The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species

Examining the factors that influence contemporary genetic patterns is important given the alarming rate at which natural environments are changing. In particular habitat fragmentation and climate change are expected to influence the distribution and diversity of natural populations. In this study we...

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Autores principales: Hindley, J. A., Graham, B. A., Pulgarin-R., P. C., Burg, T. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6081424/
https://www.ncbi.nlm.nih.gov/pubmed/30087363
http://dx.doi.org/10.1038/s41598-018-29982-7
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author Hindley, J. A.
Graham, B. A.
Pulgarin-R., P. C.
Burg, T. M.
author_facet Hindley, J. A.
Graham, B. A.
Pulgarin-R., P. C.
Burg, T. M.
author_sort Hindley, J. A.
collection PubMed
description Examining the factors that influence contemporary genetic patterns is important given the alarming rate at which natural environments are changing. In particular habitat fragmentation and climate change are expected to influence the distribution and diversity of natural populations. In this study we used both mitochondrial control region (mtDNA) and microsatellite data to answer the following questions about genetic diversity and divergence in mountain chickadees (Poecile gambeli) a resident bird species in western North America: (1) Do populations exhibit similar levels of genetic diversity across the range? (2) What is the genetic affinity of western populations in Oregon and Washington? (3) Do genetic patterns exhibit isolation by distance, or are genetic patterns more heavily influenced by habitat discontinuity? We tested the effects of isolation by distance and habitat distribution on genetic structure by analyzing 266 samples from 17 sites across western Canada and the United States. We found a near significant relationship between genetic diversity and latitude, however, our results indicate that overall, latitude is not a strong predictor of genetic diversity. Our analyses of populations in Oregon and Washington revealed a mismatch between patterns detected with mtDNA and microsatellite data. In particular, Washington clustered with the Coast Range/Cascades/Rocky Mountain mtDNA group, but with populations in southern Oregon/California based on microsatellite data. These results suggest the presence of a contact zone in Washington between the two mtDNA clades Coast Range/Cascades/Rocky Mountain and southern Oregon/California clades. Finally, our study revealed a greater effect of isolation by distance than isolation by habitat for both mtDNA and microsatellite data. Overall the isolation by distance signal was greater for mtDNA than microsatellite patterns. The greater signal of isolation by distance on mtDNA patterns likely reflects the strong effects of Pleistocene glaciations in shaping genetic patterns in western North America.
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spelling pubmed-60814242018-08-10 The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species Hindley, J. A. Graham, B. A. Pulgarin-R., P. C. Burg, T. M. Sci Rep Article Examining the factors that influence contemporary genetic patterns is important given the alarming rate at which natural environments are changing. In particular habitat fragmentation and climate change are expected to influence the distribution and diversity of natural populations. In this study we used both mitochondrial control region (mtDNA) and microsatellite data to answer the following questions about genetic diversity and divergence in mountain chickadees (Poecile gambeli) a resident bird species in western North America: (1) Do populations exhibit similar levels of genetic diversity across the range? (2) What is the genetic affinity of western populations in Oregon and Washington? (3) Do genetic patterns exhibit isolation by distance, or are genetic patterns more heavily influenced by habitat discontinuity? We tested the effects of isolation by distance and habitat distribution on genetic structure by analyzing 266 samples from 17 sites across western Canada and the United States. We found a near significant relationship between genetic diversity and latitude, however, our results indicate that overall, latitude is not a strong predictor of genetic diversity. Our analyses of populations in Oregon and Washington revealed a mismatch between patterns detected with mtDNA and microsatellite data. In particular, Washington clustered with the Coast Range/Cascades/Rocky Mountain mtDNA group, but with populations in southern Oregon/California based on microsatellite data. These results suggest the presence of a contact zone in Washington between the two mtDNA clades Coast Range/Cascades/Rocky Mountain and southern Oregon/California clades. Finally, our study revealed a greater effect of isolation by distance than isolation by habitat for both mtDNA and microsatellite data. Overall the isolation by distance signal was greater for mtDNA than microsatellite patterns. The greater signal of isolation by distance on mtDNA patterns likely reflects the strong effects of Pleistocene glaciations in shaping genetic patterns in western North America. Nature Publishing Group UK 2018-08-07 /pmc/articles/PMC6081424/ /pubmed/30087363 http://dx.doi.org/10.1038/s41598-018-29982-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Hindley, J. A.
Graham, B. A.
Pulgarin-R., P. C.
Burg, T. M.
The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title_full The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title_fullStr The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title_full_unstemmed The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title_short The influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
title_sort influence of latitude, geographic distance, and habitat discontinuities on genetic variation in a high latitude montane species
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6081424/
https://www.ncbi.nlm.nih.gov/pubmed/30087363
http://dx.doi.org/10.1038/s41598-018-29982-7
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