Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range

Invasive species are a major threat to global biodiversity, yet also represent large‐scale unplanned ecological and evolutionary experiments to address fundamental questions in nature. Here we analyzed both native and invasive populations of predatory northern pike (Esox lucius) to characterize land...

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Autores principales: Campbell, Matthew A., Hale, Matthew C., Jalbert, Chase S., Dunker, Kristine, Sepulveda, Adam J., López, J. Andrés, Falke, Jeffrey A., Westley, Peter A. H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286226/
https://www.ncbi.nlm.nih.gov/pubmed/37360023
http://dx.doi.org/10.1111/eva.13556
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author Campbell, Matthew A.
Hale, Matthew C.
Jalbert, Chase S.
Dunker, Kristine
Sepulveda, Adam J.
López, J. Andrés
Falke, Jeffrey A.
Westley, Peter A. H.
author_facet Campbell, Matthew A.
Hale, Matthew C.
Jalbert, Chase S.
Dunker, Kristine
Sepulveda, Adam J.
López, J. Andrés
Falke, Jeffrey A.
Westley, Peter A. H.
author_sort Campbell, Matthew A.
collection PubMed
description Invasive species are a major threat to global biodiversity, yet also represent large‐scale unplanned ecological and evolutionary experiments to address fundamental questions in nature. Here we analyzed both native and invasive populations of predatory northern pike (Esox lucius) to characterize landscape genetic variation, determine the most likely origins of introduced populations, and investigate a presumably postglacial population from Southeast Alaska of unclear provenance. Using a set of 4329 SNPs from 351 individual Alaskan northern pike representing the most widespread geographic sampling to date, our results confirm low levels of genetic diversity in native populations (average 𝝅 of 3.18 × 10(−4)) and even less in invasive populations (average 𝝅 of 2.68 × 10(−4)) consistent with bottleneck effects. Our analyses indicate that invasive northern pike likely came from multiple introductions from different native Alaskan populations and subsequently dispersed from original introduction sites. At the broadest scale, invasive populations appear to have been founded from two distinct regions of Alaska, indicative of two independent introduction events. Genetic admixture resulting from introductions from multiple source populations may have mitigated the negative effects associated with genetic bottlenecks in this species with naturally low levels of genetic diversity. Genomic signatures strongly suggest an excess of rare, population‐specific alleles, pointing to a small number of founding individuals in both native and introduced populations consistent with a species' life history of limited dispersal and gene flow. Lastly, the results strongly suggest that a small isolated population of pike, located in Southeast Alaska, is native in origin rather than stemming from a contemporary introduction event. Although theory predicts that lack of genetic variation may limit colonization success of novel environments, we detected no evidence that a lack of standing variation limited the success of this genetically depauperate apex predator.
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spelling pubmed-102862262023-06-23 Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range Campbell, Matthew A. Hale, Matthew C. Jalbert, Chase S. Dunker, Kristine Sepulveda, Adam J. López, J. Andrés Falke, Jeffrey A. Westley, Peter A. H. Evol Appl Original Articles Invasive species are a major threat to global biodiversity, yet also represent large‐scale unplanned ecological and evolutionary experiments to address fundamental questions in nature. Here we analyzed both native and invasive populations of predatory northern pike (Esox lucius) to characterize landscape genetic variation, determine the most likely origins of introduced populations, and investigate a presumably postglacial population from Southeast Alaska of unclear provenance. Using a set of 4329 SNPs from 351 individual Alaskan northern pike representing the most widespread geographic sampling to date, our results confirm low levels of genetic diversity in native populations (average 𝝅 of 3.18 × 10(−4)) and even less in invasive populations (average 𝝅 of 2.68 × 10(−4)) consistent with bottleneck effects. Our analyses indicate that invasive northern pike likely came from multiple introductions from different native Alaskan populations and subsequently dispersed from original introduction sites. At the broadest scale, invasive populations appear to have been founded from two distinct regions of Alaska, indicative of two independent introduction events. Genetic admixture resulting from introductions from multiple source populations may have mitigated the negative effects associated with genetic bottlenecks in this species with naturally low levels of genetic diversity. Genomic signatures strongly suggest an excess of rare, population‐specific alleles, pointing to a small number of founding individuals in both native and introduced populations consistent with a species' life history of limited dispersal and gene flow. Lastly, the results strongly suggest that a small isolated population of pike, located in Southeast Alaska, is native in origin rather than stemming from a contemporary introduction event. Although theory predicts that lack of genetic variation may limit colonization success of novel environments, we detected no evidence that a lack of standing variation limited the success of this genetically depauperate apex predator. John Wiley and Sons Inc. 2023-05-12 /pmc/articles/PMC10286226/ /pubmed/37360023 http://dx.doi.org/10.1111/eva.13556 Text en © 2023 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://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 Articles
Campbell, Matthew A.
Hale, Matthew C.
Jalbert, Chase S.
Dunker, Kristine
Sepulveda, Adam J.
López, J. Andrés
Falke, Jeffrey A.
Westley, Peter A. H.
Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title_full Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title_fullStr Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title_full_unstemmed Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title_short Genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced Alaskan range
title_sort genomics reveal the origins and current structure of a genetically depauperate freshwater species in its introduced alaskan range
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10286226/
https://www.ncbi.nlm.nih.gov/pubmed/37360023
http://dx.doi.org/10.1111/eva.13556
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