par Vargas Rivera, Gersey 
Promoteur Dapporto, Leonardo
Co-Promoteur Fratini, Sara;Cini, Alessandro
Publication Non publié, 2021-08-31
Promoteur Dapporto, Leonardo
Co-Promoteur Fratini, Sara;Cini, Alessandro
Publication Non publié, 2021-08-31
Mémoire
| Résumé : | Remote insular systems host unique populations and communities which are frequentlyassumed to be highly isolated from the mainland. However, exceptional dispersers likewidespread species might contradict this assumption. The Azores archipelago is more than1,300 km away from the mainland representing a highly isolated remote archipelago hostingfive species of widespread butterflies (Colias crocea, Pieris brassicae, Lampides boeticus,Vanessa cardui and Vanessa atalanta). This thesis aimed to achieve insights on thephylogeographic patterns of these species to understand better their dispersal capabilities andthe relationships of the Azorean populations with the mainland ones. This was done by creatinghaplotype networks with the mitochondrial cytochrome c oxidase subunit I (COxI) fromspecimens collected throughout the entire species’ distributions and the Azores to depict thepatterns of intra- and inter-population genetic diversity. High genetic diversity was evidenced inthe Azores based on the collection of multiple haplotypes during the same sampling event formost of the species. The results showed that each species had distinctive haplotype networksand gave insights that allowed for different speculations about their populational relationships.For example, the demographic history of L. boeticus and C. crocea played important roles inunderstanding their haplotype networks. Meanwhile, excellent dispersal capabilities and thepossible use of wind patterns were more relevant for the cases of V. cardui and V. atalanta.Conversely, the association of P. brassicae with anthropogenic activities explained better itshaplotype network. All these speculations require further investigations, and many questionsremain from this study. |
