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Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican

Complete panmixia across the entire range of a species is a relatively rare phenomenon; however, this pattern may be found in species that have limited philopatry and frequent dispersal. American white pelicans (Pelecanus erythrorhyncos) provide a unique opportunity to examine the role of long-dista...

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Autores principales: Reudink, Matthew W., Kyle, Christopher J., McKellar, Ann E., Somers, Christopher M., Reudink, Robyn L. F., Kyser, T. Kurt, Franks, Samantha E., Nocera, Joseph J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4790844/
https://www.ncbi.nlm.nih.gov/pubmed/26974163
http://dx.doi.org/10.1371/journal.pone.0150810
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author Reudink, Matthew W.
Kyle, Christopher J.
McKellar, Ann E.
Somers, Christopher M.
Reudink, Robyn L. F.
Kyser, T. Kurt
Franks, Samantha E.
Nocera, Joseph J.
author_facet Reudink, Matthew W.
Kyle, Christopher J.
McKellar, Ann E.
Somers, Christopher M.
Reudink, Robyn L. F.
Kyser, T. Kurt
Franks, Samantha E.
Nocera, Joseph J.
author_sort Reudink, Matthew W.
collection PubMed
description Complete panmixia across the entire range of a species is a relatively rare phenomenon; however, this pattern may be found in species that have limited philopatry and frequent dispersal. American white pelicans (Pelecanus erythrorhyncos) provide a unique opportunity to examine the role of long-distance dispersal in facilitating gene flow in a species recently reported as panmictic across its broad breeding range. This species is also undergoing a range expansion, with new colonies arising hundreds of kilometers outside previous range boundaries. In this study, we use a multiple stable isotope (δ(2)H, δ(13)C, δ(15)N) approach to examine feather isotopic structuring at 19 pelican colonies across North America, with the goal of establishing an isotopic basemap that could be used for assigning individuals at newly established breeding sites to source colonies. Within-colony isotopic variation was extremely high, exceeding 100‰ in δ(2)H within some colonies (with relatively high variation also observed for δ(13)C and δ(15)N). The high degree of within-site variation greatly limited the utility of assignment-based approaches (42% cross-validation success rate; range: 0–90% success). Furthermore, clustering algorithms identified four likely isotopic clusters; however, those clusters were generally unrelated to geographic location. Taken together, the high degree of within-site isotopic variation and lack of geographically-defined isotopic clusters preclude the establishment of an isotopic basemap for American white pelicans, but may indicate that a high incidence of long-distance dispersal is facilitating gene flow, leading to genetic panmixia.
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spelling pubmed-47908442016-03-23 Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican Reudink, Matthew W. Kyle, Christopher J. McKellar, Ann E. Somers, Christopher M. Reudink, Robyn L. F. Kyser, T. Kurt Franks, Samantha E. Nocera, Joseph J. PLoS One Research Article Complete panmixia across the entire range of a species is a relatively rare phenomenon; however, this pattern may be found in species that have limited philopatry and frequent dispersal. American white pelicans (Pelecanus erythrorhyncos) provide a unique opportunity to examine the role of long-distance dispersal in facilitating gene flow in a species recently reported as panmictic across its broad breeding range. This species is also undergoing a range expansion, with new colonies arising hundreds of kilometers outside previous range boundaries. In this study, we use a multiple stable isotope (δ(2)H, δ(13)C, δ(15)N) approach to examine feather isotopic structuring at 19 pelican colonies across North America, with the goal of establishing an isotopic basemap that could be used for assigning individuals at newly established breeding sites to source colonies. Within-colony isotopic variation was extremely high, exceeding 100‰ in δ(2)H within some colonies (with relatively high variation also observed for δ(13)C and δ(15)N). The high degree of within-site variation greatly limited the utility of assignment-based approaches (42% cross-validation success rate; range: 0–90% success). Furthermore, clustering algorithms identified four likely isotopic clusters; however, those clusters were generally unrelated to geographic location. Taken together, the high degree of within-site isotopic variation and lack of geographically-defined isotopic clusters preclude the establishment of an isotopic basemap for American white pelicans, but may indicate that a high incidence of long-distance dispersal is facilitating gene flow, leading to genetic panmixia. Public Library of Science 2016-03-14 /pmc/articles/PMC4790844/ /pubmed/26974163 http://dx.doi.org/10.1371/journal.pone.0150810 Text en © 2016 Reudink et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Reudink, Matthew W.
Kyle, Christopher J.
McKellar, Ann E.
Somers, Christopher M.
Reudink, Robyn L. F.
Kyser, T. Kurt
Franks, Samantha E.
Nocera, Joseph J.
Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title_full Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title_fullStr Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title_full_unstemmed Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title_short Linking Isotopes and Panmixia: High Within-Colony Variation in Feather δ2H, δ13C, and δ15N across the Range of the American White Pelican
title_sort linking isotopes and panmixia: high within-colony variation in feather δ2h, δ13c, and δ15n across the range of the american white pelican
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4790844/
https://www.ncbi.nlm.nih.gov/pubmed/26974163
http://dx.doi.org/10.1371/journal.pone.0150810
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