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High unexpected genetic diversity of a narrow endemic terrestrial mollusc
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Orientador(es)
Resumo(s)
The Iberian Peninsula has an extensive record of species displaying strong genetic
structure as a result of their survival in isolated pockets throughout the Pleistocene
ice ages. We used mitochondrial and nuclear sequence data to analyze phylogeographic
patterns in endemic land snails from a valley of central Portugal (Vale da
Couda), putatively assigned to Candidula coudensis, that show an exceptionally narrow
distributional range. The genetic survey presented here shows the existence of five
main mitochondrial lineages in Vale da Couda that do not cluster together suggesting
independent evolutionary histories. Our results also indicate a departure from the
expectation that species with restricted distributions have low genetic variability. The
putative past and contemporary models of geographic distribution of Vale da Couda
lineages are compatible with a scenario of species co-existence in more southern
locations during the last glacial maximum (LGM) followed by a post-LGM northern
dispersal tracking the species optimal thermal, humidity and soil physical conditions
Descrição
Palavras-chave
endemic species terrestrial gastropods conservation biology evolutionary studies
Contexto Educativo
Citação
Madeira et al. (2017), High unexpected genetic diversity of a narrow endemic terrestrial mollusc. PeerJ 5:e3069
Editora
William Amos (ed.)