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...,

1. 埃尔顿提出的生物抗性假说（biotic resistance hypothesis, BRH）指出，物种丰富的群落对生物入侵的抵御能力更强。尽管学界已分别针对气候胁迫与人为干扰对群落可入侵性的影响开展了大量研究，但二者的联合作用及潜在交互效应仍有待深入阐明。
为解决这一研究空白，团队在中国境内开展了长达3000公里的全国性野外调查，以评估刺萼龙葵（Solanum rostratum）的入侵强度与本地物种多样性之间的关联。
本研究发现，本地植物生物多样性更高的样地，其刺萼龙葵入侵强度普遍更低。具体而言，本地植物多样性可通过提升群落功能互补性、提高群落密度、盖度与生物量，促进群落资源保守型性状的群落加权平均值（community weighted means, CWM），以及缩小入侵物种与本地植物的性状差异，从而抵御生物入侵。此外，生物多样性丧失与……相关联。# 干旱与放牧降低本地植物群落的功能互补性并提升刺萼龙葵入侵强度

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

## 数据与文件结构说明

本文档旨在说明与以下学术论文相关的数据文件及分析代码：《干旱与放牧通过降低功能互补性与资源保守型性状削弱本地植物群落对刺萼龙葵入侵的生物抗性》

### 文件与变量

#### 文件：code.R

**说明**：该R脚本包含论文中呈现的全部统计分析内容，整合了数据分析流程的所有核心环节，包括：

**线性混合效应模型（Linear Mixed-Effects Models, LMMs）**：

针对多个响应变量下生态预测因子与入侵强度之间的关联开展分析，涵盖两两交互效应筛选与自动化提取等……