Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea)
Arctic Terns (Sterna paradisaea) are iconic seabirds of polar latitudes, whose successful reproduction is thought to depend on local food supplies near breeding colonies. We used stable isotopes of carbon and nitrogen in eggs, blood, and feathers of terns breeding in the Canadian High Arctic to comp...
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2018
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/67769 2023-05-15T14:19:24+02:00 Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) Pratte, Isabeau Boadway, Kelly A. Diamond, Antony W. Mallory, Mark L. 2018-09-17 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769/51665 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769 Copyright (c) 2018 ARCTIC ARCTIC; Vol. 71 No. 3 (2018): September: 249–363; 259–268 1923-1245 0004-0843 diet Arctic seabird winter niche overlap Arctic Tern Sterna paradisaea régime alimentaire oiseau de mer de l’Arctique hiver recoupement des niches sterne arctique Sterna paradis info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2018 ftunivcalgaryojs 2022-03-22T21:24:22Z Arctic Terns (Sterna paradisaea) are iconic seabirds of polar latitudes, whose successful reproduction is thought to depend on local food supplies near breeding colonies. We used stable isotopes of carbon and nitrogen in eggs, blood, and feathers of terns breeding in the Canadian High Arctic to compare their isotopic niche between life history stages and between two years. The isotopic niche of terns was smaller during incubation than during pre-breeding or winter. Over two breeding seasons, isotopic profiles of Arctic Terns suggested the high importance of local, exogenous nutrient supplies to form eggs (i.e., an income breeding strategy). Our results illustrate that using stable isotopes to assess the niche of a seabird population during critical periods of its annual cycle could be an essential tool in determining the influence that local forage conditions have on breeding decisions, especially for species that mostly rely on exogenous sources of nutrients and energy for egg production. La sterne arctique (Sterna paradisaea) est un oiseau de mer emblématique des latitudes polaires, dont la reproduction réussie dépendrait de l’approvisionnement en aliments à proximité des colonies de nidification. Nous avons utilisé les isotopes stables du carbone et de l’azote provenant des oeufs, du sang et des plumes des sternes se reproduisant dans l’Extrême-Arctique canadien pour comparer leur niche isotopique entre divers stades de leur cycle biologique ainsi qu’entre deux années différentes. La niche isotopique des sternes était plus petite pendant l’incubation qu’avant la reproduction ou que pendant l’hiver. Au cours des deux saisons de reproduction, les profils isotopiques des sternes arctiques ont laissé entrevoir la grande importance d’approvisionnements en nutriments locaux et exogènes pour la formation des oeufs (soit une stratégie de reproduction à approvisionnement). Nos résultats illustrent que l’utilisation des isotopes stables pour évaluer la niche de la population d’oiseaux de mer pendant les périodes critiques de leur cycle annuel pourrait constituer un outil essentiel pour déterminer l’influence qu’ont les conditions d’alimentation locales sur les décisions de reproduction, surtout pour les espèces qui dépendent de sources d’énergie et de nutriments exogènes pour la production des oeufs. Article in Journal/Newspaper Arctic Arctic Arctic tern Arctique* Sterna paradisaea Sterne arctique University of Calgary Journal Hosting Arctic ARCTIC 71 3 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
diet Arctic seabird winter niche overlap Arctic Tern Sterna paradisaea régime alimentaire oiseau de mer de l’Arctique hiver recoupement des niches sterne arctique Sterna paradis |
spellingShingle |
diet Arctic seabird winter niche overlap Arctic Tern Sterna paradisaea régime alimentaire oiseau de mer de l’Arctique hiver recoupement des niches sterne arctique Sterna paradis Pratte, Isabeau Boadway, Kelly A. Diamond, Antony W. Mallory, Mark L. Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
topic_facet |
diet Arctic seabird winter niche overlap Arctic Tern Sterna paradisaea régime alimentaire oiseau de mer de l’Arctique hiver recoupement des niches sterne arctique Sterna paradis |
description |
Arctic Terns (Sterna paradisaea) are iconic seabirds of polar latitudes, whose successful reproduction is thought to depend on local food supplies near breeding colonies. We used stable isotopes of carbon and nitrogen in eggs, blood, and feathers of terns breeding in the Canadian High Arctic to compare their isotopic niche between life history stages and between two years. The isotopic niche of terns was smaller during incubation than during pre-breeding or winter. Over two breeding seasons, isotopic profiles of Arctic Terns suggested the high importance of local, exogenous nutrient supplies to form eggs (i.e., an income breeding strategy). Our results illustrate that using stable isotopes to assess the niche of a seabird population during critical periods of its annual cycle could be an essential tool in determining the influence that local forage conditions have on breeding decisions, especially for species that mostly rely on exogenous sources of nutrients and energy for egg production. La sterne arctique (Sterna paradisaea) est un oiseau de mer emblématique des latitudes polaires, dont la reproduction réussie dépendrait de l’approvisionnement en aliments à proximité des colonies de nidification. Nous avons utilisé les isotopes stables du carbone et de l’azote provenant des oeufs, du sang et des plumes des sternes se reproduisant dans l’Extrême-Arctique canadien pour comparer leur niche isotopique entre divers stades de leur cycle biologique ainsi qu’entre deux années différentes. La niche isotopique des sternes était plus petite pendant l’incubation qu’avant la reproduction ou que pendant l’hiver. Au cours des deux saisons de reproduction, les profils isotopiques des sternes arctiques ont laissé entrevoir la grande importance d’approvisionnements en nutriments locaux et exogènes pour la formation des oeufs (soit une stratégie de reproduction à approvisionnement). Nos résultats illustrent que l’utilisation des isotopes stables pour évaluer la niche de la population d’oiseaux de mer pendant les périodes critiques de leur cycle annuel pourrait constituer un outil essentiel pour déterminer l’influence qu’ont les conditions d’alimentation locales sur les décisions de reproduction, surtout pour les espèces qui dépendent de sources d’énergie et de nutriments exogènes pour la production des oeufs. |
format |
Article in Journal/Newspaper |
author |
Pratte, Isabeau Boadway, Kelly A. Diamond, Antony W. Mallory, Mark L. |
author_facet |
Pratte, Isabeau Boadway, Kelly A. Diamond, Antony W. Mallory, Mark L. |
author_sort |
Pratte, Isabeau |
title |
Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
title_short |
Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
title_full |
Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
title_fullStr |
Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
title_full_unstemmed |
Changes in Isotopic Niches across Stages of the Annual Cycle in the Arctic Tern (Sterna paradisaea) |
title_sort |
changes in isotopic niches across stages of the annual cycle in the arctic tern (sterna paradisaea) |
publisher |
The Arctic Institute of North America |
publishDate |
2018 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Arctic tern Arctique* Sterna paradisaea Sterne arctique |
genre_facet |
Arctic Arctic Arctic tern Arctique* Sterna paradisaea Sterne arctique |
op_source |
ARCTIC; Vol. 71 No. 3 (2018): September: 249–363; 259–268 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769/51665 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/67769 |
op_rights |
Copyright (c) 2018 ARCTIC |
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ARCTIC |
container_volume |
71 |
container_issue |
3 |
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1766291223525457920 |