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Plant Ecology

, Volume 220, Issue 1, pp 13–28 | Cite as

Contrasting elevational patterns of genetic variation in Euptelea pleiospermum along mountains at the core and edges of its latitudinal range

  • Hongjie Meng
  • Xinzeng WeiEmail author
  • Mingxi Jiang
Article
  • 85 Downloads

Abstract

Patterns of genetic variation along both latitudinal and elevational gradients have been intensively studied in the last few decades. To date, however, elevational patterns of genetic diversity and gene flow remain rarely compared for the same species along mountains at the center and edges of its latitudinal range. We used nuclear microsatellite analysis to compare the elevational patterns of both genetic variation and gene flow for Euptelea pleiospermum along elevational transects on the Qinling (33°N; leading edge), Shennongjia (31°N; mid-latitude), and Emei (29°N; rear edge) Mountains in China. First, we found no elevational pattern of genetic diversity along the two marginal mountains, but we found higher genetic diversity in the middle-altitude populations than in the low- and high-altitudes along the mid-latitude mountain. Second, there was no obvious genetic structure along the two marginal mountains, but individuals along the mid-latitude mountain were clustered into the upper and lower groups. Third, the contemporary gene flow along the two marginal mountains was higher than that along the mid-latitude mountain. Lastly, we found no isolation-by-distance along all three mountains and a significant isolation-by-elevation along the mid-latitude mountain but not along the two marginal mountains. Our results demonstrated that the elevational patterns of both genetic variation and gene flow for a tree species are different along mountains at the core and edges of its latitudinal range. These differences are likely associated with the discrepancies in spatial isolation, ecological stability, and vegetation types, but not historical events (e.g., post-glacial recolonization) at different latitudes.

Keywords

Elevation Euptelea pleiospermum Gene flow Genetic variation Latitudinal gradient Species range limit 

Notes

Acknowledgements

We thank Handong Huang, Dong He, Haibo Liu and Hao Wu for their assistance during fieldwork. This work was supported by the National Natural Science Foundation of China (Grant Nos. 31470515, 31570528; 31770572) and the State Key Laboratory of Vegetation and Environmental Change (Grant No. LVEC-2016kfxx).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11258_2018_899_MOESM1_ESM.docx (209 kb)
Supplementary material 1 (DOCX 209 kb)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical GardenChinese Academy of SciencesWuhanChina

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