Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population
Abstract Background Knowledge of immigration and emigration rates is crucial for understanding of population dynamics, yet little is known about these vital rates, especially for arctic songbirds. We estimated immigration in an Arctic population of northern wheatears on Baffin Island, Canada, by the...
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ftbiomed:oai:biomedcentral.com:s40462-016-0081-x 2023-05-15T14:56:56+02:00 Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population Bairlein, Franz Norris, D. Voigt, Christian Dunn, Erica Hussell, David 2016-06-15 http://www.movementecologyjournal.com/content/4/1/16 en eng BioMed Central Ltd. http://www.movementecologyjournal.com/content/4/1/16 Copyright 2016 Bairlein et al. Immigration Dispersal Stable isotopes Northern wheatear Oenanthe oenanthe Research 2016 ftbiomed 2016-06-18T23:59:57Z Abstract Background Knowledge of immigration and emigration rates is crucial for understanding of population dynamics, yet little is known about these vital rates, especially for arctic songbirds. We estimated immigration in an Arctic population of northern wheatears on Baffin Island, Canada, by the use of stable hydrogen isotopes in tail feathers (δ 2 H K ). We assumed that δ 2 H K values of juvenile (hatch-year) feathers grown at the breeding grounds were representative of the local population, while those of breeding adults were indicative of where they grew their feathers during their post-breeding molt the previous year. The extent to which adult isotope values differ from those of juveniles provides an estimate of the minimum level of immigration into the breeding population. Results Mean δ 2 H K values did not differ in juvenile birds between years. Breeding adult birds did not differ significantly in mean δ 2 H K values compared to juveniles but did differ in their respective standard deviations, reflecting a significantly wider range of isotopic signatures in adults than in juveniles. Thirty-eight percent of the δ 2 H K values in adults were greater ± 2 SD of the mean δ 2 H K values of juveniles, suggesting that at least 38 % of the breeding adults were of non-local origin, thus immigrants from elsewhere. Conclusions Although the use of stable isotopes has limitations, the use of stable-hydrogen isotopic markers has the potential to contribute valuable information towards understanding immigration rates in bird populations. In our study, hydrogen isotope measurements of the feathers of northern wheatears indicated a high rate of immigration into the breeding population, which is consistent with low return rates of banded breeding adults as well as implying high emigration rates of local breeders. Other/Unknown Material Arctic Arctic Population Baffin Island Baffin BioMed Central Arctic Baffin Island Canada |
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English |
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Immigration Dispersal Stable isotopes Northern wheatear Oenanthe oenanthe |
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Immigration Dispersal Stable isotopes Northern wheatear Oenanthe oenanthe Bairlein, Franz Norris, D. Voigt, Christian Dunn, Erica Hussell, David Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
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Immigration Dispersal Stable isotopes Northern wheatear Oenanthe oenanthe |
description |
Abstract Background Knowledge of immigration and emigration rates is crucial for understanding of population dynamics, yet little is known about these vital rates, especially for arctic songbirds. We estimated immigration in an Arctic population of northern wheatears on Baffin Island, Canada, by the use of stable hydrogen isotopes in tail feathers (δ 2 H K ). We assumed that δ 2 H K values of juvenile (hatch-year) feathers grown at the breeding grounds were representative of the local population, while those of breeding adults were indicative of where they grew their feathers during their post-breeding molt the previous year. The extent to which adult isotope values differ from those of juveniles provides an estimate of the minimum level of immigration into the breeding population. Results Mean δ 2 H K values did not differ in juvenile birds between years. Breeding adult birds did not differ significantly in mean δ 2 H K values compared to juveniles but did differ in their respective standard deviations, reflecting a significantly wider range of isotopic signatures in adults than in juveniles. Thirty-eight percent of the δ 2 H K values in adults were greater ± 2 SD of the mean δ 2 H K values of juveniles, suggesting that at least 38 % of the breeding adults were of non-local origin, thus immigrants from elsewhere. Conclusions Although the use of stable isotopes has limitations, the use of stable-hydrogen isotopic markers has the potential to contribute valuable information towards understanding immigration rates in bird populations. In our study, hydrogen isotope measurements of the feathers of northern wheatears indicated a high rate of immigration into the breeding population, which is consistent with low return rates of banded breeding adults as well as implying high emigration rates of local breeders. |
format |
Other/Unknown Material |
author |
Bairlein, Franz Norris, D. Voigt, Christian Dunn, Erica Hussell, David |
author_facet |
Bairlein, Franz Norris, D. Voigt, Christian Dunn, Erica Hussell, David |
author_sort |
Bairlein, Franz |
title |
Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
title_short |
Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
title_full |
Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
title_fullStr |
Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
title_full_unstemmed |
Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population |
title_sort |
using stable-hydrogen isotopes to reveal immigration in an arctic-breeding songbird population |
publisher |
BioMed Central Ltd. |
publishDate |
2016 |
url |
http://www.movementecologyjournal.com/content/4/1/16 |
geographic |
Arctic Baffin Island Canada |
geographic_facet |
Arctic Baffin Island Canada |
genre |
Arctic Arctic Population Baffin Island Baffin |
genre_facet |
Arctic Arctic Population Baffin Island Baffin |
op_relation |
http://www.movementecologyjournal.com/content/4/1/16 |
op_rights |
Copyright 2016 Bairlein et al. |
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1766328996634558464 |