the ABC the survey findings regrettably gave the agency enough evidence to declare another mass bleaching event, following the worst to date in 2016 which killed off 22% of coral.
A repeat of mass bleaching compounds fears for the survival of already-stressed coral, whose recovery since 2016 has been challenged by stubbornly high sea surface temperatures, including through winter.
The scale of bleaching will be confirmed through further surveys by the agency and reef scientists but it is likely to take at least six months before the death rate of coral is known.
Garner, who has been documenting the bleaching with Greenpeace, said: Ive been photographing this area of the reef for several years now and what were seeing is unprecedented.
In these photos nearly 100% of the corals are bleaching and who knows how many will recover? Algae is already beginning to overgrow many of the corals.
WWF oceans campaigner Richard Leck said he was shocked and saddened by what is unfolding.
Scientists warned that without sufficient emissions reductions we could expect annual mass bleaching of the Great Barrier Reef by 2050, he said. Consecutive bleaching events have arrived 30 years early.
Crazy that The Great Barrier Reef looks like it won't survive most of our lifetimes.