Mangroves to hasten recovery
Posted by Michille on 26th September 2006
Mangroves to hasten recovery – INQ7.net!
Published on page A1 of the September 26, 2006 issue of the Philippine Daily Inquirer
ARAB EXPERTS with experience in the largest oil spill cleanup in history have recommended working with natural processes after initial interventions to minimize ecological damage.
The experts, who requested anonymity because they were not authorized to talk to reporters, said that based on their experience with history’s largest oil spill after the 1991 Gulf War, the use of chemical dispersants after the first 72 hours “will add no value.â€
The experts, hired by Petron Corp., said in a report made available to the Inquirer that the cleanup efforts must “focus on the physical removal of the oil†from affected surfaces. “Just remove the sludge, then leave the environment to clean itself,†they said.
They said that based on worldwide studies of the long-term effects of oil spills on the environment, “natural recovery might take one to 20 years, but it may be faster for Guimaras because it has lots of mangroves.â€
Mangroves are part of the complex ecosystem found in Guimaras, which also includes sea grass which thrive in shallow salt marshes, and extensive coral reefs surrounding the island.
An independent study, also commissioned by Petron and conducted by a team of Silliman University scientists, found that none of the coral beds had been affected by the oil spill, but several mangrove areas were.
Warning on cleanup
For the mangrove areas affected, the Arab experts recommended skimming the oil from the surface and using oil-absorbent materials to clean the trees. But they cautioned against “heavy cleanup operations (which) may cause more damage.â€
People, they said, should not be allowed to go to the “subliteral area (because) crabs (are) still alive and working†in the natural rehabilitation process.
The experts said rehabilitation work could begin after three to six months by replanting mangrove seedlings. They advised against pulling out dead trees “because roots are intertwined.â€
For the sea grass areas, the experts said “heavy cleanup operations may cause more damage. They suggested removing the oil from the water surface and adding fertilizer to speed up revegetation.
Sea grass beds form an important part of the marine ecosystem. Aside from providing a buffer for coral reefs to protect coasts and mangroves from strong waves, sea grass support a host of marine life.
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