Size-dependent genetic erosion due to human logging and conservation recommendation for an endangered Yew (Taxus fuana) in Tibet, China

Taxus fuana, an endemic plant of the West Himalayas, has an extremely small population size and is currently threatened by heavy logging due to its medicinal properties. However, the impacts of human-induced logging on population size and tree size-class distribution, and their consequences for genetic diversity in China remain unclear, constraining conservation efficacy. Field surveys across six Gyirong sites indicated that trees with basal diameters of 6–30 cm experienced the most severe logging damage, particularly at Jilong (JL) and Langjiu (LJ). Both chloroplast DNA (ɸST = 0.138) and nuclear SSR (FST = 0.091) revealed significant differentiation among sites. Demographic modeling and gene flow estimates suggest that restricted gene flow and enhanced genetic drift in smaller sites appear to have driven this differentiation. Moreover, genetic diversity declined in a size-dependent manner: larger sites at Kaire (KR) and Jipu (JP) maintained higher haplotype diversity, nucleotide divers..., , , # Data from: Size-dependent genetic erosion due to human logging and conservation recommendation for an endangered Yew (*Taxus fuana*) in Tibet, China

[https://doi.org/10.5061/dryad.msbcc2g7g](https://doi.org/10.5061/dryad.msbcc2g7g)

These files provide the data (.csv):

1. Basal diameter and of six *Taxus* fuana population in Gyriong
2. Number of logged *Taxus* fuana in each population
3. Number of logged *Taxus* fuana in different size class in Kaire and Jilong
4. Location information and DBH of *Taxus* fuana SSR samples
5. SSR data of *Taxus* fuana based on nine microsatellites
in the manuscript \"Size-dependent genetic erosion due to human logging and conservation recommendation for an endangered Yew (*Taxus fuana*) in Tibet, China\".

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## Description of the data and file structure

* Basal diameter of six Taxus fuana population in Gyriong:
* **POP**: Represents populations, including KR(Kaire), TB(Tangbo), LJ(Lanjiu), JP(Jipu), JL(Jilong) and DF(Duofu)
* **Basal diameter...,