Unique roles of functional group of submerged macrophytes on ecosystem functions

The presence of submerged plant communities and the restoration of their diversity have critical impacts on aquatic ecosystem function, especially in eutrophic lakes. However, we lack a holistic understanding of how specific species and functional groups and their richness of submerged macrophytes affect the community productivity and water quality in aquatic ecosystems, and how these effects vary across water nutrient gradients. Here, we performed a mesocosm experiment by manipulating species richness and functional richness from a species pool of 22 submerged macrophytes to test what are the ecological implications of shifts in macrophyte diversity under two nutrient levels. The results showed that species richness significantly enhanced community productivity only at low nutrient levels, while functional richness had no marked effects on community productivity across nutrient levels. The improvement of water quality by increasing submerged plant diversity (species and functional grou..., , # Data from: Unique roles of functional groups of submerged macrophytes on ecosystem functions

Dataset DOI: [10.5061/dryad.73n5tb3bb](https://doi.org/10.5061/dryad.73n5tb3bb)

## Description of the data and file structure

We conducted a mesocosm experiment to test how species richness and functional group richness of 22 submerged macrophytes affect water quality and community productivity under low and high nutrient conditions. Water quality variables measured included chlorophyll a, total nitrogen, total phosphorus, ammonium, nitrate, orthophosphate, COD, dissolved oxygen, and conductivity, while community biomass was recorded as dry weight. The presence of different functional groups, characterized by traits such as leaf dry mass content, specific leaf area, flowering duration, and shoot height, was analyzed for their unique effects on ecosystem functions. Data from these measurements were compiled in FC_Eco.xlsx and used for all statistical analyses.

#### File: FC_Eco.xlsx

**Desc...,

沉水植物群落的存在及其多样性恢复对水生生态系统功能具有关键影响，在富营养化湖泊中尤为显著。然而，当前学界对沉水大型植物（submerged macrophytes）的特定物种、功能群及其丰富度如何影响水生生态系统的群落生产力与水质，以及这些影响随水体营养盐梯度的变化规律，尚缺乏全面认知。

本研究依托包含22种沉水大型植物的物种库，通过调控物种丰富度与功能群丰富度开展中宇宙（mesocosm）实验，以探究两种营养盐水平下大型植物多样性变化的生态学意义。研究结果显示：仅在低营养盐条件下，物种丰富度可显著提升群落生产力；而无论营养盐水平如何，功能群丰富度对群落生产力均无显著影响。提升沉水植物多样性（物种与功能群...）可改善水质。

# 数据来源：《沉水植物功能群在生态系统功能中的独特作用》（Unique roles of functional groups of submerged macrophytes on ecosystem functions）
数据集DOI: [10.5061/dryad.73n5tb3bb](https://doi.org/10.5061/dryad.73n5tb3bb)

## 数据与文件结构说明
本研究开展中宇宙实验，旨在探究22种沉水大型植物的物种丰富度与功能群丰富度在高低营养盐条件下对水质与群落生产力的影响。本次测定的水质指标包括叶绿素a、总氮、总磷、铵态氮、硝态氮、正磷酸盐、化学需氧量（COD）、溶解氧以及电导率；群落生物量以干重计。本研究针对以叶片干物质含量、比叶面积、开花时长以及株高为特征的不同功能群，分析其对生态系统功能的独特作用。上述测定数据均整理于FC_Eco.xlsx文件中，用于所有统计分析。

#### 文件：FC_Eco.xlsx
**Desc...,**