A1 Journal article (refereed)
Evolutionary history of two cryptic species of northern African jerboas (2020)


Moutinho, A. F., Serén, N., Paupério, J., Silva, T. L., Martínez-Freiría, F., Sotelo, G., Faria, R., Mappes, T., Alves, P. C., Brito, J. C., & Boratyński, Z. (2020). Evolutionary history of two cryptic species of northern African jerboas. BMC Evolutionary Biology, 20, Article 26. https://doi.org/10.1186/s12862-020-1592-z


JYU authors or editors


Publication details

All authors or editors: Moutinho, Ana Filipa; Serén, Nina; Paupério, Joana; Silva, Teresa Luísa; Martínez-Freiría, Fernando; Sotelo, Graciela; Faria, Rui; Mappes, Tapio; Alves, Paulo Célio; Brito, José Carlos; et al.

Journal or series: BMC Evolutionary Biology

eISSN: 1471-2148

Publication year: 2020

Volume: 20

Article number: 26

Publisher: BioMed Central

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1186/s12862-020-1592-z

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67852


Abstract

Background
Climatic variation and geologic change both play significant roles in shaping species distributions, thus affecting their evolutionary history. In Sahara-Sahel, climatic oscillations shifted the desert extent during the Pliocene-Pleistocene interval, triggering the diversification of several species. Here, we investigated how these biogeographical and ecological events have shaped patterns of genetic diversity and divergence in African Jerboas, desert specialist rodents. We focused on two sister and cryptic species, Jaculus jaculus and J. hirtipes, where we (1) evaluated their genetic differentiation, (2) reconstructed their evolutionary and demographic history; (3) tested the level of gene flow between them, and (4) assessed their ecological niche divergence.

Results
The analyses based on 231 individuals sampled throughout North Africa, 8 sequence fragments (one mitochondrial and seven single copy nuclear DNA, including two candidate genes for fur coloration: MC1R and Agouti), 6 microsatellite markers and ecological modelling revealed: (1) two distinct genetic lineages with overlapping distributions, in agreement with their classification as different species, J. jaculus and J. hirtipes, with (2) low levels of gene flow and strong species divergence, (3) high haplotypic diversity without evident geographic structure within species, and (4) a low level of large-scale ecological divergence between the two taxa, suggesting species micro-habitat specialization.

Conclusions
Overall, our results suggest a speciation event that occurred during the Pliocene-Pleistocene transition. The contemporary distribution of genetic variation suggests ongoing population expansions. Despite the largely overlapping distributions at a macrogeographic scale, our genetic results suggest that the two species remain reproductively isolated, as only negligible levels of gene flow were observed. The overlapping ecological preferences at a macro-geographic scale and the ecological divergence at the micro-habitat scale suggest that local adaptation may have played a crucial role in the speciation process of these species.


Keywords: phylogenetics; speciation; environmental changes; deserts; adaptation (change); rodents

Free keywords: African jerboas; cryptic diversity; demographic history; deserts; Jaculus; local adaptation; phylogenetics; reproductive isolation; Sahara-Sahel; speciation


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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2


Last updated on 2024-03-04 at 21:16