Scholarlink

<p>The widespread use of aluminum-based coagulants in ecological restoration projects has raised increasing concerns regarding the potential ecological impacts of residual aluminum (Al) in aquatic ecosystems. Epiphytic biofilms on submerged plants play a vital role in regulating nutrient cycling and energy flow in aquatic environments. However, the effects of Al on the biological and abiotic components of epiphytic biofilms on submerged macrophyte leaves remain poorly understood. In this study, we investigated the Al content in epiphytic biofilms on <i>Vallisneria natans</i> and its relationships with nitrogen, phosphorus and bacterial composition in Hangzhou West Lake, China. This location was selected due to the potential for residual Al into the lake from the daily pretreatment of the Qiantang River water diversion project—a water quality improvement project. Our results showed that Al contents in epiphytic biofilms decreased with increasing distance from the inlet and were positively correlated with total phosphorus, Chlorophyll-a and ash-free dry mass (<i>P</i> &lt; 0.05), but showed no significant correlation with total nitrogen. Al accumulation enhanced Chl-a levels in biofilms by increasing the inorganic phosphorus content. Furthermore, Al content was positively correlated with the abundance of Cyanobacteria and negatively correlated with the abundance of Proteobacteria. Al also showed a significant negative correlation with key denitrifying bacteria, such as <i>Vogesella</i> and <i>Phreatobact</i>er, suggesting that elevated Al levels might affect the nitrogen cycling function in epiphytic biofilms. These findings provide important reference data for for ecological risk assessment and inform management strategies for aquatic systems undergoing restoration or exposed to aluminum-based treatments.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of Aluminum Salts on Bacterial Community in Epiphytic Biofilms on Vallisneria Natans Leaves: Characteristics of Nitrogen and Phosphorus Fractions and Bacterial Community Composition

  • 期刊论文

  • 发表日期：

    2026年3月5日

查看全文
  • Xue Peng,
  • Xinyi Zhang,
  • Shuxian Zhang,
  • Qingwei Lin,
  • Haokun Zhang,
  • Xiaowen Zhang,
  • Yi Zhang,
  • Steven Jing-Liang Xu,
  • Fred Wang-Fat Lee,
  • Nora Fung-yee Tam,
  • Zhenbin Wu,
  • Biyun Liu

摘要

The widespread use of aluminum-based coagulants in ecological restoration projects has raised increasing concerns regarding the potential ecological impacts of residual aluminum (Al) in aquatic ecosystems. Epiphytic biofilms on submerged plants play a vital role in regulating nutrient cycling and energy flow in aquatic environments. However, the effects of Al on the biological and abiotic components of epiphytic biofilms on submerged macrophyte leaves remain poorly understood. In this study, we investigated the Al content in epiphytic biofilms on Vallisneria natans and its relationships with nitrogen, phosphorus and bacterial composition in Hangzhou West Lake, China. This location was selected due to the potential for residual Al into the lake from the daily pretreatment of the Qiantang River water diversion project—a water quality improvement project. Our results showed that Al contents in epiphytic biofilms decreased with increasing distance from the inlet and were positively correlated with total phosphorus, Chlorophyll-a and ash-free dry mass (P < 0.05), but showed no significant correlation with total nitrogen. Al accumulation enhanced Chl-a levels in biofilms by increasing the inorganic phosphorus content. Furthermore, Al content was positively correlated with the abundance of Cyanobacteria and negatively correlated with the abundance of Proteobacteria. Al also showed a significant negative correlation with key denitrifying bacteria, such as Vogesella and Phreatobacter, suggesting that elevated Al levels might affect the nitrogen cycling function in epiphytic biofilms. These findings provide important reference data for for ecological risk assessment and inform management strategies for aquatic systems undergoing restoration or exposed to aluminum-based treatments.

Graphical Abstract