Scholarlink

Purpose <p>In recent years, excessive nitrogen and phosphorus inputs have caused widespread eutrophication in shallow lakes. Aquatic vegetation plays a crucial role in lake ecological restoration. This study aims to investigate the effects of different types of aquatic vegetation on sediment microbial community structure and nitrogen cycling functions.</p> Materials and methods <p>In this study, sediment samples were collected from zones dominated by emergent, floating, and floating-leaved plants in July (the aquatic vegetation growing period) and October (the aquatic vegetation maturation period). We investigated the influence of vegetation type on microbial community diversity, structure, and potential nitrogen cycling functions by integrating 16&#xa0;S rRNA gene high-throughput sequencing with functional prediction.</p> Results <p>The results revealed that the sediment microbial diversity was highest in the floating plant zone. The abundance of <i>Firmicutes</i> was significantly higher in the emergent plant zone compared to other vegetation zones (<i>p</i> &lt; 0.05), whereas Sva0485 and <i>Nitrospirota</i> were more abundant in the floating plant zone. Sediment organic carbon, pH, and inorganic nitrogen were identified as primary environmental factors shaping microbial community distribution across vegetation zones. Functional predictions indicated that dissimilatory nitrate reduction to ammonium was the predominant nitrogen cycling pathway in all zones, with the emergent plant zone exhibiting higher potentials for nitrogen fixation and denitrification.</p> Conclusions <p>Floating plant zone showed the highest microbial diversity. Firmicutes was more abundant in the emergent plant zone, whereas Sva0485 and Nitrospirota were more abundant in the floating plant zone. DNRA was the predominant nitrogen cycling pathway in all zones.</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 aquatic vegetation on sediment microbial communities and potential nitrogen cycling functions in a shallow lake

  • 期刊论文

  • 发表日期：

    2026年7月21日

查看全文
  • Sile Wen,
  • Wangting Yang,
  • Lan Zhou,
  • Yuling Yang,
  • Jinghao Jin,
  • Bingjie Ren,
  • Yuzhi Song,
  • Yanan Bai,
  • Lidong Shen

摘要

Purpose

In recent years, excessive nitrogen and phosphorus inputs have caused widespread eutrophication in shallow lakes. Aquatic vegetation plays a crucial role in lake ecological restoration. This study aims to investigate the effects of different types of aquatic vegetation on sediment microbial community structure and nitrogen cycling functions.

Materials and methods

In this study, sediment samples were collected from zones dominated by emergent, floating, and floating-leaved plants in July (the aquatic vegetation growing period) and October (the aquatic vegetation maturation period). We investigated the influence of vegetation type on microbial community diversity, structure, and potential nitrogen cycling functions by integrating 16 S rRNA gene high-throughput sequencing with functional prediction.

Results

The results revealed that the sediment microbial diversity was highest in the floating plant zone. The abundance of Firmicutes was significantly higher in the emergent plant zone compared to other vegetation zones (p < 0.05), whereas Sva0485 and Nitrospirota were more abundant in the floating plant zone. Sediment organic carbon, pH, and inorganic nitrogen were identified as primary environmental factors shaping microbial community distribution across vegetation zones. Functional predictions indicated that dissimilatory nitrate reduction to ammonium was the predominant nitrogen cycling pathway in all zones, with the emergent plant zone exhibiting higher potentials for nitrogen fixation and denitrification.

Conclusions

Floating plant zone showed the highest microbial diversity. Firmicutes was more abundant in the emergent plant zone, whereas Sva0485 and Nitrospirota were more abundant in the floating plant zone. DNRA was the predominant nitrogen cycling pathway in all zones.