1725919869

Introgressive hybridization in northern range margin populations of the European fire-bellied toad (Bombina bombina) / Binia De Cahsan ; Gutachter: 1. Prof. Dr. Ralph Tiedemann (Universität Potsdam, Deutschland), 2. Prof. Dr. Jacek Szymura (Universität Jagiellonian, Kraków, Polen), 3. Prof. Dr. Sebastian Steinfartz (Universität Leipzig, Deutschland)

Tiedemann, Ralph [AkademischeR BetreuerIn] ; Szymura, Jacek [AkademischeR BetreuerIn] ; Steinfartz, Sebastian [AkademischeR BetreuerIn]

Englisch

Potsdam, 2019

Potsdam

2020

108 Seiten : Illustrationen, Diagramme, Karten

kumulative Dissertation

Dissertation, Universität Potsdam, 2020

*Dissertation / Hochschulschrift

The European fire-bellied toad (Bombina bombina) is regarded as one of the most threatened species of amphibians in central Europe and is particularly affected by environmental perturbations. During the last decades population numbers in Germany have declined drastically due to pollution, eutrophication and habitat fragmentation. Illegal translocations resulted in an introgression from southern genotypes (probably Austrian) into three local Bombina populations (Northern Germany and Southern Sweden) belonging to the northern lineage of the species. Interestingly, these populations show high frequencies of allochthonous (non-local) alleles at multiple loci and outperform the autochthonous populations in terms of their body condition. Over a time period of ten years, I could show that the Southern lineage haplo- and genotypes are still present in the North and that frequencies of introgressed haplotypes in allochthonous populations did not increase over time. However, the introgression itself expanded towards adjacent populations while ...

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