EnglishCancella i cookie per ripristinare le impostazioni di lingua associate al browser in uso
Titolo/Abstract/Parole chiave

Conservation genetics of the yellow-bellied toad (Bombina variegata) and the common lizard (Zootoca vivipara) in the Italian Alps

Cornetti, Luca (2014) Conservation genetics of the yellow-bellied toad (Bombina variegata) and the common lizard (Zootoca vivipara) in the Italian Alps. Tesi di Dottorato , Università degli Studi di Ferrara.

[img]
Anteprima
File PDF
tesi dottorato Luca Cornetti.pdf

Download (5MB) | Anteprima

    Abstract

    Global change is heavily affecting Alpine ecosystems in term of both climate warming and anthropization and its effects have been already demonstrated for many different taxa. However, understanding the genetic consequences on wild species caused by environmental modifications is complicated. In this thesis, I analyzed the genetic variation pattern in two vertebrate species whose distribution and persistence across the Italian Alps could be, or already have been, affected by changing climatic conditions and human pressures for assessing their conservation status. I collected semi-invasive samples of the yellow-bellied toad Bombina variegata and of the common lizard Zootoca vivipara in the central-eastern part of Alpine chain for performing molecular analyses and subsequent statistical inferences. Different types of genetic data were used for different aims, such as mitochondrial and nuclear sequences for confirming the ESU status of a threatened lineage, microsatellite markers for evaluating genetic variability and demographic histories of wild populations or genomic SNPs for studying a major evolutionary phenotypic transition. The analyses suggested that some of the studied populations of both species suffer from reduced genetic variability and low effective population size, even if this pattern is not directly ascribable to recent anthopogenic and climatic changes. In the light of these results, however, specific conservation measure should be evaluated for these species, which are considered of least concern by the IUCN, in particular considering the predicted increase of temperature and expected modifications for their most suitable habitats.

    Tipologia del documento:Tesi di Dottorato (Tesi di Dottorato)
    Data:28 Febbraio 2014
    Relatore:Bertorelle, Giorgio - Vernesi, Cristiano
    Coordinatore ciclo:Barbujani, Guido
    Istituzione:Università degli Studi di Ferrara
    Dottorato:XXV Anno 2010 > BIOLOGIA EVOLUZIONISTICA E AMBIENTALE
    Struttura:Dipartimento > Scienze della vita e biotecnologie
    Soggetti:Area 05 - Scienze biologiche > BIO/18 Genetica
    Parole chiave:global change, conservation genetics, yellow-bellied toad, common lizard, Alps
    Depositato il:02 Lug 2015 12:55

    Staff:

    Accesso riservatoAccesso riservato