Journal of Biogeography, Journal Year: 2025, Volume and Issue: unknown

Published: April 5, 2025

ABSTRACT Aim Exploring the divergence and speciation processes is central to understanding origin maintenance of biodiversity. The dry valley mosaic in Hengduan Mountains its southern extension range one special landscapes globally harbours a high level endemic plants tropical margin nature. valleys lowlands‐adapted constitute unique system explore how geological ecological effects have shaped here. Location Subtropical China. Taxon Diospyros dumetorum saxatilis. Methods We surveyed patterns genetic variation from 33 populations spanning their distribution ranges using three chloroplast DNA fragments eight nuclear microsatellite loci. Approximate Bayesian computation was conducted compare population demographic models considering gene flow estimate key parameters. used Ecological Niche Models (ENMs) reconstruct changes during glacial interglacial periods evaluate niche differentiation. Results Plastid data strongly support between two species occurring Pliocene/Pleistocene period followed by secondary contact response climatic oscillations. ENMs predicted drastic Quaternary identified significant differences conditions at set locations occupied these species. Correlation analyses were conducted, results suggest that geographical isolation rather than environmental heterogeneity shapes current structure within Main Conclusion Phylogeographical revealed our document geographic vicariance associated with tectonic uplifts initiated allopatric species, differentiation perhaps further accelerated limited subsequent flow. Our findings could contribute knowledge forces drive landscape valleys, as well evolution flora subtropical

Language: Английский