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Coast to coast: High genomic connectivity in North American scoters
Dispersal shapes demographic processes and therefore is fundamental to understanding biological, ecological, and evolutionary processes acting within populations. However, assessing population connectivity in scoters (Melanitta sp.) is challenging as these species have large spatial distributions th...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662410/ https://www.ncbi.nlm.nih.gov/pubmed/31380047 http://dx.doi.org/10.1002/ece3.5297 |
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author | Sonsthagen, Sarah A. Wilson, Robert E. Lavretsky, Philip Talbot, Sandra L. |
author_facet | Sonsthagen, Sarah A. Wilson, Robert E. Lavretsky, Philip Talbot, Sandra L. |
author_sort | Sonsthagen, Sarah A. |
collection | PubMed |
description | Dispersal shapes demographic processes and therefore is fundamental to understanding biological, ecological, and evolutionary processes acting within populations. However, assessing population connectivity in scoters (Melanitta sp.) is challenging as these species have large spatial distributions that span remote landscapes, have varying nesting distributions (disjunct vs. continuous), exhibit unknown levels of dispersal, and vary in the timing of the formation of pair bonds (winter vs. fall/spring migration) that may influence the distribution of genetic diversity. Here, we used double‐digest restriction‐associated DNA sequence (ddRAD) and microsatellite genotype data to assess population structure within the three North American species of scoter (black scoter, M. americana; white‐winged scoter, M. deglandi; surf scoter, M. perspicillata), and between their European congeners (common scoter, M. nigra; velvet scoter, M. fusca). We uncovered no or weak genomic structure (ddRAD Φ (ST) < 0.019; microsatellite F (ST) < 0.004) within North America but high levels of structure among European congeners (ddRAD Φ (ST) > 0.155, microsatellite F (ST) > 0.086). The pattern of limited genomic structure within North America is shared with other sea duck species and is often attributed to male‐biased dispersal. Further, migratory tendencies (east vs. west) of female surf and white‐winged scoters in central Canada are known to vary across years, providing additional opportunities for intracontinental dispersal and a mechanism for the maintenance of genomic connectivity across North America. In contrast, the black scoter had relatively elevated levels of divergence between Alaska and Atlantic sites and a second genetic cluster found in Alaska at ddRAD loci was concordant with its disjunct breeding distribution suggestive of a dispersal barrier (behavioral or physical). Although scoter populations appear to be connected through a dispersal network, a small percentage (<4%) of ddRAD loci had elevated divergence which may be useful in linking areas (nesting, molting, staging, and wintering) throughout the annual cycle. |
format | Online Article Text |
id | pubmed-6662410 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-66624102019-08-02 Coast to coast: High genomic connectivity in North American scoters Sonsthagen, Sarah A. Wilson, Robert E. Lavretsky, Philip Talbot, Sandra L. Ecol Evol Original Research Dispersal shapes demographic processes and therefore is fundamental to understanding biological, ecological, and evolutionary processes acting within populations. However, assessing population connectivity in scoters (Melanitta sp.) is challenging as these species have large spatial distributions that span remote landscapes, have varying nesting distributions (disjunct vs. continuous), exhibit unknown levels of dispersal, and vary in the timing of the formation of pair bonds (winter vs. fall/spring migration) that may influence the distribution of genetic diversity. Here, we used double‐digest restriction‐associated DNA sequence (ddRAD) and microsatellite genotype data to assess population structure within the three North American species of scoter (black scoter, M. americana; white‐winged scoter, M. deglandi; surf scoter, M. perspicillata), and between their European congeners (common scoter, M. nigra; velvet scoter, M. fusca). We uncovered no or weak genomic structure (ddRAD Φ (ST) < 0.019; microsatellite F (ST) < 0.004) within North America but high levels of structure among European congeners (ddRAD Φ (ST) > 0.155, microsatellite F (ST) > 0.086). The pattern of limited genomic structure within North America is shared with other sea duck species and is often attributed to male‐biased dispersal. Further, migratory tendencies (east vs. west) of female surf and white‐winged scoters in central Canada are known to vary across years, providing additional opportunities for intracontinental dispersal and a mechanism for the maintenance of genomic connectivity across North America. In contrast, the black scoter had relatively elevated levels of divergence between Alaska and Atlantic sites and a second genetic cluster found in Alaska at ddRAD loci was concordant with its disjunct breeding distribution suggestive of a dispersal barrier (behavioral or physical). Although scoter populations appear to be connected through a dispersal network, a small percentage (<4%) of ddRAD loci had elevated divergence which may be useful in linking areas (nesting, molting, staging, and wintering) throughout the annual cycle. John Wiley and Sons Inc. 2019-06-03 /pmc/articles/PMC6662410/ /pubmed/31380047 http://dx.doi.org/10.1002/ece3.5297 Text en Published 2019. This article is a U.S. Government work and is in the public domain in the USA. Ecology and Evolution published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Sonsthagen, Sarah A. Wilson, Robert E. Lavretsky, Philip Talbot, Sandra L. Coast to coast: High genomic connectivity in North American scoters |
title | Coast to coast: High genomic connectivity in North American scoters |
title_full | Coast to coast: High genomic connectivity in North American scoters |
title_fullStr | Coast to coast: High genomic connectivity in North American scoters |
title_full_unstemmed | Coast to coast: High genomic connectivity in North American scoters |
title_short | Coast to coast: High genomic connectivity in North American scoters |
title_sort | coast to coast: high genomic connectivity in north american scoters |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662410/ https://www.ncbi.nlm.nih.gov/pubmed/31380047 http://dx.doi.org/10.1002/ece3.5297 |
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