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Smithsonian reports regional sea temperature rise and coral bleaching event in Western Caribbean
Date:10/12/2010

The Smithsonian Tropical Research Institute's Bocas del Toro Research Station and Galeta Point Marine Laboratory are reporting an anomalous sea temperature rise and a major coral bleaching event in the western Caribbean. Although the U.S. National Oceanic and Atmospheric Administration, NOAA, issued an advisory in July announcing above-average sea surface temperatures in the wider Caribbean region, there had been no clear indication of increased sea temperatures in Panama and the western Caribbean until late August-early September.

Scientists and local dive operators first noticed coral bleaching in the waters surrounding Isla Colon in Panama's Bocas del Toro province in July. Smithsonian staff scientist Nancy Knowlton and colleagues documented an extensive bleaching event in late September. Station personnel recorded an extreme sea water temperature of 32 degrees C. Normal temperatures at this time of year are closer to 28 degrees C. This warming event currently affects the entire Caribbean coast of Panama from Kuna-Yala to Bocas del Toro and has also been reported at sites in Costa Rica.

An extensive coral reef monitoring network in Panama, established over a decade ago by staff scientist Hctor M. Guzmn of STRI and partially funded by the Nature Conservancy, consists of 33 sites along both the Pacific and Atlantic coasts of the Isthmus, with 11 sites in the Bocas del Toro area. As of Oct. 3, 95 percent of the seafloor at the Bocas del Toro sites had been checked for bleaching. Coral mortality was limited to shallow areas near Isla Colon and a semi-lagoon area in Bocas del Toro, which is considered to be particularly vulnerable to bleaching as water circulation there is slow and temperatures tend to rise quickly. Researchers expect to have a complete report of the state of the coral reefs in several weeks.

Coral polyps, the tiny organisms that make up a coral reef, contain photosynthetic algae called zoxanthellae. Coral bleaching oc
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Contact: Beth King
kingb@si.edu
703-487-3770 x8216
Smithsonian Tropical Research Institute
Source:Eurekalert  

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Smithsonian reports regional sea temperature rise and coral bleaching event in Western Caribbean
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