ORIGINAL RESEARCH
Structure and Composition of Bacterial Communities in Water Bodies of Typical Polders in the Chaohu Lake Basin, China
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Min Liu 1,2
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1
Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
 
2
Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province, Changjiang River Scientific Research Institute, Wuhan 430010, China
 
3
School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China
 
4
Innovation Team for Basin Water Environment Protection and Governance of Changjiang Water Resources Commission, Wuhan 430010, China
 
 
Submission date: 2025-07-21
 
 
Final revision date: 2025-10-17
 
 
Acceptance date: 2025-11-24
 
 
Online publication date: 2026-04-10
 
 
Corresponding author
Liangyuan Zhao   

Changjiang River Scientific Research Institute, Wuhan 430010, China
 
 
 
KEYWORDS
TOPICS
ABSTRACT
As key drivers of aquatic ecological cycles, microorganisms serve as sensitive bioindicators for ecosystem monitoring. Unlike natural water systems, the hydrological characteristics of the polder area are artificially regulated through sluices, resulting in stagnant flows with limited self-purification capacity. Characterizing microbial communities in diverse polder water types (ditches, ponds, and drainage stations) is therefore crucial for understanding these unique engineered ecosystems. This research employed 16S rRNA gene high-throughput sequencing to analyze microbial communities in diverse water bodies across two Chaohu Lake polders. We examined spatial variations in physicochemical properties, bacterial diversity, community structure, dominant genera, and their environmental correlations, providing insights into polder aquatic ecosystems. Results indicated high bacterial similarity between the outer rivers (Nanfei and Dianbu Rivers). Dominant phyla in polder waters were Proteobacteria, Patescibacteria, Bacteroidota, and Actinobacteriota, with Unclassified_f_Comamonadaceae, Magnetospirillum, and Azospirillum as predominant genera. Notably, Patescibacteria and Verrucomicrobiota showed higher abundance in Chaohu polders than freshwater lakes, indicating distinct bacterial community characteristics in this basin. Proteobacteria and Magnetospirillum were correlated with phosphorus and nitrogen, respectively. RDA analysis indicated TP, TN, CODMn, and DO as the primary environmental factors influencing the microbial community composition. The present research aims to provide scientific support for polder water environment management.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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