Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska
The Exxon Valdez oil spill occurred in March 1989 in Prince William Sound, Alaska, and was one of the worst environmental disasters on record in the United States. Despite long-term data collection over the nearly three decades since the spill, tremendous uncertainty remains as to how significantly...
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ftpubmed:oai:pubmedcentral.nih.gov:5351843 2023-05-15T17:59:38+02:00 Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska Ward, Eric J. Adkison, Milo Couture, Jessica Dressel, Sherri C. Litzow, Michael A. Moffitt, Steve Hoem Neher, Tammy Trochta, John Brenner, Rich 2017-03-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5351843/ http://www.ncbi.nlm.nih.gov/pubmed/28296895 https://doi.org/10.1371/journal.pone.0172898 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5351843/ http://www.ncbi.nlm.nih.gov/pubmed/28296895 http://dx.doi.org/10.1371/journal.pone.0172898 https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. CC0 PDM Research Article Text 2017 ftpubmed https://doi.org/10.1371/journal.pone.0172898 2017-04-09T00:02:05Z The Exxon Valdez oil spill occurred in March 1989 in Prince William Sound, Alaska, and was one of the worst environmental disasters on record in the United States. Despite long-term data collection over the nearly three decades since the spill, tremendous uncertainty remains as to how significantly the spill affected fishery resources. Pacific herring (Clupea pallasii) and some wild Pacific salmon populations (Oncorhynchus spp.) in Prince William Sound declined in the early 1990s, and have not returned to the population sizes observed in the 1980s. Discerning if, or how much of, this decline resulted from the oil spill has been difficult because a number of other physical and ecological drivers are confounded temporally with the spill; some of these drivers include environmental variability or changing climate regimes, increased production of hatchery salmon in the region, and increases in populations of potential predators. Using data pre- and post-spill, we applied time-series methods to evaluate support for whether and how herring and salmon productivity has been affected by each of five drivers: (1) density dependence, (2) the EVOS event, (3) changing environmental conditions, (4) interspecific competition on juvenile fish, and (5) predation and competition from adult fish or, in the case of herring, humpback whales. Our results showed support for intraspecific density-dependent effects in herring, sockeye, and Chinook salmon, with little overall support for an oil spill effect. Of the salmon species, the largest driver was the negative impact of adult pink salmon returns on sockeye salmon productivity. Herring productivity was most strongly affected by changing environmental conditions; specifically, freshwater discharge into the Gulf of Alaska was linked to a series of recruitment failures—before, during, and after EVOS. These results highlight the need to better understand long terms impacts of pink salmon on food webs, as well as the interactions between nearshore species and freshwater inputs, ... Text Pink salmon Alaska PubMed Central (PMC) Gulf of Alaska Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) PLOS ONE 12 3 e0172898 |
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English |
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Research Article |
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Research Article Ward, Eric J. Adkison, Milo Couture, Jessica Dressel, Sherri C. Litzow, Michael A. Moffitt, Steve Hoem Neher, Tammy Trochta, John Brenner, Rich Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
topic_facet |
Research Article |
description |
The Exxon Valdez oil spill occurred in March 1989 in Prince William Sound, Alaska, and was one of the worst environmental disasters on record in the United States. Despite long-term data collection over the nearly three decades since the spill, tremendous uncertainty remains as to how significantly the spill affected fishery resources. Pacific herring (Clupea pallasii) and some wild Pacific salmon populations (Oncorhynchus spp.) in Prince William Sound declined in the early 1990s, and have not returned to the population sizes observed in the 1980s. Discerning if, or how much of, this decline resulted from the oil spill has been difficult because a number of other physical and ecological drivers are confounded temporally with the spill; some of these drivers include environmental variability or changing climate regimes, increased production of hatchery salmon in the region, and increases in populations of potential predators. Using data pre- and post-spill, we applied time-series methods to evaluate support for whether and how herring and salmon productivity has been affected by each of five drivers: (1) density dependence, (2) the EVOS event, (3) changing environmental conditions, (4) interspecific competition on juvenile fish, and (5) predation and competition from adult fish or, in the case of herring, humpback whales. Our results showed support for intraspecific density-dependent effects in herring, sockeye, and Chinook salmon, with little overall support for an oil spill effect. Of the salmon species, the largest driver was the negative impact of adult pink salmon returns on sockeye salmon productivity. Herring productivity was most strongly affected by changing environmental conditions; specifically, freshwater discharge into the Gulf of Alaska was linked to a series of recruitment failures—before, during, and after EVOS. These results highlight the need to better understand long terms impacts of pink salmon on food webs, as well as the interactions between nearshore species and freshwater inputs, ... |
format |
Text |
author |
Ward, Eric J. Adkison, Milo Couture, Jessica Dressel, Sherri C. Litzow, Michael A. Moffitt, Steve Hoem Neher, Tammy Trochta, John Brenner, Rich |
author_facet |
Ward, Eric J. Adkison, Milo Couture, Jessica Dressel, Sherri C. Litzow, Michael A. Moffitt, Steve Hoem Neher, Tammy Trochta, John Brenner, Rich |
author_sort |
Ward, Eric J. |
title |
Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
title_short |
Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
title_full |
Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
title_fullStr |
Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
title_full_unstemmed |
Evaluating signals of oil spill impacts, climate, and species interactions in Pacific herring and Pacific salmon populations in Prince William Sound and Copper River, Alaska |
title_sort |
evaluating signals of oil spill impacts, climate, and species interactions in pacific herring and pacific salmon populations in prince william sound and copper river, alaska |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5351843/ http://www.ncbi.nlm.nih.gov/pubmed/28296895 https://doi.org/10.1371/journal.pone.0172898 |
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ENVELOPE(-130.143,-130.143,54.160,54.160) |
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Gulf of Alaska Pacific Sockeye |
geographic_facet |
Gulf of Alaska Pacific Sockeye |
genre |
Pink salmon Alaska |
genre_facet |
Pink salmon Alaska |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5351843/ http://www.ncbi.nlm.nih.gov/pubmed/28296895 http://dx.doi.org/10.1371/journal.pone.0172898 |
op_rights |
https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. |
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CC0 PDM |
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https://doi.org/10.1371/journal.pone.0172898 |
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PLOS ONE |
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12 |
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e0172898 |
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