Page 24 ■ Thursday, April 5, 2012
NATION & WORLD
of laboratory work, scientists say they can defi nitively fi nger oil from BP’s blown-out well as the culprit for the slow death of a once brightly colored deep-sea coral com- munity in the Gulf of Mexico that is now brown and dull. In a study published March 26, scien-
NEW ORLEANS (AP) — After months
sity who went down to the site in the Alvin research submarine. So far, this has been the only deep-sea
tists say meticulous chemical analysis of samples taken in late 2010 proves that oil from BP PLC’s out-of-control Macondo well devastated corals living about 7 miles southwest of the well. The coral community is located over
an area roughly the size of half a football fi eld nearly a mile below the Gulf’s sur- face.
in October 2010 by academic and govern- ment scientists, but it’s taken until now for them to declare a defi nite link to the oil spill.
The damaged corals were discovered
but coral colonies that pop up every once in a while are vital oases for marine life in the chilly ocean depths. The injured and dying coral today has bare skeleton, loose tissue and is covered in heavy mucous and brown fl uffy material, the paper said. “It was like a graveyard of corals,” said Erik Cordes, a biologist at Temple Univer-
Most of the Gulf’s bottom is muddy,
“They fi gured (the coral damage) was the result of the spill, now we can say defi ntely it was connected to the spill.”
– Chemical oceanographer Helen White
On April 20, 2010, the well blew out about 50 miles off the Louisiana coast, leading to the death of 11 workers aboard the Deepwater Horizon drilling rig and the nation’s largest offshore spill. More than 200 million gallons of oil were re- leased. “They fi gured (the coral damage) was
the result of the spill, now we can say defi - nitely it was connected to the spill,” said Helen White, a chemical oceanographer with Haverford College and the lead re-
coral site found to be seriously damaged by the spill.
BAKKEN BREAKOUT WEEKLY Report: Oil spill culprit for heavy toll on coral
Proceedings of the National Academy of Sciences.
the source of the contamination required sampling sediment on the sea fl oor and fi guring out what was oil from natural seeps in the Gulf and what was from the Macondo well. Finally, the researchers matched the oil found on the corals with oil that came out of the BP well. Also, the researchers concluded that the damage was caused by the spill because an underwater plume of oil was tracked passing by the site in June 2010. The paper also noted that a decade of deep-sea coral research in the Gulf had not found coral dying in this manner. The coral was docu- mented for the fi rst time when researchers went looking for oil damage in 2010. The fi ndings were published in the
back to the dying corals by submarine since 2010, but that they are not ready to talk about what they’ve seen at the site. However, Charles Fisher, a biologist
with Penn State University who’s led the coral expeditions, said recovery of the damaged site would be slow. “Things happen very slowly in the deep sea; the temperatures are low, currents are
The scientists said that they have gone She said pinpointing the BP well as
low, those animals live hundreds of years and they die slowly,” he said. “It will take a while to know the fi nal outcome of this exposure.”
consists of 54 coral colonies. The research- ers were able to fully photograph and as- sess 43 of those colonies, and of those, 86 percent were damaged. They said 10 coral colonies showed signs of severe stress on 90 percent of the coral. White, the lead researcher, said that
BP did not immediately comment. The researchers said the troubled spot
this coral site was the only one found southwest of the Macondo well so far, but that others may exist. The researchers also wrote in the paper that it was too early to rule out serious damage at other coral sites that may have seemed healthy dur- ing previous examinations after the April 2010 spill. Jerald Ault, a fi sh and coral reef spe- cialist at the University of Miami who was not part of the study, said the fi ndings were cause for concern because deep-sea corals are important habitat. He said there are many links between animals that live at the surface, such as tarpon and men- haden, and life at the bottom of the Gulf. Ecosystem problems can play out over many years, he said.
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