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Status of Coral Reefs of the World 2000

Status of Coral Reefs of the World 2000.pdf

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18. STATUS OF CORAL REEFS IN SOUTHERN TROPICAL<br />

AMERICA: BRAZIL, COLOMBIA, COSTA RICA,<br />

PANAMA AND VENEZUELA<br />

JAIME GARZÓN-FERREIRA, JORGE CORTÉS, ALDO CROQUER, HÉCTOR<br />

GUZMÁN, ZELINDA LEAO AND ALBERTO RODRÍGUEZ-RAMÍREZ<br />

ABSTRACT<br />

Five countries have joined a recently created Node <strong>of</strong> <strong>the</strong> GCRMN for Sou<strong>the</strong>rn Tropical<br />

America (STA), covering coral reef areas <strong>of</strong> <strong>the</strong> Eastern Pacific and <strong>the</strong> Western Atlantic.<br />

<strong>Coral</strong> reefs in this region are not extensive because <strong>of</strong> a strong continental influence, but<br />

<strong>the</strong>y support important biodiversity reservoirs and an expanding tourism industry. Most<br />

coral reefs in STA have undergone major changes in <strong>the</strong> last 30 years, in particular during<br />

<strong>the</strong> 1980s, due to natural and anthropogenic agents. There have been important losses <strong>of</strong><br />

live coral cover in many reef areas and transitions to algal dominated reefs. Never<strong>the</strong>less,<br />

considerable levels <strong>of</strong> coral cover can still be found at numerous locations on <strong>the</strong><br />

Caribbean (means between 20-40%) and Pacific (means above 40%) coasts. Bleaching<br />

events appear to have increased in frequency, but decreased in severity, throughout <strong>the</strong><br />

1990s, which could be related to <strong>the</strong> global warming phenomenon. The 1997-98 strong<br />

ENSO event in <strong>the</strong> Pacific generated only moderate bleaching and low coral mortality<br />

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