Did the Quaternary climatic fluctuations really influence the tempo and mode of diversification in European rodents? - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Zoological Systematics and Evolutionary Research Année : 2017

Did the Quaternary climatic fluctuations really influence the tempo and mode of diversification in European rodents?

Résumé

The objective of this study was to establish whether the Quaternary climatic fluctuations influenced the tempo and mode of diversification in European rodents. Our case study is the subgenus Microtus (Terricola) distributed from western Europe to the Caucasus. Mitochondrial cytochrome b gene sequences from several representatives of all the species were used to generate maximum-likelihood and Bayesian phylogenetic trees, to estimate divergence times, to identify biogeographic ancestral areas and to study the rate of diversification. Results showed that phylogenetic tree topologies were similar to previous published studies but with a better resolution at some nodes. The origin of Microtus (Terricola) is dated back to approximately 4.05 Myr in the Early Pliocene, and molecular dating for most Terricola species corresponds to several glacial periods of the Pleistocene. Results of the biogeographic ancestral area reconstruction suggest that Microtus (Terricola) diversified from the Caucasus/Turkey/Iran area through western Europe. Several periods of diversity variation were highlighted as follows: two period of diversity increase, between 3 and 2 Myr, and after 1 Myr; two periods of diversity decrease, before 3 Myr, and between 2 and 1 Myr. The diversification rate of Microtus (Terricola) was 0.353 0.004 event/Myr, a rate similar to that of the Muridae family. To conclude, although the Pleistocene glacial conditions had an impact on the speciation events, the Quaternary does not appear however as a period with an exceptional rate of diversification for European rodents.
Fichier principal
Vignette du fichier
Tougard_2018.pdf (2.89 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01921408 , version 1 (30-11-2020)

Identifiants

Citer

Christelle Tougard. Did the Quaternary climatic fluctuations really influence the tempo and mode of diversification in European rodents?. Journal of Zoological Systematics and Evolutionary Research, 2017, 55 (1), pp.46 - 56. ⟨10.1111/jzs.12152⟩. ⟨hal-01921408⟩
49 Consultations
105 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More