Navigation Links
Wildlife still exposed to Exxon Valdez oil 20 years after disaster
Date:4/14/2010

Scientists in Alaska have discovered that lingering oil from the 1989 Exxon Valdez spill is still being ingested by some wildlife more than 20 years after the disaster. The research, published in Environmental Toxicology and Chemistry, uses biomarkers to reveal long-term exposure to oil in harlequin ducks and demonstrates how consequences of oil spills are measured in decades rather than years.

The Exxon Valdez tanker ran aground on the Prince William Sound on March 24, 1989, spilling 10.8 million gallons of crude oil into the sea, covering 1,300 square miles. It is still regarded as one of the most devastating human-caused contamination events, and the effects on wildlife populations and communities have been debated by biologists, ecologists, and the oil industry ever since.

Now, using the biomarker CYP1A, which is induced upon exposure to crude oil, an international team led by Daniel Esler, from the Centre for Wildlife Ecology, Simon Fraser University, British Columbia, has measured prolonged exposure to oil in local wildlife populations.

"One of the more remarkable and unanticipated findings of recent research is the length of time over which animals were exposed to residual oil," said Esler. "Our research has shown that oil remaining in the area, particularly in inter-tidal areas, was encountered and ingested by some near-shore animals."

The team focused their research on harlequin ducks as an example of such a species. Harlequins are marine birds that live in inter-tidal and shallow sub-tidal areas. Between 1990 and 2005 there were approximately 14,500 ducks in the Prince William Sound area.

"In addition to the higher likelihood of exposure due to their habitat, harlequin ducks have a number of characteristics that makes them particularly sensitive to oil pollution," said Esler. "Their diet consists of invertebrates that live in this area and have a limited ability to metabolize residual oil. Also, harlequin ducks have a life history strategy based on high survival rates, as well as a small body size when compared to other sea ducks."

"We found CYP1A levels were unequivocally higher in areas oiled by the Exxon Valdez spill than in nearby areas, a conclusion supported by multiple samples and two independent laboratories. We believe this shows harlequin ducks continued to be exposed to residual oil from the spill through at least 2009, twenty years after the event," concluded Esler. "We believe it is important to recognize that the duration of presence of residual oil and its associated effects are not limited to a few years after spills, but for some vulnerable species may occur over decades."


'/>"/>

Contact: Ben Norman
Lifesciencenews@wiley.com
44-124-377-0375
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. National Wildlife Federation Says Outdoor Time for Kids Can Help First Lady Achieve Her “Let's Move” Goal
2. Thomas E. Mower And Karl Malone Instrumental To Success Of Sportsmen For Fish And Wildlife Organization
3. From Quebec to France: forced marriages still exist
4. Brain Damage: NFL ‘Gets It,' American Society of Anesthesiologists Still Appears ‘Asleep'
5. Seasonal Flu Vaccination Rates Still Too Low
6. NSBA 2009 Year-End Economic Report: Small Businesses Still Struggling
7. Kids Who Beat Cancer Still Face Heart Risks
8. H1N1 Vaccines Still Available in North Dallas
9. Deadly Choking Game Still Common Among Kids
10. The Help Group Honors Brian Goldner, Mary Urquhart and Max Mayer at its Teddy Bear Ball Featuring Ben Stiller and Celebrity Guests
11. Empire BlueCross BlueShield Fears Senate Health Care Reform Legislation Still Costs New Yorkers Most
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... ... March 24, 2017 , ... Texas Physical Therapy ... be found at 9618 Huebner Road. The clinic is the group’s 7th location in ... and Dr. Ali Higgins, PT, will provide care from the clinic, which opened March ...
(Date:3/24/2017)... ... March 24, 2017 , ... In ... innovative EcoQube Frame vertical micro-veggies garden on Kickstarter . Surpassing the $100,000 ... – with nearly 2,000 consumers (and counting) already backing the campaign. , ...
(Date:3/24/2017)... , ... March 24, 2017 , ... The law firm ... Plains, N.Y., is pleased to announce Westchester resident Lauren C. Enea has joined the ... for the firm, will concentrate her practice in elder law, Medicaid planning and applications, ...
(Date:3/24/2017)... ... 2017 , ... Judy Buchanan, co-owner of Serenity Natural Health ... says, “I am passionate about sharing Reiki as a holistic, complementary therapy with ... time.” , A Certified Medical Reiki™ Master trained by Raven Keys Medical Reiki™ ...
(Date:3/24/2017)... ... March 24, 2017 , ... ... inspiring stories about real people of God in congregations across the United States. ... a Presbyterian minister ordained in 1964 who has served congregations in seven states ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... Research and Markets has announced the addition of the "Global ... report to their offering. ... The global wound care market was worth $24,482.9 million in 2015 ... 2016-2022 Among the various wound care products type, the advanced ... in 2015. Among the various applications, surgical wound segment held the largest ...
(Date:3/24/2017)... SHANGHAI , March 24, 2017 /PRNewswire/ ... organization providing high-quality and cost-effective drug development ... the pharmaceutical and biotechnology industry, announced today ... ShangPharma will be consolidating the ... Organizations (CMO) under Shanghai ChemPartner. These entities ...
(Date:3/24/2017)... Research and Markets has announced the addition of the ... report to their offering. ... The Deep Learning: Drug Discovery and Diagnostics Market, 2017-2035 ... market of deep learning solutions within the healthcare domain. Primarily driven ... a novel solution to generate relevant insights from medical data. ...
Breaking Medicine Technology: