The Phylogeography of the Common Spadefoot Toad (Pelobates Fuscus), and the Role of the Po Valley As a Major Source of Genetic Variability
Molecular Ecology (2007) 16, 2734–2754 doi: 10.1111/j.1365-294X.2007.03274.x FossorialBlackwell Publishing Ltd but widespread: the phylogeography of the common spadefoot toad (Pelobates fuscus), and the role of the Po Valley as a major source of genetic variability ANGELICA CROTTINI,*† FRANCO ANDREONE,† JOACHIM KOSUCH,‡§ LEO J. BORKIN,¶ SPARTAK N. LITVINCHUK,** CHRISTOPHE EGGERT†† and MICHAEL VEITH‡,‡‡ *Universitá degli Studi di Milano, Dipartimento di Biologia, Sezione di Zoologia e Citologia, Via Celoria 26, 20133 Milano, Italy, †Museo Regionale di Scienze Naturali, Sezione di Zoologia, Via G. Giolitti, 36, 10123 Torino, Italy, ‡Universität Mainz, Institut für Zoologie, Abteilung Ökologie, Saarstraße 21, 55099 Mainz, Germany, §Universität Trier, Fachbereich VI Biogeographie, 54286 Trier, Germany, ¶Department of Herpetology, Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, 199034 St. Petersburg, Russia, **Institute of Cytology, Russian Academy of Sciences, Tikhoretsky pr. 4, 194064 St. Petersburg, Russia, ††Laboratoire d’Ecologie Alpine, CNRS UMR 5553, Université de Savoie, CISM, 73376 Le Bourget du Lac cedex, France, ‡‡Present address: Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands Abstract Pelobates fuscus is a fossorial amphibian that inhabits much of the European plain areas. To unveil traces of expansion and contraction events of the species’ range, we sequenced 702 bp of the mitochondrial cytochrome b gene. To infer the population history we applied phylo- geographical methods, such as nested clade phylogeographical analysis (NCPA), and used summary statistics to analyse population structure under a neutral model of evolution. Popula- tions were assigned to different drainage systems and we tested hypotheses of explicit refugial models using information from analysis of molecular variance, nucleotide diversity, effective population size estimation, NCPA, mismatch distribution and Bayesian dating.
[Show full text]