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

查看全文 作　　者：Lotanna [1,2]M.NNEJI;Adeniyi [1,2]C.ADEOLA;Fang [1]YAN;Agboola [3]O.OKEYOYIN;Ojo [4]C.OLADIPO;Yohanna [5]SAIDU;Dinatu [5]SAMUEL;Ifeanyi [6]C.NNEJI;Akindele [7]O.ADEYI;Abiodun [8]B.ONADEKO;Temidayo [7]E.OLAGUNJU;Olatunde [7]OMOTOSO;Segun [9]O.OLADIPO;Oluyinka [10]A.IYIOLA;John [11]Y.USONGO;Timothy [12]AUTA;Abbas [13]D.USMAN;Halima [13]ABDULLAHI;Odion [14]O.IKHIMIUKOR;Wei-Wei [1]ZHOU;Jie-Qiong [1]JIN;Obih [7]A.UGWUMBA;Adiaha [7]A.A.UGWUMBA;Min-Sheng [1,2]PENG;Robert [1,15]W.MURPHY;Jing [1]CHE 机构地区：[1]State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese Academy of Sciences,Kunming 650223,China;[2]Sino-Africa Joint Research Center,Chinese Academy of Sciences,Kunming 650223,China;[3]National Park Service Headquarters,Federal Capital Territory,Abuja 900001,Nigeria;[4]Old Oyo National Park,Oyo State 211242,Nigeria;[5]Gashaka Gumti National Park,Serti,Taraba State 663101,Nigeria;[6]Department of Biological Sciences,University of Abuja,FCT,Abuja 902101,Nigeria;[7]Department of Zoology,University of Ibadan,Ibadan,Oyo State 200284,Nigeria;[8]Department of Zoology,University of Lagos,Lagos 100213,Nigeria;[9]Department of Biosciences and Biotechnology,Kwara State University,Malete,Kwara State 241104,Nigeria;[10]Department of Zoology,Faculty of Life Sciences,University of llorin,llorin,Kwara State 240103,Nigeria;[11]Department of Zoology,Modibbo Adama University of Technology,Yola 640101,Nigeria;[12]Department of Biological Sciences,Federal University Dutsin-Ma,Katsina State 821,Nigeria;[13]Department of Biology,Kashim Ibrahim College of Education,Maiduguri,Borno State 600230,Nigeria;[14]Department of Microbiology,University of Ibadan,Ibadan,Oyo State 200284,Nigeria;[15]Centre for Biodiversity and Conservation Biology,Royal Ontario Museum,Toronto,Ontario,Canada M5S 2C6 出　　处：《Current Zoology》索引2019年第65卷第6期,共12页 摘　　要：Nigeria is an Afrotropical region with considerable ecological heterogeneity and levels of biotic endemism.Among 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 diversification.The red-headed rock agama,Agama agama,lives in a wide range of habitats and,thus,it may show genetic structuring and diversification.Herein,we tested the hypothesis that ecology affects its genetic structure and population divergence.Bayesian inference phylogenetic analysis of a mitochondrial DNA(mtDNA)gene recovered four well-supported matrilines with strong evidence of genetic structuring consistent with eco-geographic regions.Genetic 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. agama.Thus, 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