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Gulf oysters tainted with heavy metals from oil spill

Caption: Oyster shells like this one, collected from the Gulf of Mexico after the Deepwater Horizon oil spill, have been shown to contain higher concentrations of three heavy metals common in crude oil -- vanadium, cobalt, and chromium -- than specimens collected before the spill.
Credit: California Academy of Sciences

Researchers denied access to pure samples of BP’s Deepwater Horizon oil

By Summit Voice

SUMMIT COUNTY — BP’s oil continues to have toxic after-effects two years after the Deepwater Horizon oil disaster spewed millions of gallons in the Gulf of Mexico.

Scientists tracking the long-term impacts have found devastated corals on the sea floor, sick dolphins in coastal areas and most recently, heavy metal contamination in Gulf oysters linked to the oil.

“While there is still much to be done as we work to evaluate the impact of the Deepwater Horizon spill on the Gulf’s marine food web, our preliminary results suggest that heavy metals from the spill have impacted one of the region’s most iconic primary consumers and may affect the food chain as a whole,” said Dr. Peter Roopnarine, of the California Academy of Sciences.

Roopnarine has detected evidence that pollutants from the oil have entered the ecosystem’s food chain. For the past two years, the team has been studying oysters (Crassostrea virginica) collected both before and after the Deepwater Horizon oil reached the coasts of Louisiana, Alabama, and Florida. Continue reading

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