Environmental heterogeneity leads to spatial differences in genetic diversity and demographic structure of acer caudatifolium

Min Xin Luo, Hsin Pei Lu, Min Wei Chai, Jui Tse Chang, Pei Chun Liao*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Under climate fluctuation, species dispersal may be disturbed by terrain and local climate, resulting in uneven spatial-genetic structure. In addition, organisms at different latitudes may be differentially susceptible to climate change. Here, we tracked the seed dispersal of Acer caudatifolium using chloroplast DNA to explore the relationships of terrain and local climate heterogeneity with range shifts and demography in Taiwan. Our results showed that the extant populations have shifted upward and northward to the mountains since the Last Glacial Maximum. The distributional upshift of A. caudatifolium is in contrast to the downward expansion of its closest relative in Taiwan, A. morrisonense. The northern populations of A. caudatifolium have acquired multiple-source chloro-types and harbor high genetic diversity. However, effective gene flow between the north and south is interrupted by topography, geographic distance, north-south differences in October rainfall, and other climate heterogeneities, blocking southward genetic rescue. In addition, winter monsoon-driven rainfall may cause regional differences in the phenological schedule, resulting in adaptive effects on the timing of range shift and the genetic draft of chlorotype distribution. Terrain, distance, and local climate also differentiate the northernmost populations from the others, supporting the previous taxonomic treatment of Acer kawakamii var. taitonmontanum as an independent variety.

原文英語
文章編號1646
期刊Plants
10
發行號8
DOIs
出版狀態已發佈 - 2021 八月

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 生態學
  • 植物科學

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