A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island
A comprehensive, quantitative risk assessment is presented of the toxicological risks from buried Exxon Valdez subsurface oil residues (SSOR) to a subpopulation of sea otters (Enhydra lutris) at Northern Knight Island (NKI) in Prince William Sound, Alaska, as it has been asserted that this subpopula...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.351.9296 2023-05-15T17:04:26+02:00 A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island Prince William Sound Mark A. Harwell John H. Gentile Charles B. Johnson David L. Garshelis Keith R. Parker Harwell Gentile The Pennsylvania State University CiteSeerX Archives 2009 application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.9296 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.9296 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/43/f8/Hum_Ecol_Risk_Assess_2010_Aug_23_Jul-Aug_16(4)_727-761.tar.gz text 2009 ftciteseerx 2016-01-08T00:23:39Z A comprehensive, quantitative risk assessment is presented of the toxicological risks from buried Exxon Valdez subsurface oil residues (SSOR) to a subpopulation of sea otters (Enhydra lutris) at Northern Knight Island (NKI) in Prince William Sound, Alaska, as it has been asserted that this subpopulation of sea otters may be experiencing adverse effects from the SSOR. The central questions in this study are: could the risk to NKI sea otters from exposure to polycyclic aromatic hydrocarbons (PAHs) in SSOR, as characterized in 2001–2003, result in individual health effects, and, if so, could that exposure cause subpopulation-level effects? We follow the U.S. Environmental Protection Agency (USEPA) risk paradigm by: (a) identifying potential routes of exposure to PAHs from SSOR; (b) developing a quantitative simulation model of exposures using the best available scientific information; (c) developing scenarios based on calculated probabilities of sea otter exposures to SSOR; (d) simulating exposures for 500,000 modeled sea otters and extracting the 99.9 % quantile most highly exposed individuals; and (e) comparing projected exposures to chronic toxicity reference values. Results indicate that, even under conservative assumptions in the model, maximum-exposed sea otters would not receive a dose of PAHs sufficient to cause any health effects; consequently, no plausible toxicological risk exists from SSOR to the sea otter subpopulation at NKI. Text Knight Island Alaska Unknown Knight Island ENVELOPE(-64.010,-64.010,-64.916,-64.916) |
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ftciteseerx |
language |
English |
description |
A comprehensive, quantitative risk assessment is presented of the toxicological risks from buried Exxon Valdez subsurface oil residues (SSOR) to a subpopulation of sea otters (Enhydra lutris) at Northern Knight Island (NKI) in Prince William Sound, Alaska, as it has been asserted that this subpopulation of sea otters may be experiencing adverse effects from the SSOR. The central questions in this study are: could the risk to NKI sea otters from exposure to polycyclic aromatic hydrocarbons (PAHs) in SSOR, as characterized in 2001–2003, result in individual health effects, and, if so, could that exposure cause subpopulation-level effects? We follow the U.S. Environmental Protection Agency (USEPA) risk paradigm by: (a) identifying potential routes of exposure to PAHs from SSOR; (b) developing a quantitative simulation model of exposures using the best available scientific information; (c) developing scenarios based on calculated probabilities of sea otter exposures to SSOR; (d) simulating exposures for 500,000 modeled sea otters and extracting the 99.9 % quantile most highly exposed individuals; and (e) comparing projected exposures to chronic toxicity reference values. Results indicate that, even under conservative assumptions in the model, maximum-exposed sea otters would not receive a dose of PAHs sufficient to cause any health effects; consequently, no plausible toxicological risk exists from SSOR to the sea otter subpopulation at NKI. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Prince William Sound Mark A. Harwell John H. Gentile Charles B. Johnson David L. Garshelis Keith R. Parker Harwell Gentile |
spellingShingle |
Prince William Sound Mark A. Harwell John H. Gentile Charles B. Johnson David L. Garshelis Keith R. Parker Harwell Gentile A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
author_facet |
Prince William Sound Mark A. Harwell John H. Gentile Charles B. Johnson David L. Garshelis Keith R. Parker Harwell Gentile |
author_sort |
Prince William Sound |
title |
A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
title_short |
A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
title_full |
A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
title_fullStr |
A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
title_full_unstemmed |
A Quantitative Ecological Risk Assessment of the Toxicological Risks from Exxon Valdez Subsurface Oil Residues to Sea Otters at Northern Knight Island |
title_sort |
quantitative ecological risk assessment of the toxicological risks from exxon valdez subsurface oil residues to sea otters at northern knight island |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.9296 |
long_lat |
ENVELOPE(-64.010,-64.010,-64.916,-64.916) |
geographic |
Knight Island |
geographic_facet |
Knight Island |
genre |
Knight Island Alaska |
genre_facet |
Knight Island Alaska |
op_source |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/43/f8/Hum_Ecol_Risk_Assess_2010_Aug_23_Jul-Aug_16(4)_727-761.tar.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.9296 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766058558480187392 |