Data for: Trait-mediated responses of native plant diversity to combined urban and alien pressures in wastelands

This dataset comprises all data used to analyze the combined effects of urbanization and alien plants on native plant diversity via trait‑mediated pathways in urban wastelands in Guiyang. It includes species names, abundances of native and alien herbaceous plants, functional traits of native plants, and environmental variables collected from 100 wasteland plots along urban–rural gradients, as well as the code used for these analyses.