Tag: Deepwater horizon oil spill

New study says Deepwater Horizon oil disaster caused fetal and newborn dolphin deaths in the Gulf of Mexico

 Lung abnormalities found in 88% of perinatal dolphins in spill zone

dolphins Deepwater Horizon spill
New research shows how harmful the Deepwater Horizon oil disaster was for dolphins in the spill zone. @bberwyn photo.

Staff Report

Scientists studying the aftermath of the 2010 Deepwater Horizon oil disaster in the Gulf of Mexico say results of a recently completed four-year study of dolphin strandings confirm that the spill took a toll on marine mammals.

“Our new findings add to the mounting evidence from peer-reviewed studies that exposure to petroleum compounds following the Deepwater Horizon oil spill negatively impacted the reproductive health of dolphin populations living in the oil spill footprint in the northern Gulf of Mexico,” said Dr. Teri Rowles, a veterinarian with the National Oceanic and Atmospheric Administration’s Marine Mammal Health and Stranding Response Program and a co-author on the study. Continue reading “New study says Deepwater Horizon oil disaster caused fetal and newborn dolphin deaths in the Gulf of Mexico”

Gulf of Mexico dolphin die-off linked with exposure to oil from 2010 Deepwater Horizon disaster

‘Dolphins are particularly susceptible to inhalation effects due to their large lungs, deep breaths and extended breath hold times’

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A bottlenose dolphin in the Gulf of Mexico. @bberwyn photo.

Staff Report

FRISCO — The 2010 Deepwater Horizon oil disaster in the Gulf of Mexico led directly to the worst dolphin  die-off on record in the northern Gulf of Mexico, scientists reported last week.

The new study published in the online journal PLOS ONE, linked the dolphin deaths with exposure to oil from BP’s failed Macondo Well. The scientists found that dead bottlenose dolphins stranded in the northern Gulf of Mexico since the start of the Deepwater Horizon oil spill have lung and adrenal lesions consistent with petroleum product exposure. Continue reading “Gulf of Mexico dolphin die-off linked with exposure to oil from 2010 Deepwater Horizon disaster”

Still more questions than answers about the ecological effects of oil dispersants used in Gulf of Mexico

Scientists say more study needed before the next big spill

Oil from the Deepwater Horizon disaster approaches the Alabama coastline. Courtesy U.S. Navy.
Oil from the Deepwater Horizon disaster approaches the Alabama coastline. Courtesy U.S. Navy.

Staff Report

FRISCO — Fallout from the 2010 Deepwater Horizon oil disaster is still rippling through the Gulf of Mexico — and through the scientific community studying the effects of the largest oil spill on record.

Along with 210 million gallons of crude oil that leaked from BP’s failed deep-sea well, cleanup workers applied 1.84 million gallons of chemical dispersant intended to break down the oil and prevent it from reaching the shoreline in massive quantities. Continue reading “Still more questions than answers about the ecological effects of oil dispersants used in Gulf of Mexico”

Study says dispersants deadlier to coral than oil

One of the impacted corals with attached brittle starfish. Although the orange tips on some branches of the coral is the color of living tissue, it is unlikely that any living tissue remains on this animal. PHOTO COURTESY Lophelia II 2010, NOAA OER and BOEMR.
As early as 2012, scientists documented how oil and oil dispersants damaged communities of deep sea coral in the Gulf of Mexico. Photo courtesy Lophelia II 2010, NOAA OER and BOEMR.

‘It doesn’t take as much dispersant to kill a coral as it does oil’

Staff Report

FRISCO — New laboratory studies on the use of oil dispersants during the 2010 Deepwater Horizon oil spill show that the dispersant is more toxic to coldwater corals than the spilled oil.

The findings, published near the fifth anniversary of the spill, may help agencies developing future strategies for applying dispersants at oil spills that are more helpful than harmful to the environment, according to the scientists from Temple University and Penn State University. Continue reading “Study says dispersants deadlier to coral than oil”

Study finds massive amounts of oil from Deepwater Horizon disaster buried in Gulf of Mexico sediments

Oil spreading across the Gulf of Mexico in July, 2009. PHOTO COURTESY NOAA.
A NASA satellite image shows oil spreading across the Gulf of Mexico.

‘It’s a conduit for contamination into the food web …’

Staff Report

FRISCO — Five years after BP’s failed Deepwater Horizon drill rig spewed 200 million gallons of oil into the Gulf of Mexico, a significant amount of that oil remains buried in seafloor sediments.

A new study by a Florida State University researcher estimates that about 6 to 10 million gallons of oil are still there, perhaps decomposing slowly, but probably affecting Gulf ecosystems.

“This is going to affect the Gulf for years to come,” said researcher Jeff Chanton. “Fish will likely ingest contaminants because worms ingest the sediment, and fish eat the worms. It’s a conduit for contamination into the food web,” he said. Continue reading “Study finds massive amounts of oil from Deepwater Horizon disaster buried in Gulf of Mexico sediments”

Study finds Deepwater Horizon oil ‘fallout zone’

Satellite view deepwater horizon oil spill
A NASA satellite view shows oil from the Deepwater Horizon disaster spreading across the surface of the Gulf of Mexico.

“Oily particles were raining down around these deep sea corals …’

Staff Report

FRISCO — More than four years after the disastrous failure of BP’s Deepwater Horizon drilling rig sent about 5 million barrels of oil spewing into the Gulf of Mexico, a team of scientists said they’ve found a 1,250-square mile fallout zone, where some of the oil settled to the sea floor in a thin layer.

The researchers, from the University of California, Santa Barbara, the Woods Hole Oceanographic Institution and the University of California, Irvine sampled 534 locations during 12 expeditions in Gulf and collected more than 3,000 samples, finding that the oil is concentrated in the top half-inch of the sea floor. Continue reading “Study finds Deepwater Horizon oil ‘fallout zone’”

Oil-eating microbes in the Gulf of Mexico left behind the most toxic remnants of the Deepwater Horizon spill

Impacts likely to persist for decades

/klj
Oil: Can’t live with it, can’t live without it.

Staff Report

FRISCO — Oil-eating microbes in the Gulf of Mexico may have helped break down some of the pollution from the 2010 Deepwater Horizon disaster, but some of the most toxic constituents of BP’s oil probably remain, most likely at the bottom of the sea.

Two new Florida State University studies in a deep sea oil plume found found that a species of bacteria called Colwellia likely consumed gaseous hydrocarbons and perhaps benzene, toluene, ethylbenzene and xylene compounds that were released as part of the oil spill — but not the polycyclic aromatic hydrocarbons (PAHs), which are a group of semi-volatile organic compounds that are present in crude oil and can cause long-term health problems such as cancer. Continue reading “Oil-eating microbes in the Gulf of Mexico left behind the most toxic remnants of the Deepwater Horizon spill”