Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001
ABSTRACT. We evaluated aerial survey data for glaucous gulls (Larus hyperboreus) in central Alaskan Beaufort Sea lagoons near the Prudhoe Bay oilfields during June to September 1978 – 2001 for trends in numbers of glaucous gulls, associations with human activity, and confounding relationships with e...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.489.5468 2023-05-15T14:19:40+02:00 Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 Lynn E. Noel Stephen R. Johnson William J. Gazey The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.489.5468 http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.489.5468 http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf text 2005 ftciteseerx 2016-01-08T08:23:06Z ABSTRACT. We evaluated aerial survey data for glaucous gulls (Larus hyperboreus) in central Alaskan Beaufort Sea lagoons near the Prudhoe Bay oilfields during June to September 1978 – 2001 for trends in numbers of glaucous gulls, associations with human activity, and confounding relationships with environmental variables. Most glaucous gulls were in barrier island and mainland shoreline habitats, and the total number of gulls per survey ranged from 50 to 1600. Seasonal variation in abundance was apparent, with the largest numbers of gulls consistently recorded during September surveys. Ice cover and wave height had a significant negative correlation with the linear density of glaucous gulls (gulls/km). There was no clear trend in abundance of gulls in the lagoons at Prudhoe Bay or obvious interaction with human activity (such as air traffic, boat traffic, or humans on land or water) in the survey area during the period of oilfield development (1978 –2001). We compiled glaucous gull nest counts from 1970 to 2001 across barrier islands to evaluate trends in the number of nests and associations with other colonial nesting species. The mean number of active glaucous gull nests increased from 1970 –74 (77.6 nests per year) to 1975 –85 (154.4 nests per year), but there was no evidence of a difference from 1970 –74 to 1987 – 2001 (153.0 nests per year). However, the change in 1976 from aerial to ground-based nest surveys confounds comparison of the survey periods before this date (1970 – 74) with those after it (1975 –85 and 1987 – 2001). A strong positive relationship between the number of glaucous gull nests and both common eider and snow goose nests suggests that common environmental variables may be regulating nesting for these species. Key words: ANCOVA, aerial monitoring surveys, multiple linear regression, nest surveys, predator-prey relationship, time trend Text Arctic Beaufort Sea Common Eider Glaucous Gull Larus hyperboreus Prudhoe Bay Unknown Barrier Island ENVELOPE(78.396,78.396,-68.431,-68.431) Barrier Islands ENVELOPE(-92.283,-92.283,62.784,62.784) |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
ABSTRACT. We evaluated aerial survey data for glaucous gulls (Larus hyperboreus) in central Alaskan Beaufort Sea lagoons near the Prudhoe Bay oilfields during June to September 1978 – 2001 for trends in numbers of glaucous gulls, associations with human activity, and confounding relationships with environmental variables. Most glaucous gulls were in barrier island and mainland shoreline habitats, and the total number of gulls per survey ranged from 50 to 1600. Seasonal variation in abundance was apparent, with the largest numbers of gulls consistently recorded during September surveys. Ice cover and wave height had a significant negative correlation with the linear density of glaucous gulls (gulls/km). There was no clear trend in abundance of gulls in the lagoons at Prudhoe Bay or obvious interaction with human activity (such as air traffic, boat traffic, or humans on land or water) in the survey area during the period of oilfield development (1978 –2001). We compiled glaucous gull nest counts from 1970 to 2001 across barrier islands to evaluate trends in the number of nests and associations with other colonial nesting species. The mean number of active glaucous gull nests increased from 1970 –74 (77.6 nests per year) to 1975 –85 (154.4 nests per year), but there was no evidence of a difference from 1970 –74 to 1987 – 2001 (153.0 nests per year). However, the change in 1976 from aerial to ground-based nest surveys confounds comparison of the survey periods before this date (1970 – 74) with those after it (1975 –85 and 1987 – 2001). A strong positive relationship between the number of glaucous gull nests and both common eider and snow goose nests suggests that common environmental variables may be regulating nesting for these species. Key words: ANCOVA, aerial monitoring surveys, multiple linear regression, nest surveys, predator-prey relationship, time trend |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Lynn E. Noel Stephen R. Johnson William J. Gazey |
spellingShingle |
Lynn E. Noel Stephen R. Johnson William J. Gazey Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
author_facet |
Lynn E. Noel Stephen R. Johnson William J. Gazey |
author_sort |
Lynn E. Noel |
title |
Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
title_short |
Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
title_full |
Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
title_fullStr |
Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
title_full_unstemmed |
Oilfield Development and Glaucous Gull (Larus hyperboreus) Distribution and Abundance in Central Alaskan Beaufort Sea Lagoons, 1970–2001 |
title_sort |
oilfield development and glaucous gull (larus hyperboreus) distribution and abundance in central alaskan beaufort sea lagoons, 1970–2001 |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.489.5468 http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf |
long_lat |
ENVELOPE(78.396,78.396,-68.431,-68.431) ENVELOPE(-92.283,-92.283,62.784,62.784) |
geographic |
Barrier Island Barrier Islands |
geographic_facet |
Barrier Island Barrier Islands |
genre |
Arctic Beaufort Sea Common Eider Glaucous Gull Larus hyperboreus Prudhoe Bay |
genre_facet |
Arctic Beaufort Sea Common Eider Glaucous Gull Larus hyperboreus Prudhoe Bay |
op_source |
http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.489.5468 http://pubs.aina.ucalgary.ca/arctic/arctic59-1-65.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291437800914944 |