ORIGINAL RESEARCH
Levels, Spatial Distribution, and Sources of Heavy Metals in Karst Caohai Wetlands and Their Impact on Bacterial Community Diversity and Symbiotic Patterns, China
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Jing Hu 1,3
 
 
 
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1
College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, PR China
 
2
Guizhou Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, PR China
 
3
Guizhou Jiamu Environmental Protection Technology Co, Ltd, PR China
 
 
Submission date: 2024-09-21
 
 
Final revision date: 2024-12-18
 
 
Acceptance date: 2025-03-25
 
 
Online publication date: 2025-06-27
 
 
Corresponding author
Jing Hu   

College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, 550025, China
 
 
 
KEYWORDS
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ABSTRACT
Karst wetlands play a crucial role in heavy metal transport and biogeochemical cycles. This study analyzed heavy metal contents and morphological distribution in sediment samples from Caohai wetlands, Guizhou Province, and investigated bacterial community composition and its interaction with heavy metals using 16S rRNA sequencing. Results showed severe heavy metal pollution in Caohai wetlands, with high bacterial diversity. Bacterial community structure significantly correlated with heavy metal content. The microbial covariance network demonstrated more coexistence than exclusion among bacterial taxa. This study revealed heavy metal pollution characteristics in Caohai wetland sediments and provided a theoretical basis for ecological risk assessment and microbial remediation of heavy metal contamination in karst wetlands.
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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