Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin
The Han River, a key water source for China’s South-to-North Water Diversion Project, faces ecological challenges due to urbanization-driven heavy metal pollution and eutrophication. This study analyzed microbial communities in sediment samples from 15 sites using 16S rDNA sequencing. Our findings r...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X25000378 |
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| author | Fei Xiong Cejia Yao Dongdong Zhai Hongyan Liu Wang Dong Yuanyuan Chen |
| author_facet | Fei Xiong Cejia Yao Dongdong Zhai Hongyan Liu Wang Dong Yuanyuan Chen |
| author_sort | Fei Xiong |
| collection | DOAJ |
| description | The Han River, a key water source for China’s South-to-North Water Diversion Project, faces ecological challenges due to urbanization-driven heavy metal pollution and eutrophication. This study analyzed microbial communities in sediment samples from 15 sites using 16S rDNA sequencing. Our findings revealed a significant decrease in α-diversity with increasing copper (Cu) concentration, with the downstream region (group L) exhibiting higher diversity compared to the upstream region (group U). Group U was dominated by Alphaproteobacteria, while Clostridia prevailed in groups M and L. Analysis of β-nearest taxon index (βNTI) indicated that stochastic processes primarily shaped community assembly. Redundancy analysis (RDA) identified Cu, Fe, and Cr as key environmental factors influencing bacterial community composition in group U, while COD, Chl_a, pH, TN, and TP affected groups M and L. The study emphasizes the importance of addressing heavy metal pollution in eutrophic waters to protect microbial community diversity. |
| format | Article |
| id | doaj-art-7d6866033bbd4ecd90a188dda548615e |
| institution | Kabale University |
| issn | 1470-160X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj-art-7d6866033bbd4ecd90a188dda548615e2025-01-31T05:10:53ZengElsevierEcological Indicators1470-160X2025-01-01170113108Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basinFei Xiong0Cejia Yao1Dongdong Zhai2Hongyan Liu3Wang Dong4Yuanyuan Chen5Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaHubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaHubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaHubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaHubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaCorresponding author.; Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River Basin, College of Life Sciences, Jianghan University, Wuhan, ChinaThe Han River, a key water source for China’s South-to-North Water Diversion Project, faces ecological challenges due to urbanization-driven heavy metal pollution and eutrophication. This study analyzed microbial communities in sediment samples from 15 sites using 16S rDNA sequencing. Our findings revealed a significant decrease in α-diversity with increasing copper (Cu) concentration, with the downstream region (group L) exhibiting higher diversity compared to the upstream region (group U). Group U was dominated by Alphaproteobacteria, while Clostridia prevailed in groups M and L. Analysis of β-nearest taxon index (βNTI) indicated that stochastic processes primarily shaped community assembly. Redundancy analysis (RDA) identified Cu, Fe, and Cr as key environmental factors influencing bacterial community composition in group U, while COD, Chl_a, pH, TN, and TP affected groups M and L. The study emphasizes the importance of addressing heavy metal pollution in eutrophic waters to protect microbial community diversity.http://www.sciencedirect.com/science/article/pii/S1470160X25000378Han RiverBacterial communityCommunity assemblyHeavy metal pollutionEutrophication |
| spellingShingle | Fei Xiong Cejia Yao Dongdong Zhai Hongyan Liu Wang Dong Yuanyuan Chen Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin Ecological Indicators Han River Bacterial community Community assembly Heavy metal pollution Eutrophication |
| title | Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin |
| title_full | Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin |
| title_fullStr | Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin |
| title_full_unstemmed | Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin |
| title_short | Heavy metal contamination and eutrophication effects on bacterial communities in the Han River basin |
| title_sort | heavy metal contamination and eutrophication effects on bacterial communities in the han river basin |
| topic | Han River Bacterial community Community assembly Heavy metal pollution Eutrophication |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X25000378 |
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