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GIS data reveals Caribbean reef threat

Nearly two-thirds of Caribbean coral reefs are currently under threat from human activities, a report by scientists at the World Resources Institute (WRI), Washington DC, USA has revealed. Using GIS data to determine reef degradation, the report studied an area of around 10,000 square miles covering the entire Caribbean reef system. Developments such as sewage discharge, water-based sediment and pollution coming from farms, marine-based pollution from sources such as cruise ships, and over-fishing were primarily taken into account, though natural phenomena such as hurricanes were also considered.

“We estimate that many of the region’s reefs are threatened from direct human pressures, such as over-fishing, runoff of pollution and sediments from the land, and the overreaching threats of coral bleaching from warming oceans, coral disease from new pathogens and ravages of increased hurricane frequency are additional threats that put even more reefs at risk.” lead author of Reefs at risk in the Caribbean Lauretta Burke stated.

The report also showed that the Caribbean’s natural reefs provided shoreline protection from extreme weather by dissipating wave and storm energy, saving between US $700 million and US $2.2 billion every year. Dive tourism also generates around US $2.1 billion for the region each year, but WRI warned that reef degradation could cause this to be cut by around US $300 million annually by 2015 if nothing was done to preserve the coral.