Posted on June 12, 2014 by Bob Berwyn
Evidence is mounting that BP’s oil harmed millions of large fish
Crude oil spreads across a wide swath of the Gulf of Mexico during the 2010 Deepwater Horizon oil disaster.
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By Summit Voice
FRISCO — Along with fouling beaches and wetlands along the Gulf Coast, the 2010 Deepwater Horizon oil spill also had profound impacts on the open ocean and deep sea environment. The four million barrels of crude oil that spewed into the Gulf of Mexico from BP’s failed oil drilling operation potentially exposed millions of fish and other ocean organisms to highly toxic compounds.
That includes many commercially and ecologically important open-ocean fish species such as bluefin and yellowfin tunas, mahi mahi, king and Spanish mackerels. In one of the most recent followup studies on the impacts of the spill, researchers with the University of Miami Rosenstiel School of Marine and Atmospheric Science found that exposure to the crude oil resulted in decreased swimming performance in young mahi mahi. Continue reading
Filed under: BP Gulf oil spill, Environment, oil drilling | Tagged: Deepwater Horizon, Environment, Mahi-mahi, Oil spill | Leave a comment »
Posted on September 25, 2013 by Bob Berwyn
Study finds extensive loss of biodiversity
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.
By Summit Voice
FRISCO — It will probably take decades for the sea-bottom ecosystem to recover from the 2010 Deepwater Horizon oil spill disaster in the Gulf of Mexico, researchers reported this week in the journal PLoS One, after finding that the spill affected sea-bottom biodiversity across 57 square miles around the wellhead, with the most severe impacts in a nine-square mile area.
Previous studies had also shown that the oil spill had damaging effects on deep-sea corals miles from the blown out Macondo Well. The failed well leaked an estimated 160 million gallons of oil into the sea in the spring and summer of 2010. An early survey of nine sites more than 12 miles from the Macondo Well found deep-water coral communities unharmed. But a followup dive by a remotely operated submarine about six miles southwest of the spill discovered numerous coral communities covered in a brown flocculent material and showing signs of tissue damage.
“The tremendous biodiversity of meiofauna in the deep-sea area of the Gulf of Mexico we studied has been reduced dramatically,” said Jeff Baguley, University of Nevada, Reno expert on small invertebrates livING in both marine and fresh water. “Nematode worms have become the dominant species at sites we sampled that were impacted by the oil. So though the overall number of meiofauna may not have changed much, it’s that we’ve lost the incredible biodiversity.” Continue reading
Filed under: biodiversity, BP Gulf oil spill, Environment, gas drilling, oil drilling | Tagged: benthic biodiversity, Environment, Gulf of Mexico, oil spills | Leave a comment »
Posted on July 18, 2013 by Bob Berwyn
A massive slick from the Deepwater Horizon oil spill spreads across the Gulf of Mexico in July 2010. Photo courtesy NASA.
Oil ‘fingerprinting’ technique shows the oil is likely from the wreckage of the sunken drill rig
By Summit Voice
FRISCO — Chemical fingerprints show that oil sheens in the Gulf of Mexico are probably from pockets of oil trapped within the wreckage of the sunken Deepwater Horizon drilling rig. Both the Macondo well and natural oil seeps common to the Gulf of Mexico were confidently ruled out by researchers from Woods Hole Oceanographic Institution and the University of California, Santa Barbara. The study was published online this week in Environmental Science & Technology.
The oil sheens were first reported to the United States Coast Guard by BP in mid-September 2012, raising public concern that the Macondo well, which was capped in July 2010, might be leaking.
“It was important to determine where the oil was coming from because of the environmental and legal concerns around these sheens. First, the public needed to be certain the leak was not coming from the Macondo well, but beyond that we needed to know the source of these sheens and how much oil is supplying them so we could define the magnitude of the problem,” said WHOI chemist Chris Reddy. Continue reading
Filed under: BP Gulf oil spill, Environment, gas drilling, oil drilling | Tagged: Deepwater Horizon disaster, Gulf of Mexico, National Science Foundation, oil spills, University of California Santa Barbara, Woods Hole Oceanographic Institution | Leave a comment »
Posted on July 12, 2013 by Bob Berwyn
Wider ecosystem services must be considered in damage assessments
BP oil from the Deepwater Horizon drill rig spreads across the northern Gulf of Mexico.
By Summit Voice
FRISCO — The total impacts of the Deepwater Horizon oil disaster in the Gulf of Mexico can’t be quantified without accounting for how the spill affected ecosystem services provided by the Gulf. That includes trying to quantify the cost of increased storm damage due to wetlands losses, according to a new report from the National Research Council.
But a lack of baseline data about ecological conditions, as well as an incomplete understanding of complex ecosystem interactions make establishing the full scope of damage difficult.
Capturing the entire range of impacts will also require more data on human and economic factors. The report emphasizes that many services may have enormous value despite being difficult to measure, and that such services should be given adequate consideration in evaluating restoration options. Continue reading
Filed under: BP Gulf oil spill, Environment, gas drilling, Marine biology, ocean conservation, oil drilling | Tagged: Deepwater horizon oil spill, ecosystem services, Environment, Gulf of Mexico, offshore oil drilling | Leave a comment »
Posted on May 5, 2013 by Bob Berwyn
UC Davis scientist Andrew Whitehead collects fish at a field site in May 2010, weeks after the April Deepwater Horizon oil spill. A 2013 study he co-authored shows killifish at oil-impacted sites continue to develop health defects, three years after the spill. Photo courtesy Pat Sullivan.
Fish embryos exposed to oil show developmental abnormalities
By Bob Berwyn
FRISCO —Small fish living in coastal Louisiana waters were sickened by crude oil toxicity for more than a year after the Deepwater Horizon oil spill in the Gulf of Mexico, according to researchers from Lousiana, California and South Carolina.
Oil collected from the spill in 2011 continues to show toxic effects in the lab, suggesting there’s a risk of multi-generational exposure, according to Andrew Whitehead, a University of California, Davis, scientist who co-authored the study of killifish, considered an indicator species for coastal ecosystems.
Killifish embryos exposed to sediments from oiled locations in 2010 and 2011 show developmental abnormalities, including heart defects, delayed hatching and reduced hatching success. Continue reading
Filed under: BP Gulf oil spill, Environment | Tagged: Deepwater horizon oil spill, Environment, Gulf of Mexico, killifish, oil pollution | 2 Comments »
Posted on April 9, 2013 by Bob Berwyn
Research suggests role of bacteria has been underestimated
Some of oil from the Deepwater Horizon oil disaster coated and killed deep-sea corals in the Gulf of Mexico, but a large quantity may have been consumed by oil-eating bacteria. Photo courtesy Lophelia II 2010, NOAA OER and BOEMR.
By Summit Voice
FRISCO — Nearly three years after the Deepwater Horizon drill rig exploded and the busted Macondo Well spewed millions of gallons of crude into the Gulf of Mexico, scientists are still trying to figure out to what happened to all the oil.
Only a tiny amount was captured or burned at the surface, and vast quantity — nobody knows exactly how much — was “dispersed” with chemicals injected directly into the stream of oil streaming out of the broken pipes, but a surprisingly large percentage of the oil may have been broken down by microbes. Continue reading
Filed under: BP Gulf oil spill, Environment, Marine biology, ocean conservation, oil drilling | Tagged: Deepwater Horizon, Gulf of Mexico, Oak Ridge National Laboratory, Oil spill, oil-eating bacteria | Leave a comment »
Posted on March 17, 2013 by Bob Berwyn
A NASA satellite image shows the widespread sheen of oil spreading across the Gulf of Mexico after the April 2010 failure of the Deepwater Horizon drilling operation.
Researchers try to trace fate of BP oil in the Gulf of Mexico
By Summit Voice
FRISCO—It’s been nearly three years since BP’s failed Deepwater Horizon drilling operation spewed millions of gallons of crude oil into the Gulf of Mexico, but scientists are still looking for signs of long-term impacts and trying to understand how the oil affected Gulf ecosystems.
One of the biggest questions remaining is exactly what happened to all the oil — about 5 million barrels. Along with a tiny percentage that was physically cleaned up, most studies suggest that much of the oil was processed by bacteria, or simply broken down into constituent molecules, but none of the studies have been able to account for the entire amount. Continue reading
Filed under: BP Gulf oil spill, energy, Environment, oil drilling | Tagged: Deepwater horizon oil spill, Environment, Florida State University, Gulf of Mexico | Leave a comment »