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Study: Severe low temperatures devastate coral reefs in Florida Keys
Date:8/8/2011

just one stressor among many." Other threats to coral health include increased seawater temperatures, diseases, ocean acidification, and pollution. "Adding stress from wintertime cold episodes could not only quickly kill corals but also may have long-term effects," he said. "For corals found in the Florida Keys, winter is typically a 'non-stressful' time and corals bulk up on tissue reserves that are important for surviving potentially 'stressful' summertime conditions (i.e. coral bleaching)."

Kemp said that researchers at NOAA attribute the record-breaking cold anomaly to a negative trend in the North Atlantic oscillation, an atmospheric pressure pattern that influences the weather in the northern hemisphere. "They speculate that if the trend continues, these kinds of extreme cold events may become more frequent," he said.

Kemp stressed that the study's findings should not be interpreted to downplay the major role of higher temperatures on corals' decline. "The study shows that warming may not be the only climate-related problem for coral reefs in the future," he said.

Kemp also pointed out that it was not only the corals that were devastated by the cold snap. "The corals provide the framework for the entire reef ecosystem," he said. "The lobster, shrimp, clams, fishall the creatures that depend on the reefwere affected too. The potential consequences for coral ecosystems are extremely alarming."


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Contact: Dustin Kemp
dkemp1@uga.edu
706-542-6384
University of Georgia
Source:Eurekalert  

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