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Connectivity in a pond system influences migration and genetic structure in threespine stickleback

Neutral genetic structure of natural populations is primarily influenced by migration (the movement of individuals and, subsequently, their genes) and drift (the statistical chance of losing genetic diversity over time). Migration between populations is influenced by several factors, including indiv...

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Autores principales: Seymour, Mathew, Räsänen, Katja, Holderegger, Rolf, Kristjánsson, Bjarni K
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3605840/
https://www.ncbi.nlm.nih.gov/pubmed/23531709
http://dx.doi.org/10.1002/ece3.476
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author Seymour, Mathew
Räsänen, Katja
Holderegger, Rolf
Kristjánsson, Bjarni K
author_facet Seymour, Mathew
Räsänen, Katja
Holderegger, Rolf
Kristjánsson, Bjarni K
author_sort Seymour, Mathew
collection PubMed
description Neutral genetic structure of natural populations is primarily influenced by migration (the movement of individuals and, subsequently, their genes) and drift (the statistical chance of losing genetic diversity over time). Migration between populations is influenced by several factors, including individual behavior, physical barriers, and environmental heterogeneity among populations. However, drift is expected to be stronger in populations with low immigration rate and small effective population size. With the technological advancement in geological information systems and spatial analysis tools, landscape genetics now allows the development of realistic migration models and increased insight to important processes influencing diversity of natural populations. In this study, we investigated the relationship between landscape connectivity and genetic distance of threespine stickleback (Gasterosteus aculeatus) inhabiting a pond complex in Belgjarskógur, Northeast Iceland. We used two landscape genetic approaches (i.e., least-cost-path and isolation-by-resistance) and asked whether gene flow, as measured by genetic distance, was more strongly associated with Euclidean distance (isolation-by-distance) or with landscape connectivity provided by areas prone to flooding (as indicated by Carex sp. cover)? We found substantial genetic structure across the study area, with pairwise genetic distances among populations (D(PS)) ranging from 0.118 to 0.488. Genetic distances among populations were more strongly correlated with least-cost-path and isolation-by-resistance than with Euclidean distance, whereas the relative contribution of isolation-by-resistance and Euclidian distance could not be disentangled. These results indicate that migration among stickleback populations occurs via periodically flooded areas. Overall, this study highlights the importance of transient landscape elements influencing migration and genetic structure of populations at small spatial scales.
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spelling pubmed-36058402013-03-25 Connectivity in a pond system influences migration and genetic structure in threespine stickleback Seymour, Mathew Räsänen, Katja Holderegger, Rolf Kristjánsson, Bjarni K Ecol Evol Original Research Neutral genetic structure of natural populations is primarily influenced by migration (the movement of individuals and, subsequently, their genes) and drift (the statistical chance of losing genetic diversity over time). Migration between populations is influenced by several factors, including individual behavior, physical barriers, and environmental heterogeneity among populations. However, drift is expected to be stronger in populations with low immigration rate and small effective population size. With the technological advancement in geological information systems and spatial analysis tools, landscape genetics now allows the development of realistic migration models and increased insight to important processes influencing diversity of natural populations. In this study, we investigated the relationship between landscape connectivity and genetic distance of threespine stickleback (Gasterosteus aculeatus) inhabiting a pond complex in Belgjarskógur, Northeast Iceland. We used two landscape genetic approaches (i.e., least-cost-path and isolation-by-resistance) and asked whether gene flow, as measured by genetic distance, was more strongly associated with Euclidean distance (isolation-by-distance) or with landscape connectivity provided by areas prone to flooding (as indicated by Carex sp. cover)? We found substantial genetic structure across the study area, with pairwise genetic distances among populations (D(PS)) ranging from 0.118 to 0.488. Genetic distances among populations were more strongly correlated with least-cost-path and isolation-by-resistance than with Euclidean distance, whereas the relative contribution of isolation-by-resistance and Euclidian distance could not be disentangled. These results indicate that migration among stickleback populations occurs via periodically flooded areas. Overall, this study highlights the importance of transient landscape elements influencing migration and genetic structure of populations at small spatial scales. Blackwell Publishing Ltd 2013-03 2013-01-18 /pmc/articles/PMC3605840/ /pubmed/23531709 http://dx.doi.org/10.1002/ece3.476 Text en © 2013 Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
spellingShingle Original Research
Seymour, Mathew
Räsänen, Katja
Holderegger, Rolf
Kristjánsson, Bjarni K
Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title_full Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title_fullStr Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title_full_unstemmed Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title_short Connectivity in a pond system influences migration and genetic structure in threespine stickleback
title_sort connectivity in a pond system influences migration and genetic structure in threespine stickleback
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3605840/
https://www.ncbi.nlm.nih.gov/pubmed/23531709
http://dx.doi.org/10.1002/ece3.476
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