Shoreline Ecology Program for Prince William Sound, Alaska, Following the

2009 ◽  
pp. 398-398-46 ◽  
Author(s):  
ES Gilfillan ◽  
DS Page ◽  
EJ Harner ◽  
PD Boehm
Keyword(s):  
Prince William Sound ◽  
Ecology Program

Shoreline Ecology Program for Prince William Sound, Alaska, Following the

2009 ◽  
pp. 347-347-51 ◽  
Author(s):  
PD Boehm ◽  
DS Page ◽  
ES Gilfillan ◽  
WA Stubblefield ◽  
EJ Harner
Keyword(s):  
Prince William Sound ◽  
Ecology Program

1998 Shoreline Conditions in the Exxon Valdez Oil Spill Zone in Prince William Sound

1999 ◽  
Vol 1999 (1) ◽  
pp. 119-126 ◽  
Author(s):  
David S. Page ◽  
Edward S. Gilfillan ◽  
Sam W. Stoker ◽  
Jerry M. Neff ◽  
Paul D. Boehm ◽  
...  
Keyword(s):  
Oil Spill ◽  
Petroleum Hydrocarbons ◽  
Sediment Toxicity ◽  
Prince William Sound ◽  
Exxon Valdez ◽  
Tidal Zone ◽  
Worst Case ◽  
Polycyclic Aromatic ◽  
Random Manner ◽  
Ecology Program

ABSTRACT After the March 24, 1989 grounding of the Exxon Valdez and the release of 258,000 barrels of Alaska North Slope (ANS) crude oil into the marine environment of Prince William Sound (PWS), Alaska, a number of scientific studies were conducted from 1989 to 1998 to assess the fate and effects of the spill. These included the 1990–1991 shoreline ecology program (SEP), which detected little measurable impact of the spill, except at certain heavily oiled sites. In 1998, these 1990 and 1991 studies were updated. The 1998 study found spill small remnants from originally heavily oiled sites represent a minute fraction of the total PWS shoreline area. Any isolated deposits of remaining oil residues from the spill generally were found at the top of the tidal zone and highly weathered and therefore in a form and location unavailable and non-toxic to biota. Between 1991 and 1998, the concentrations of petroleum hydrocarbons at the “worst case” sites studied decreased dramatically. The polycyclic aromatic hydrocarbon (PAH) concentrations measured at these sites in 1998 were at least three times lower than the effects range-low (ER-L) sediment toxicity threshold values of 4,022 ng/g for total PAH. Mussels sampled at heavily oiled “worst case” sites in 1998 also had dramatically lower tissue PAH concentrations compared with samples taken in 1993, indicating low bioavailability of any hydrocarbons present and thus low risk to biota. Natural interannual variability in the structure of the biological infaunal communities is the largest, most consistent signal observed in this study, not any residual oil spill effects. The results of statistical analyses of the data (ANCOVA) indicated no continuing oiling effects in 1998. Consistent differences were observed between oiled and unoiled reference sites, but they were significant in only one analysis. These differences were unrelated to differences in the total PAH present among sites. Any observed differences are more likely related to the fact these “worst case” oiled sites were not selected in an unbiased, random manner.

U.S. Army Coastal Engineering Research Center's Ecology Program

1984 ◽  
Vol 16 (3-4) ◽  
pp. 525-532
Author(s):  
E J Pullen ◽  
P L Knutson ◽  
A K Hurme
Keyword(s):  
Coastal Engineering ◽  
Coastal Vegetation ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Engineering Research ◽  
Navigation Channel ◽  
Biological Environment ◽  
Ecology Program ◽  
The U.S ◽  
Shore Erosion

The Coastal Engineering Research Center at Fort Belvoir, Virginia, is responsible for research that supports the U.S. Army Corps of Engineers' Civil Works program. This research involves coastal navigation, channel design and maintenance, storm flooding, shore erosion control, and coastal ecology. The ecology research is focused on two major areas: (1) use of coastal vegetation for engineering purposes and (2) effects of coastal engineering activities on the biological environment. The objectives and accomplishments of the ecology research are discussed and specific examples of field guidance are presented.

PROVENANCE OF SANDSTONE CLASTS FROM CONGLOMERATE OF THE PALEOCENE-EOCENE ORCA GROUP IN PRINCE WILLIAM SOUND, ALASKA

2019 ◽  
Author(s):  
Mollie D. Pope ◽  
◽  
Will S. Fisher ◽  
Alysala M. Malik ◽  
John I. Garver ◽  
...  
Keyword(s):  
Prince William Sound

scholarly journals An empirical Bayesian approach to incorporate directional movement information from a forage fish into the Arnason-Schwarz mark-recapture model

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Mary A. Bishop ◽  
Jordan W. Bernard
Keyword(s):  
Bayesian Approach ◽  
Gulf Of Alaska ◽  
Forage Fish ◽  
Pacific Herring ◽  
Prince William Sound ◽  
Modeling Framework ◽  
Empirical Bayesian ◽  
Directional Information ◽  
Directional Movement ◽  
Empirical Bayesian Approach

Abstract Background Over the past two decades, various species of forage fish have been successfully implanted with miniaturized acoustic transmitters and subsequently monitored using stationary acoustic receivers. When acoustic receivers are configured in an array, information related to fish direction can potentially be determined, depending upon the number and relative orientation of the acoustic receivers. However, it can be difficult to incorporate directional information into frequentist mark-recapture methods. Here we show how an empirical Bayesian approach can be used to develop a model that incorporates directional movement information into the Arnason-Schwarz modeling framework to describe survival and migration patterns of a Pacific herring (Clupea pallasii) population in coastal Alaska, USA. Methods We acoustic-tagged 326 adult Pacific herring during April 2017 and 2018 while on their spawning grounds in Prince William Sound Alaska, USA. To monitor their movements, stationary acoustic receivers were deployed at strategic locations throughout the Sound. Receivers located at the major entrances to the Gulf of Alaska were arranged in parallel arrays to determine the directional movements of the fish. Informative priors were used to incorporate the directional information recorded at the entrance arrays into the model. Results A seasonal migratory pattern was found at one of Prince William Sound’s major entrances to the Gulf of Alaska. At this entrance, fish tended to enter the Gulf of Alaska during spring and summer after spawning and return to Prince William Sound during the fall and winter. Fish mortality was higher during spring and summer than fall and winter in both Prince William Sound and the Gulf of Alaska. Conclusions An empirical Bayesian modeling approach can be used to extend the Arnason-Schwarz modeling framework to incorporate directional information from acoustic arrays to estimate survival and characterize the timing and direction of migratory movements of forage fish.

scholarly journals Megathrust splay faults at the focus of the Prince William Sound asperity, Alaska

2013 ◽  
Vol 118 (10) ◽  
pp. 5428-5441 ◽  
Author(s):  
Lee M. Liberty ◽  
Shaun P. Finn ◽  
Peter J. Haeussler ◽  
Thomas L. Pratt ◽  
Andrew Peterson
Keyword(s):  
Prince William Sound ◽  
Splay Faults
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