Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change

Millennial and centurial changes in oceanography influence the distributions and movement patterns of fish and invertebrates. These changes, in turn, determine the availability of food resources for higher trophic levels and, hence, affect the distributions and abundances of marine birds. A century-...

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Published in:ICES Journal of Marine Science
Main Authors: Montevecchi, W. A., Myers, R. A.
Format: Text
Language:English
Published: Oxford University Press 1997
Subjects:
Online Access:http://icesjms.oxfordjournals.org/cgi/content/short/54/4/608
https://doi.org/10.1006/jmsc.1997.0265
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spelling fthighwire:oai:open-archive.highwire.org:icesjms:54/4/608 2023-05-15T17:22:25+02:00 Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change Montevecchi, W. A. Myers, R. A. 1997-08-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/54/4/608 https://doi.org/10.1006/jmsc.1997.0265 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/54/4/608 http://dx.doi.org/10.1006/jmsc.1997.0265 Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1997 fthighwire https://doi.org/10.1006/jmsc.1997.0265 2013-05-27T06:34:03Z Millennial and centurial changes in oceanography influence the distributions and movement patterns of fish and invertebrates. These changes, in turn, determine the availability of food resources for higher trophic levels and, hence, affect the distributions and abundances of marine birds. A century-long population trend of northern gannets ( Sula bassana ) is correlated with warming surface water conditions and increased mackerel ( Scomber scombrus ) availability. On a decadal scale, a major dietary change of breeding gannets from migratory warm-water pelagic fish and squids to cold-water fish is associated with cold-water perturbations in the north-west Atlantic during the 1990s. Cold-water influences appear to have inhibited migratory pelagic fish and squid from moving into the region in recent years, causing a major shift in pelagic food webs on the Newfoundland Shelf. Such findings imply that slight changes in oceanographic conditions, possibly associated with climate warming, could have large-scale and pervasive effects on seabird distributions, feeding ecology, reproductive success, and populations. Such changes might be detected initially near the limits of seabird ranges and the margins of oceanographic regions. Text Newfoundland North West Atlantic HighWire Press (Stanford University) ICES Journal of Marine Science 54 4 608 614
institution Open Polar
collection HighWire Press (Stanford University)
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language English
topic Articles
spellingShingle Articles
Montevecchi, W. A.
Myers, R. A.
Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
topic_facet Articles
description Millennial and centurial changes in oceanography influence the distributions and movement patterns of fish and invertebrates. These changes, in turn, determine the availability of food resources for higher trophic levels and, hence, affect the distributions and abundances of marine birds. A century-long population trend of northern gannets ( Sula bassana ) is correlated with warming surface water conditions and increased mackerel ( Scomber scombrus ) availability. On a decadal scale, a major dietary change of breeding gannets from migratory warm-water pelagic fish and squids to cold-water fish is associated with cold-water perturbations in the north-west Atlantic during the 1990s. Cold-water influences appear to have inhibited migratory pelagic fish and squid from moving into the region in recent years, causing a major shift in pelagic food webs on the Newfoundland Shelf. Such findings imply that slight changes in oceanographic conditions, possibly associated with climate warming, could have large-scale and pervasive effects on seabird distributions, feeding ecology, reproductive success, and populations. Such changes might be detected initially near the limits of seabird ranges and the margins of oceanographic regions.
format Text
author Montevecchi, W. A.
Myers, R. A.
author_facet Montevecchi, W. A.
Myers, R. A.
author_sort Montevecchi, W. A.
title Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
title_short Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
title_full Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
title_fullStr Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
title_full_unstemmed Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change
title_sort centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west atlantic: implications for climate change
publisher Oxford University Press
publishDate 1997
url http://icesjms.oxfordjournals.org/cgi/content/short/54/4/608
https://doi.org/10.1006/jmsc.1997.0265
genre Newfoundland
North West Atlantic
genre_facet Newfoundland
North West Atlantic
op_relation http://icesjms.oxfordjournals.org/cgi/content/short/54/4/608
http://dx.doi.org/10.1006/jmsc.1997.0265
op_rights Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
op_doi https://doi.org/10.1006/jmsc.1997.0265
container_title ICES Journal of Marine Science
container_volume 54
container_issue 4
container_start_page 608
op_container_end_page 614
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