Cargando…
Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy
Mediterranean peninsulas are major biodiversity hotspots, and cold-adapted species are an important component of this biodiversity. However, cold-adapted species contributed surprisingly little to our knowledge of the intimate links between Quaternary environmental changes, species’ responses to the...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5462806/ https://www.ncbi.nlm.nih.gov/pubmed/28592856 http://dx.doi.org/10.1038/s41598-017-03116-x |
_version_ | 1783242577914363904 |
---|---|
author | Chiocchio, Andrea Bisconti, Roberta Zampiglia, Mauro Nascetti, Giuseppe Canestrelli, Daniele |
author_facet | Chiocchio, Andrea Bisconti, Roberta Zampiglia, Mauro Nascetti, Giuseppe Canestrelli, Daniele |
author_sort | Chiocchio, Andrea |
collection | PubMed |
description | Mediterranean peninsulas are major biodiversity hotspots, and cold-adapted species are an important component of this biodiversity. However, cold-adapted species contributed surprisingly little to our knowledge of the intimate links between Quaternary environmental changes, species’ responses to these changes, and current patterns of intraspecific biodiversity. Here, we investigated the genetic structure and evolutionary history of a cold-adapted amphibian, the Alpine newt Ichthyosaura alpestris, within the Italian peninsula. Nuclear and mitochondrial markers consistently identified three distinct genetic lineages, whose divergence dates to the Early Pleistocene (1.9 and 0.8 million years ago). Our results show that the Italian peninsula provided multiple Pleistocene refugia to this cold-adapted species, and suggest that allopatric fragmentation followed by secondary admixture have been key events in the formation of its current pattern of genetic diversity. Indeed, estimates of population genetic diversity clearly identified contact populations as those achieving the highest levels of diversity. Such concordance among cold-adapted and temperate species in terms of processes triggering the formation of regional patterns of genetic diversity provides strong support for the hypothesis that gene exchange between divergent lineages, rather than long-term stability of refugial populations, has been the main step toward the formation of hotspots of intraspecific biodiversity. |
format | Online Article Text |
id | pubmed-5462806 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54628062017-06-08 Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy Chiocchio, Andrea Bisconti, Roberta Zampiglia, Mauro Nascetti, Giuseppe Canestrelli, Daniele Sci Rep Article Mediterranean peninsulas are major biodiversity hotspots, and cold-adapted species are an important component of this biodiversity. However, cold-adapted species contributed surprisingly little to our knowledge of the intimate links between Quaternary environmental changes, species’ responses to these changes, and current patterns of intraspecific biodiversity. Here, we investigated the genetic structure and evolutionary history of a cold-adapted amphibian, the Alpine newt Ichthyosaura alpestris, within the Italian peninsula. Nuclear and mitochondrial markers consistently identified three distinct genetic lineages, whose divergence dates to the Early Pleistocene (1.9 and 0.8 million years ago). Our results show that the Italian peninsula provided multiple Pleistocene refugia to this cold-adapted species, and suggest that allopatric fragmentation followed by secondary admixture have been key events in the formation of its current pattern of genetic diversity. Indeed, estimates of population genetic diversity clearly identified contact populations as those achieving the highest levels of diversity. Such concordance among cold-adapted and temperate species in terms of processes triggering the formation of regional patterns of genetic diversity provides strong support for the hypothesis that gene exchange between divergent lineages, rather than long-term stability of refugial populations, has been the main step toward the formation of hotspots of intraspecific biodiversity. Nature Publishing Group UK 2017-06-07 /pmc/articles/PMC5462806/ /pubmed/28592856 http://dx.doi.org/10.1038/s41598-017-03116-x Text en © The Author(s) 2017 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 Chiocchio, Andrea Bisconti, Roberta Zampiglia, Mauro Nascetti, Giuseppe Canestrelli, Daniele Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title | Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title_full | Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title_fullStr | Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title_full_unstemmed | Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title_short | Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy |
title_sort | quaternary history, population genetic structure and diversity of the cold-adapted alpine newt ichthyosaura alpestris in peninsular italy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5462806/ https://www.ncbi.nlm.nih.gov/pubmed/28592856 http://dx.doi.org/10.1038/s41598-017-03116-x |
work_keys_str_mv | AT chiocchioandrea quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT biscontiroberta quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT zampigliamauro quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT nascettigiuseppe quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT canestrellidaniele quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly |