Phylogeography and predicted distribution of African-Arabian and Malagasy populations of giant mastiff bats, Otomops spp. (Chiroptera: Molossidae)

• Autorzy: Lamb J.M. , Ralph T. M. C. , Goodman S. M. , Bogdanowicz W. , Fahr J. , Gajewska M. , Bates P. J. J. , Eger J. , Benda P. , Taylor P. J.
• Języki publikacji: EN

Abstrakty

EN

Otomops martiensseni is sparsely distributed throughout sub-Saharan Africa and southwestern Arabia (Yemen). Otomops madagascariensis from the dry portions of Madagascar is widely recognised to be a distinct species. Based on mitochondrial DNA sequences of the cytochrome b gene (1,004 base pairs; n = 50) and the control region (D-loop, 290 base pairs; n = 52), two Oriental outgroup species (O. wroughtoni and O. cf. formosus) formed a monophyletic clade that was the sister group to the Afro-Malagasy taxa, composed of O. martiensseni and O. madagascariensis. Within the Afro-Malagasy clade, we discovered three well-supported but genetically similar clades (inter-clade genetic distances of 3.4–4.4%) from 1) north-eastern Africa and Arabia, 2) African mainland except northeast Africa, and 3) Madagascar. Taken together, haplotype networks, estimated divergence times, regional species richness and historical demographic data tentatively suggested dispersal from Asia to Africa and Madagascar. To understand ecological determinants of phylogeographic, biogeographic and genetic structure, we assessed the potential distribution of O. martiensseni throughout sub-Saharan Africa with ecological niche modelling (MaxEnt) based on known point localities (n = 60). The species is predicted to occur mainly in woodlands and forests and in areas of rough topography. Continuity of suitable habitats supported our inferred high levels of continental gene flow (relatively low genetic distances), and suggested that factors other than habitat suitability have resulted in the observed phylogeographic structure (e.g., seasonal mass migrations of insects that might be tracked by these bats). Based on a Bayesian relaxed clock approach and two fossil calibration dates, we estimated that African and Oriental clades diverged at 4.2 Mya, Malagasy and African clades at 1.5 Mya, and African clades 1 and 2 at 1.2 Mya. Integrating phylogenetic, phylogeographic, population genetic and ecological approaches holds promise for a better understanding of biodiversity patterns and evolutionary processes.

Słowa kluczowe

EN

phylogeography; predicted distribution; African-Arabian population; Malagasy population; bat; animal population; giant mastiff bat; Otomops; Chiroptera; Molossidae; mitochondrial DNA; niche modelling

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2008
• Tom: 10
• Numer: 1
• Opis fizyczny: p.21-40,fig.,ref.

Twórcy

autor

Lamb J.M.

• School of Biological and Conservation Sciences, George Campbell Building, University of Kwa-Zulu Natal, King George V Avenue, Durban, 4041 Kwa-Zulu Natal, South Africa

autor

Ralph T. M. C.

• School of Biological and Conservation Sciences, George Campbell Building, University of Kwa-Zulu Natal, King George V Avenue, Durban, 4041 Kwa-Zulu Natal, South Africa

autor

Goodman S. M.

• Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, 60605 Illinois, USA
• Vahatra, BP 3972, Antananarivo (101), Madagascar

autor

Bogdanowicz W.

• Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-679 Warsaw, Poland

autor

Fahr J.

• Institute of Experimental Ecology, Ulm University, Albert-Eistein Allee 11, D-89069 Ulm, Germany

autor

Gajewska M.

• Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-679 Warsaw, Poland

autor

Bates P. J. J.

• Harrison Institute, Centre for Systematics and Biodiversity Research, Bowerwood House, St. Botolph's Road, Sevenoaks, Kent, TN13 3AQ, Great Britain

autor

Eger J.

• Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada

autor

Benda P.

• Department of Zoology, National Museum (Natural History) and Department of Zoology, Charles University, 128 44 Prague, Czech Republic

autor

Taylor P. J.

• Durban Natural Science Museum, P.O. Box 4085, Durban, 4000, South Africa

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