Massive Coral Bleaching in Indonesia
18 August 2010
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A dramatic rise in the surface temperature of Indonesian waters has resulted in a large-scale bleaching event that has devastated local coral populations. Following a report of a bleaching incident in May, WCS-Indonesia dispatched a “Rapid Response Unit” of marine biologists to investigate. Their initial survey revealed that over 60 percent of corals have bleached. The incident took place in the province of Aceh, on the northern tip of the island of Sumatra.
Coral “bleaching,” or whitening, occurs when algae living within coral tissues are expelled. The condition results from stress triggered by environmental factors such as sea surface temperature fluctuations. Some bleached corals may recover over time, while others die.
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Of particular concern is the scale of the sea surface temperature anomaly, which the NOAA website indicates has affected the entire Andaman Sea and beyond. Similar mass bleaching events in 2010 have now been recorded in Sri Lanka, Thailand, Malaysia and many parts of Indonesia.
“This is a tragedy not only for some of the world’s most biodiverse coral reefs, but also for people in the region, many of whom are extremely impoverished and depend on these reefs for their food and livelihoods,” said WCS-Marine Program Director Dr. Caleb McClennen. “It is another unfortunate reminder that international efforts to curb the causes and effects of climate change must be made if these sensitive ecosystems and the vulnerable human communities around the world that depend on them are to adapt and endure.”
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