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Genetic variation and cryptic lineage diversity of the Nigerian red-headed rock agama Agama agama associate with eco-geographic zones

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Current Zoology 2019年第6期65卷 713-724页

作者： Lotanna M.NNEJI Adeniyi C.ADEOLA Fang YAN Agboola O.OKEYOYIN Ojo C.OLADIPO Yohanna SAIDU Dinatu SAMUEL Ifeanyi C.NNEJI Akindele O.ADEYI Abiodun B.ONADEKO Temidayo E.OLAGUNJU Olatunde OMOTOSO Segun O.OLADIPO Oluyinka A.IYIOLA John Y.USONGO Timothy AUTA Abbas D.USMAN Halima ABDULLAHI Odion O.IKHIMIUKOR Wei-Wei ZHOU Jie-Qiong JIN obih a.ugwumba Adiaha A.a.ugwumba Min-Sheng PENG Robert W.MURPHY Jing CHE State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunming 650223China Sino-Africa Joint Research Center Chinese Academy of SciencesKunming 650223China National Park Service Headquarters Federal Capital TerritoryAbuja 900001Nigeria Old Oyo National Park Oyo State 211242Nigeria Gashaka Gumti National Park SertiTaraba State 663101Nigeria Department of Biological Sciences University of AbujaFCTAbuja 902101Nigeria Department of Zoology University of IbadanIbadanOyo State 200284Nigeria Department of Zoology University of LagosLagos 100213Nigeria Department of Biosciences and Biotechnology Kwara State UniversityMaleteKwara State 241104Nigeria Department of Zoology Faculty of Life SciencesUniversity of llorinllorinKwara State 240103Nigeria Department of Zoology Modibbo Adama University of TechnologyYola 640101Nigeria Department of Biological Sciences Federal University Dutsin-MaKatsina State 821Nigeria Department of Biology Kashim Ibrahim College of EducationMaiduguriBorno State 600230Nigeria Department of Microbiology University of IbadanIbadanOyo State 200284Nigeria Centre for Biodiversity and Conservation Biology Royal Ontario MuseumTorontoOntarioCanada M5S 2C6

Nigeria is an Afrotropical region with considerable ecological heterogeneity and levels of biotic *** its vertebrate fauna,reptiles have broad distributions,thus,they constitute a compelling system for assessing the impact of ecological variation and geographic isolation on species *** red-headed rock agama,Agama agama,lives in a wide range of habitats and,thus,it may show genetic structuring and ***,we tested the hypothesis that ecology affects its genetic structure and population *** inference phylogenetic analysis of a mitochondrial DNA(mtDNA)gene recovered four well-supported matrilines with strong evidence of genetic structuring consistent with eco-geographic *** differences among populations based on the mtDNA also correlated with geographic distance. The ecologicalniche model for the matrilines had a good fit and robust performance. Population divergence alongthe environmental axes was associated with climatic conditions, and temperature ranked highestamong all environmental variables for forest specialists, while precipitation ranked highest for theforest/derived savanna, and savanna specialists. Our results cannot reject the hypothesis that nicheconservatism promotes geographic isolation of the western populations of Nigerian A. ***, ecological gradients and geographic isolation impact the genetic structure and population divergenceof the lizards. This species might be facing threats due to recent habitat fragmentation,especially in western Nigeria. Conservation actions appear necessary.

关键词： Agama agama ecological speciation genogeography Nigeria population divergence vegetation

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