Tech & Sci
22:23, 20-Jun-2017
Global coral bleaching easing, but still bad
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A mass bleaching of coral reefs worldwide is finally easing after three years, US scientists announced Monday.
About three-quarters of the world’s delicate coral reefs were damaged or killed by hot water in what scientists say was the largest coral catastrophe.
Coral reef table, underwater view. /VCG Photo
Coral reef table, underwater view. /VCG Photo
A global bleaching event was announced by the US National Oceanic and Atmospheric Administration (NOAA) in May 2014, which is worse than previous global bleaching events in 1998 and 2010.
The forecast damage doesn’t look widespread in the Indian Ocean, so the event loses its global scope. Bleaching will still be bad in the Caribbean and Pacific, but it’ll be less severe than recent years, said NOAA coral reef watch coordinator C. Mark Eakin.
Great Barrier Reef, Australia. /VCG Photo
Great Barrier Reef, Australia. /VCG Photo
Places like Australia’s Great Barrier Reef, northwest Hawaii, Guam and parts of the Caribbean have been hit with back-to-back destruction, Eakin said.
Coral reef scientist Julia Baum, University of Victoria, British Columbia, plans to travel to Christmas Island in the Pacific where the coral reefs had looked like ghost towns in recent years. “This is really good news,” Baum said. “We’ve been totally focused on coming out of the carnage of the 2015-2016 El Nino.”
Too early to celebrate
Coral reef with emperor angelfish. /VCG Photo
Coral reef with emperor angelfish. /VCG Photo
Although conditions are improving, it still cannot be considered as optimistic, said Eakin, adding that the world may be at a new normal where reefs are barely able to survive during good conditions.
Eakin said coral have difficulty surviving water already getting warmer by man-made climate change. Extra heating of the water from a natural El Nino nudges coral conditions over the edge.
About one billion people use coral reefs for fisheries or tourism. Scientists have said that coral reefs are one of the first and most prominent indicators of global warming.
“I don’t see how they can take one more hit at this point,” Baum said. “They need a reprieve.”
(Source: AP)