The role of climatic cycles and trans-Saharan migration corridors in species diversification: Biogeography of Psammophis schokari group in North Africa

Autor: Philippe Geniez, Duarte V. Gonçalves, Fernando Martínez-Freiría, Pierre-André Crochet, José Carlos Brito, Salvador Carranza
Přispěvatelé: Universidade do Porto = University of Porto, Departamento de Biologia, Faculdade de Ciências, Centro de Regulación Genómica (CRG), Universitat Pompeu Fabra [Barcelona] (UPF), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), National Geographic Society (CRE 7629-04/8412-08), Mohamed bin Zayed Species Conservation Fund (11052709, 11052707, 11052499), Fundação para a Ciência e a Tecnologia (PTDC/BIA-BEC/099934/2008 and PTDC/BIA-BIC/2903/2012), ERDF funds through the Operational Programme for Competitiveness Factors - COMPETE (FCOMP-01-0124-FEDER-008917/028276), Universidade do Porto, Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud])
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
0301 basic medicine
Paleoclimate
Biodiversité et Ecologie
Climate
variabilité génétique
modélisation spatiale
Parapatric speciation
migration
01 natural sciences
corridor écologique
Africa
Northern
Climatic cycles
Ecological niche-based modelling
Phylogeography
Snakes
Vicariance
paléoclimat
Holocene
Phylogeny
Likelihood Functions
Ecology
phylogéographie
Last Glacial Maximum
diversification des espèces
Cytochromes b
Pleistocene
Biogeography
Biology
010603 evolutionary biology
DNA
Mitochondrial
Biodiversity and Ecology
03 medical and health sciences
Genetics
Animals
14. Life underwater
Molecular Biology
Ecology
Evolution
Behavior and Systematics
serpent
afrique du nord
Genetic Variation
Bayes Theorem
NADH Dehydrogenase
Sequence Analysis
DNA
15. Life on land
030104 developmental biology
Biological dispersal
Animal Migration
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Zdroj: Molecular Phylogenetics and Evolution
Molecular Phylogenetics and Evolution, 2018, 118, pp.64-74. ⟨10.1016/j.ympev.2017.09.009⟩
Molecular Phylogenetics and Evolution, Elsevier, 2018, 118, pp.64-74. ⟨10.1016/j.ympev.2017.09.009⟩
Molecular Phylogenetics and Evolution (118), 64-74. (2018)
ISSN: 1055-7903
1095-9513
Popis: International audience; Highlands, hydrographic systems and coastal areas have been hypothesised to form corridors across the hyperarid Sahara desert in North Africa, allowing dispersal and gene flow for non-xeric species. Here we aim to provide a genetic test for the trans-Saharan corridor model, and predict the location and stability of ecological-corridors, by combining phylogeography and palaeoclimatic modelling. The model was the Psammophis schokari (Schokari sand racer) group, fast-moving and widely distributed generalist colubrids occurring mostly in arid and semiarid scrublands. We combined dated phylogenies of mitochondrial and nuclear markers with palaeoclimatic modelling. For the phylogeographic analysis, we used 75 samples of P. schokari and P. aegyptius, and Bayesian and Maximum-Likelihood methods. For the ecological models, we used Maxent over the distribution of P. schokari and West African lineages. Models were projected to past conditions (mid Holocene, Last Glacial Maximum and Last Inter-Glacial) to infer climatic stable areas. Climatic stability was predicted to be mostly restricted to coastal areas and not spatially continuous. A putative temporary trans-Saharan corridor was identified in Eastern Sahara, with a more stable one along the Atlantic coast. Six parapatric lineages were identified within P. schokari, four occurring in North Africa. These likely diverged during the Pliocene. The Tamanraset River might have been a vicariant agent. African lineages may have experienced further subsequent diversification during the late Pleistocene. The main P. schokari refugia were probably located along the northern margins of the Sahara, allowing its North-to-South colonization. Trans-Saharan corridors seem to have played a role in P. schokari biogeography, allowing colonization of central Saharan mountains and Sahel. Some might have worked as refugia, and even the most stable corridors may have sections working as filters, depending on each climatic phase. We expect the use of trans-Saharan corridors to decrease for more mesic species or with less dispersal capabilities.
Databáze: OpenAIRE
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