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Caribbean reef loses color

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Saturday, 05 September 2009

It seems fading coral reefs in the Caribbean and this year may reach a record. The reason is the high water temperature, which persists also in September - scientists warn of the National Oceanic and Atmospheric Administration Coral Reef Watch. "We are concerned that high temperatures may be this year threaten the health of coral reefs" - said Dr. Mark Eakin, coordinator of the coral reef monitoring program. Researcher hopes that officials warned about the threat, you can take steps to protect corals. Fading coral is a condition that seriously injure or even kill entire coral reefs. Corals contain microscopic algae which provide them food and give them their vibrant colors. When sea water is too warm, corals pale. They live in symbiosis with algae dramatically increase the rate of photosynthesis, producing in the tissues of polyps too many toxins. Therefore, corals get rid of their comrades and color fade. Without the algae can not produce carbonate skeleton, which is the foundation of the reef. Fading process can cause the water temperature has increased about 1 degree Celsius. Until now, the temperature of tropical oceans has risen by 1 degree Celsius over the past 100 years. However, is expected to increase further. Corals feel best in water temperatures around 26 degrees Celsius. When the sea is heated above 29 degrees Celsius, it becomes unbearable for them. The phenomenon of coral bleaching was observed for the first time in 1979 around the islands of Okinawa and Easter, off the coast of northeastern Australia and the Caribbean Sea. They were then to be incidental. But in the years 1982 and 1983 were attacked reefs on the east coast of Africa, Indonesia and the western coasts of Central and South America. Then the plague struck the reef: Taiwan, Hawaii, Fiji and throughout the Great Barrier Reef. The problem took on a particularly acute form in 1998 when there was "great fade" around the world. The only region where reefs are based on the disease are isolated central Pacific atolls. Corals play a crucial role in the ocean, providing shelter, food and spawning grounds for a quarter of all ocean species and helping to maintain the structure of the coastal environment.

Last Updated ( Saturday, 12 September 2009 )

 

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