Population diversification in the frog Mantidactylus bellyi on an isolated massif in northern Madagascar based on genetic, morphological, bioacoustic and ecological evidence.

Autor: Rasolonjatovo SM; Mention Zoologie et Biodiversité Animale, Université d'Antananarivo, Antananarivo, Madagascar.; Association Vahatra, Lot V A 38 LBA Ter Ambohidempona Tsiadana, Antananarivo, Madagascar.; Division of Evolutionary Biology, Zoologisches Institut, Technische Universität Braunschweig, Braunschweig, Germany., Scherz MD; Division of Evolutionary Biology, Zoologisches Institut, Technische Universität Braunschweig, Braunschweig, Germany.; Natural History Museum of Denmark, University of Copenhagen, Copenhagen Ø, Denmark., Schmidt R; Division of Evolutionary Biology, Zoologisches Institut, Technische Universität Braunschweig, Braunschweig, Germany., Glos J; Institute of Zoology, Animal Ecology and Conservation, Universität Hamburg, Hamburg, Germany., Rakotoarison A; Mention Zoologie et Biodiversité Animale, Université d'Antananarivo, Antananarivo, Madagascar.; Division of Evolutionary Biology, Zoologisches Institut, Technische Universität Braunschweig, Braunschweig, Germany., Raselimanana AP; Mention Zoologie et Biodiversité Animale, Université d'Antananarivo, Antananarivo, Madagascar.; Association Vahatra, Lot V A 38 LBA Ter Ambohidempona Tsiadana, Antananarivo, Madagascar., Vences M; Division of Evolutionary Biology, Zoologisches Institut, Technische Universität Braunschweig, Braunschweig, Germany.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2022 Mar 31; Vol. 17 (3), pp. e0263764. Date of Electronic Publication: 2022 Mar 31 (Print Publication: 2022).
DOI: 10.1371/journal.pone.0263764
Abstrakt: In the processes that give rise to new species, changes first occur at the population level. But with the continuous nature of the divergence process, change in biological properties delimiting the shift from "individuals of divergent populations" towards "individuals of distinct species", as well as abiotic factors driving the change, remain largely ambivalent. Here we study diversification processes at the population level in a semi-aquatic frog, Mantidactylus (Brygoomantis) bellyi, across the diverse vegetation types of Montagne d'Ambre National Park (MANP), Madagascar. Genetic diversity was assessed with seven newly developed microsatellite markers as well as mitochondrial DNA sequences and concordance with patterns of ecological, morphological, and bioacoustic divergence evaluated. We found M. bellyi lacking mitochondrial differentiation within MANP, while microsatellite datasets partitioned them into three highly differentiated, geographically separated subpopulations (with indications for up to five subpopulations). The molecular grouping-primarily clustering individuals by geographic proximity-was coincident with differences in mean depth and width of waters, suggesting a possible role of fluvial characteristics in genetic exchange in this stream-breeding species. Genetic clustering not consistent with differences in call properties, except for dominant call frequencies under the two-subpopulations model. Morphological divergence was mostly consistent with the genetic clustering; subpopulations strongly differed by their snout-vent length, with individuals from high-elevation subpopulations smaller than those from populations below 1000 m above sea level. These results exemplify how mountains and environmental conditions might primarily shape genetic and morphological divergence in frog populations, without strongly affecting their calls.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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