Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy

Abstract 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’ respons...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Andrea Chiocchio, Roberta Bisconti, Mauro Zampiglia, Giuseppe Nascetti, Daniele Canestrelli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/001896af5c0e44138ed26193bde9ff77
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:001896af5c0e44138ed26193bde9ff77
record_format	dspace
spelling	oai:doaj.org-article:001896af5c0e44138ed26193bde9ff772021-12-02T12:32:39ZQuaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy10.1038/s41598-017-03116-x2045-2322https://doaj.org/article/001896af5c0e44138ed26193bde9ff772017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03116-xhttps://doaj.org/toc/2045-2322Abstract 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.Andrea ChiocchioRoberta BiscontiMauro ZampigliaGiuseppe NascettiDaniele CanestrelliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrea Chiocchio Roberta Bisconti Mauro Zampiglia Giuseppe Nascetti Daniele Canestrelli Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy
description	Abstract 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	article
author	Andrea Chiocchio Roberta Bisconti Mauro Zampiglia Giuseppe Nascetti Daniele Canestrelli
author_facet	Andrea Chiocchio Roberta Bisconti Mauro Zampiglia Giuseppe Nascetti Daniele Canestrelli
author_sort	Andrea Chiocchio
title	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_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_sort	quaternary history, population genetic structure and diversity of the cold-adapted alpine newt ichthyosaura alpestris in peninsular italy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/001896af5c0e44138ed26193bde9ff77
work_keys_str_mv	AT andreachiocchio quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT robertabisconti quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT maurozampiglia quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT giuseppenascetti quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly AT danielecanestrelli quaternaryhistorypopulationgeneticstructureanddiversityofthecoldadaptedalpinenewtichthyosauraalpestrisinpeninsularitaly
_version_	1718393957205934080

Quaternary history, population genetic structure and diversity of the cold-adapted Alpine newt Ichthyosaura alpestris in peninsular Italy

Ejemplares similares