Aridity and grazing are associated with reduced trait complementarity and higher invasion intensity of Solanum rostratum in native plant communities

1The biotic resistance hypothesis (BRH) of Elton posits that diverse communities are more resistant to biological invasions. While the effects of climatic stresses and human disturbances on community invasibility have been extensively studied individually, their combined and potentially interactive influences remain poorly understood.
To address this problem, a national-scale survey was conducted on 3000 km in China to assess the relationship between the intensity of Solanum rostratum invasion and the diversity of native species.
Our study found that sites with higher native plant biodiversity generally exhibited lower S. rostratum invasion intensity. Specifically, native plant diversity helped resist invasion by improving community complementarity, increasing community density, coverage, and biomass, promoting community weighted means (CWM) of resource-conservative traits, and reducing trait differences between invasive and native plants. Furthermore, biodiversity loss was associated w..., , # Aridity and grazing are associated with reduced trait complementarity and higher invasion intensity of Solanum rostratum in native plant communities

Dataset DOI: [10.5061/dryad.v6wwpzh85](https://doi.org/10.5061/dryad.v6wwpzh85)

## Description of the data and file structure

This document describes the contents of the data files and analysis code associated with the manuscript: \"Aridity and grazing weaken the biotic resistance of native plant communities to *Solanum rostratum*’s invasion by reducing trait complementarity and resource-conservative traits\"

### Files and variables

#### File: code.R

**Description:** This R script contains all the statistical analyses presented in the manuscript. It integrates all major components of the data analysis workflow, including:

**Linear Mixed-Effects Models (LMMs):**

Assessing associations between ecological predictors and invasion intensity across multiple response variables, with pairwise interaction screening and automated extraction o...,