Dominant species drive ecosystem multifunctionality under changed precipitation timing in a semi-arid steppe

Biodiversity significantly affects ecosystem multifunctionality, particularly in the context of changing precipitation patterns. However, the relative importance of multiple dimensions of diversity (e.g., taxonomic, functional, and phylogenetic diversity) on ecosystem multifunctionality under different precipitation patterns remains unclear. In this study, we conducted a seven-year field manipulation precipitation experiment in the semi-arid steppe to examine the effects of taxonomic, functional, and phylogenetic diversity on total ecosystem multifunctionality (EMF), aboveground ecosystem multifunctionality (AGEMF), and belowground ecosystem multifunctionality (BGEMF) under changed precipitation in different periods. The results showed that decreased precipitation in the early (DEP), late (DLP), and entire growing season (DP) reduced EMF by 6.5%, 8.4%, and 11.6%, respectively, whereas increased precipitation in different periods had no effect on EMF. DEP, DLP, and DP decreased AGEMF by ..., , # Dominant species drive ecosystem multifunctionality under changed precipitation timing in a semi-arid steppe

Dataset DOI: [10.5061/dryad.sqv9s4nfw](10.5061/dryad.sqv9s4nfw)

## Description of the data and file structure

Dominant species drive ecosystem multifunctionality under changed precipitation timing in a semi-arid steppe: Open Source Data

### Files and variables

| Variable | **Full name** | **Description** | \*\*Units \*\* |
| :-------- | :--------------------------------------- | :---------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------- |
| Treat | Treat | Experimental treatment group(see treatment codes below)  ...,

生物多样性显著影响生态系统多功能性，在降水格局变化的背景下尤为突出。然而，不同降水格局下，生物多样性的多个维度（如分类多样性、功能多样性与系统发育多样性）对生态系统多功能性的相对重要性仍未明确。本研究于半干旱草原开展了为期7年的野外降水调控实验，旨在探究不同降水时期变化下，分类、功能及系统发育多样性对总生态系统多功能性（ecosystem multifunctionality, EMF）、地上生态系统多功能性（aboveground ecosystem multifunctionality, AGEMF）以及地下生态系统多功能性（belowground ecosystem multifunctionality, BGEMF）的影响。研究结果显示，生长季早期降水减少（DEP）、生长季晚期降水减少（DLP）与全生长季降水减少（DP）分别使总生态系统多功能性降低6.5%、8.4%和11.6%；而不同时期的降水增加对总生态系统多功能性无显著影响。此外，DEP、DLP与DP分别使地上生态系统多功能性降低……
# 半干旱草原降水时序改变下优势种驱动生态系统多功能性：开源数据
数据集DOI：10.5061/dryad.sqv9s4nfw

## 数据与文件结构说明

### 文件与变量

| 变量名 | 完整名称 | 描述 | 单位 |
| :-------- | :--------------------------------------- | :---------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------- |
| Treat | 处理组 | 实验处理分组（详见下述处理代码） | 无