Posted on August 2, 2014 by Bob Berwyn
Impacts likely to persist for decades
Oil: Can’t live with it, can’t live without it.
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
Filed under: BP Gulf oil spill, energy, Environment, oil drilling | Tagged: Deepwater horizon oil spill, Environment, fossil fuels, Gulf of Mexico, PAHs | Leave a comment »
Posted on July 29, 2014 by Bob Berwyn
Coral reefs miles away from the Deepwater Horizon oil disaster were afffected by the spill.
Ecological footprint of oil spill spread farther than previously believed
FRISCO — Oil from the 2010 Deepwater Horizon oil disaster soiled seafloor corals more than 12 miles from the spill site, Penn State University researchers said after doing a detailed survey of the area.
“The footprint of the impact of the spill on coral communities is both deeper and wider than previous data indicated,” said Penn State biology professor Charles Fisher. “This study very clearly shows that multiple coral communities, up to 22 kilometers from the spill site and at depths over 1800 meters, were impacted by the spill,” Fisher said.
The oil from the spill in the Gulf of Mexico has largely dissipated, so other clues now are needed to identify marine species impacted by the spill. Fisher’s team used the current conditions at a coral community known to have been impacted by the spill in 2010 as a model “fingerprint” for gauging the spill’s impact in newly discovered coral communities. Continue reading
Filed under: BP Gulf oil spill, Environment | Tagged: deep sea corals, Deepwater Horizon oill spill, Environment, Gulf of Mexico | 1 Comment »
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 »