Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991).
We surveyed murres (Uria spp.) annually from 1989 through 1991 at breeding colonies within the trajectory of the oil to determine whether numbers had declined and to evaluate the effects of oil on nesting phenology and reproductive success, following the 1989 Exxon Valdez oil spill (EVOS). The colon...
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dataone:df35i.24.30 2024-06-03T18:46:49+00:00 Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). David Nysewander From Prince William Sound to Chignik Bay, Alaska ENVELOPE(-159.5,-150.75,60.5,55.375) BEGINDATE: 1989-01-01T00:00:00Z ENDDATE: 1991-01-01T00:00:00Z 2016-06-24T23:00:00Z https://search.dataone.org/view/df35i.24.30 unknown Gulf of Alaska Data Portal Exxon Valdez oil spill Common Murre Thick-billed Murre Uria Gulf of Alaska Middleton Island Chiswell Island The Triplets Prince William Sound Cook Inlet Barren Island Puale Bay Ugaiushak Island Semidi Island Alaska EVOS EVOSTC Exxon Valdez Oil Spill Trustee Council Kodiak Island Uria aalge Uria lomvia Dataset dataone:urn:node:GOA 2024-06-03T18:08:23Z We surveyed murres (Uria spp.) annually from 1989 through 1991 at breeding colonies within the trajectory of the oil to determine whether numbers had declined and to evaluate the effects of oil on nesting phenology and reproductive success, following the 1989 Exxon Valdez oil spill (EVOS). The colonies we surveyed contained the majority of the estimated 200,000 murres attending colonies in the affected area, and we found reduced numbers at all study colonies following the spill. In addition, nesting was delayed and productivity rates were far below normal following the spill. In contrast, numbers of murres did not decline and reproductive parameters were normal at 2 colonies we surveyed outside the trajectory. The only indication of recovery since the spill was a slight increase in reproductive success at monitored colonies in 1991. The most likely cause of reduced numbers of murres at cliffs following the oil spill was direct mortality from the oil. Since breeding murres were congregating near colonies at the time of the spill, most murres killed were probably experienced breeders. We concluded that reduced densities and skewed age structures were the most likely causes of abnormal breeding after the spill. Dataset Common Murre Kodiak thick-billed murre Uria aalge Uria lomvia Alaska uria Gulf of Alaska Data Portal (via DataONE) Gulf of Alaska Triplets ENVELOPE(-59.750,-59.750,-62.383,-62.383) The Triplets ENVELOPE(-59.750,-59.750,-62.383,-62.383) ENVELOPE(-159.5,-150.75,60.5,55.375) |
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Gulf of Alaska Data Portal (via DataONE) |
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topic |
Exxon Valdez oil spill Common Murre Thick-billed Murre Uria Gulf of Alaska Middleton Island Chiswell Island The Triplets Prince William Sound Cook Inlet Barren Island Puale Bay Ugaiushak Island Semidi Island Alaska EVOS EVOSTC Exxon Valdez Oil Spill Trustee Council Kodiak Island Uria aalge Uria lomvia |
spellingShingle |
Exxon Valdez oil spill Common Murre Thick-billed Murre Uria Gulf of Alaska Middleton Island Chiswell Island The Triplets Prince William Sound Cook Inlet Barren Island Puale Bay Ugaiushak Island Semidi Island Alaska EVOS EVOSTC Exxon Valdez Oil Spill Trustee Council Kodiak Island Uria aalge Uria lomvia David Nysewander Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
topic_facet |
Exxon Valdez oil spill Common Murre Thick-billed Murre Uria Gulf of Alaska Middleton Island Chiswell Island The Triplets Prince William Sound Cook Inlet Barren Island Puale Bay Ugaiushak Island Semidi Island Alaska EVOS EVOSTC Exxon Valdez Oil Spill Trustee Council Kodiak Island Uria aalge Uria lomvia |
description |
We surveyed murres (Uria spp.) annually from 1989 through 1991 at breeding colonies within the trajectory of the oil to determine whether numbers had declined and to evaluate the effects of oil on nesting phenology and reproductive success, following the 1989 Exxon Valdez oil spill (EVOS). The colonies we surveyed contained the majority of the estimated 200,000 murres attending colonies in the affected area, and we found reduced numbers at all study colonies following the spill. In addition, nesting was delayed and productivity rates were far below normal following the spill. In contrast, numbers of murres did not decline and reproductive parameters were normal at 2 colonies we surveyed outside the trajectory. The only indication of recovery since the spill was a slight increase in reproductive success at monitored colonies in 1991. The most likely cause of reduced numbers of murres at cliffs following the oil spill was direct mortality from the oil. Since breeding murres were congregating near colonies at the time of the spill, most murres killed were probably experienced breeders. We concluded that reduced densities and skewed age structures were the most likely causes of abnormal breeding after the spill. |
format |
Dataset |
author |
David Nysewander |
author_facet |
David Nysewander |
author_sort |
David Nysewander |
title |
Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
title_short |
Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
title_full |
Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
title_fullStr |
Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
title_full_unstemmed |
Effects of EVOS on abundances and reproduction of Murre colonies, near PWS, coastal Kenai and Alaska Peninsulas, and Kodiak Island (1989-1991). |
title_sort |
effects of evos on abundances and reproduction of murre colonies, near pws, coastal kenai and alaska peninsulas, and kodiak island (1989-1991). |
publisher |
Gulf of Alaska Data Portal |
publishDate |
|
url |
https://search.dataone.org/view/df35i.24.30 |
op_coverage |
From Prince William Sound to Chignik Bay, Alaska ENVELOPE(-159.5,-150.75,60.5,55.375) BEGINDATE: 1989-01-01T00:00:00Z ENDDATE: 1991-01-01T00:00:00Z |
long_lat |
ENVELOPE(-59.750,-59.750,-62.383,-62.383) ENVELOPE(-59.750,-59.750,-62.383,-62.383) ENVELOPE(-159.5,-150.75,60.5,55.375) |
geographic |
Gulf of Alaska Triplets The Triplets |
geographic_facet |
Gulf of Alaska Triplets The Triplets |
genre |
Common Murre Kodiak thick-billed murre Uria aalge Uria lomvia Alaska uria |
genre_facet |
Common Murre Kodiak thick-billed murre Uria aalge Uria lomvia Alaska uria |
_version_ |
1800871545852133376 |