The Impact of Stream Landscape on Genetic Structure and Dispersal Patterns in Stream Salamander(Pachyhynobius shangchengensis)  

作　　者：Tao PAN Hui WANG Peng YAN Chenling ZHANG Wenliang ZHOU Xiaobing WU Baowei ZHANG 

机构地区：[1]School of Life Sciences,Anhui University,Hefei 230601,Anhui,China [2]Anhui Province Key Laboratory of the Conservation and Exploitation of Biological Resource,School of Life Sciences,Anhui Normal University,Wuhu 241000,Anhui,China [3]Jiangsu Key Laboratory of Biofunctional Molecule Chemistry and Chemical Engineering,School of Life Sciences,Jiangsu Second Normal University,Nanjing 210013,Jiangsu,China

出　　处：《Asian Herpetological Research》2020年第3期205-218,共14页亚洲两栖爬行动物研究（英文版）

基　　金：supported by the National Na tural Science Founda tion of China(Grant No.31272332);Biodiversity Survey,Monitoring and Assessment Project of Ministry of Ecology and Environment China(2019HB2096001006);National Key Research and Development Program(2016YFC1200705);Anhui Province Higher Education Revitalization Plan;2014 Colleges and Universities Outstanding Youth Talent Support Program;2017 Anhui Province academic and technical leaders candidates(2017H130);Anhui Natural Science Foundation(Youth,1908085QC127);Research start-up funds of Anhui Normal University(No.751865);The Natural Science Foundation of the Jiangsu Higher Education Institutions of China(15KJB180003)。

摘　　要：Compared with other terrestrial environments,the stream environment generally presents a linear spatial structure and relatively simple environment.In a stream landscape,the dispersal direction of stream-type organisms usually presents a linear structure along the stream,which results in the limited dispersal and the genetic differentiation of stream-type organisms across different stream sections.The Shangcheng Stout Salamander(Pachyhynobius shangchengensis)is a narrowly distributed stream salamander in Dabie Mountains of East China.In the present study,we tested for the impact of stream landscape(i.e.waterfalls and underground river)on genetic structure and dispersal pattern in P.shangchengensis based on 12 nuclear microsatellite loci from 195 individuals in 3 populations(A,B and C)from three closely connected sections within one stream.Genetic diversity results suggested that Population B contains relatively high genetic diversity for P.shangchengensis when compared to the other populations(A and C).Detectable genetic differentiation was found(FST=0.008,P=0.007)among three populations,which was also supported by the Structure,FCA analysis and relatedness estimates of each pair of individuals among populations.The assignment test suggested that P.shangchengensis has philopatric males and female-biased dispersal(mean female Alc=.0.031,SE=0.225;mean male Alc=0.026,SE=0.198).Female-biased dispersal was also supported by analyses for each sex(i.e.Spatial autocorrelation,Genetic distance,Relatedness analysis).Our study indicated that small and isolated populations(A and C)had relatively low genetic diversity due to the limited population size.For stream salamanders,landscape features(i.e.waterfalls and underground river)can influence the ability of an individual to disperse through the landscape,and consequently influence the formation of strong genetic differentiation of P.shangchengensis.

关 键 词：Dabie Mounta ins genetic structure landscape features Pachyhynobius shangchengensis sexbiased dispersal 

分 类 号：Q953[生物学—动物学]