摘要
Global climate change is expected to have a profound effect on species distribution.Due to the temperature constraints,some narrow niche species could shift their narrow range to higher altitudes or latitudes.In this study,we explored the correlation between species traits,genetic structure,and geographical range size.More specifically,we analyzed how these variables are affected by differences in fundamental niche breadth or dispersal ability in the members of two sympatrically distributed stream-dwelling amphibian species(frog,Quasipaa yei;salamander,Pachyhynobius shangchengensis),in Dabie Mountains,East China.Both species showed relatively high genetic diversity in most geographical populations and similar genetic diversity patterns(JTX,low;BYM,high)correlation with habitat changes and population demography.Multiple clustering analyses were used to disclose differentiation among the geographical populations of these two amphibian species.Q.yei disclosed the relatively shallow genetic differentiation,while P.shangchengensis showed an opposite pattern.Under different historical climatic conditions,all ecological niche modeling disclosed a larger suitable habitat area for Q.yei than for P.shangchengensis;these results indicated a wider environment tolerance or wider niche width of Q.yei than P.shangchengensis.Our findings suggest that the synergistic effects of environmental niche variation and dispersal ability may help shape genetic structure across geographical topology,particularly for species with extremely narrow distribution.
基金
supported by the National Natural Science Foundation of China(No.32070417)
the Anhui Natural Science Foundation(Youth,1908085QC127)
the Biodiversity Survey,Monitoring and Assessment Project(2019–2023)of Ministry of Ecology and Environment,Special Investigation of Basic Science and Technology Resources(2019 FY101803)
Anhui Province Academic and Technical Leader and Backup Candidate Academic Research Activities Fund(2017H130).
