Challenging the European southern refugium hypothesis: species specific structures vs. general patterns of genetic diversity and differentiation among small mammals.

Pedreschi, D.J., Yannic, G., Cantarello, E., Diaz, A., Golicher, D., Korstjens, A., Heckel, G., Searle, J.B., Gillingham, P.K., Hardouin, E.A. and Stewart, J. R., 2018. Challenging the European southern refugium hypothesis: species specific structures vs. general patterns of genetic diversity and differentiation among small mammals. Global Ecology and Biogeography. (In Press)

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Abstract

Aim: In this study, we conduct a quantitative meta-analysis to investigate broad patterns of genetic variation throughout large geographic regions in order to elucidate concordant geographical patterns across species and identify common historical processes to better inform the ‘cryptic refugia’ vs. the traditional ‘southern refugia’ hypothesis debate. Location: Europe Time period: Late Pleistocene to present day. Major taxa studied: small mammals (Rodentia, Eulipotyphla) Methods: A meta-analysis was performed on large scale patterns of genetic diversity for 19 species from 59 papers. For each species, haplotype and nucleotide diversity were calculated using the mitochondrial D-loop and compared to the species range. Results: No consistent patterns were observed between mtDNA diversity indices (nucleotide and haplotype diversity) and any of the indicators of distribution examined (latitude and longitude (max, min, centre, range)). The patterns of genetic diversity observed in all the 19 species studied appear to be species-specific. Main conclusion: In contrast to the traditional southern refugial hypotheses, we found no evidence for a consistent south-north post-glacial expansion. Instead individual species appear to respond to climate oscillations in niche-specific ways. This individual nature of each species’ phylogeographical history indicates a complex web of postglacial recolonisation dynamics across Europe.

Item Type:Article
ISSN:1466-822X
Group:Faculty of Science & Technology
ID Code:31227
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:12 Sep 2018 10:09
Last Modified:12 Sep 2018 10:30

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