About 33% of coral species threatened...

About 33% of coral species threatened with extinction, study says

There are 3 comments on the Los Angeles Times story from Jul 11, 2008, titled About 33% of coral species threatened with extinction, study says. In it, Los Angeles Times reports that:

FORT LAUDERDALE, FLA. -- Nearly one-third of the small animals that make up the most massive and elaborate structures in coral reefs face an elevated risk of extinction from global warming and various local ...

Join the discussion below, or Read more at Los Angeles Times.

“One never knows,do one?”

Since: Nov 07

Boston,Ma

#1 Jul 13, 2008
Is there ever any GOOD news?
Beena

Athens, Greece

#2 Jul 23, 2008
What is the temperature sensitivity of coral reefs?
Chris

Wilmington, NC

#3 Jul 23, 2008
Typically temperatures of 1-2 C above the normal summer high sustained for 4 weeks or more is sufficient to cause coral bleaching. Depending on the reef, those temperatures are typically in the range of ~29.5-33 C. Higher temperatures for shorter periods also cause bleaching. The more severe the bleaching, the higher the rates of mortality. For example, bleaching during the 1998 mass bleaching event was especially bad in the Indian Ocean. Mortality was on the order of 90-99% on those reefs. Mortality was less severe most other places:~5-50%. The bleaching event of 2005 in the Caribbean killed ~40% of the corals on Puerto Rican reefs.

High temperature anomalies also increase the incidence of coral disease and hence mortality. Mortality from disease is in addition to those caused by bleaching.

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