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Scientists Alarmed at Great Barrier Reef Coral Bleaching

By Matt Siegel, Reuters

Australian scientists managing the Great Barrier Reef have lifted their emergency response to the highest level following the publication of video footage of damage caused by coral bleaching.

Authorities this month said that areas of the World Heritage Site were experiencing the worst bleaching in 15 years, at least partially as a result of the current El Niño, one of the strongest in two decades.

A tourist boat floats above an area called the 'Coral Gardens' located off Lady Elliot Island and north-east from the town of Bundaberg in Queensland, Australia, in this June 11, 2015 file photo.
Credit: REUTERS/DAVID GRAY/FILES

Coral bleaching is a process by which coral expels living algae, causing it to calcify. Coral can only survive within a narrow band of ocean temperature.

The Great Barrier Reef Marine Park Authority said it was lifting its response to level three, authority chairman Russell Reichelt said.

"A level-three response level means we’re stepping up surveys in response to the coral mortality to help us better understand the effects of various pressures on the reef and help guide management actions,” Reichelt said in a statement.

The footage, shot by the University of Queensland's CoralWatch group, has raised serious concerns amongst scientists and environmental groups about the growing impact of climate change.

"The new video and stills are very concerning and show large sections of coral drained of all color and fighting for survival," World Wildlife Fund spokesman Richard Leck said in a statement.

"This is the worst coral bleaching event ever to hit this most pristine part of the Great Barrier Reef."

Scientists said the Great Barrier Reef needs a break in El Niño conditions within weeks if some coral areas are to survive, but the Australian Bureau of Meteorology's most recent forecast calls for a continuation of El Niño conditions.

This year will be the hottest on record and 2016 could be even hotter due to El Niño, the World Meteorological Organization has said.

The Great Barrier Reef stretches 1,200 miles along Australia's northeast coast and is the world's largest living ecosystem. It brings in billions of dollars a year in tourism revenue.

UNESCO's World Heritage Committee last May stopped short of placing the Great Barrier Reef on an "in danger" list, but the ruling raised long-term concerns about its future.

Editing by Nick Macfie

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