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Changes of Bacterial Communities in Response to Prolonged Hydrodynamic Disturbances in the Eutrophic Water-Sediment Systems

Author

Listed:
  • Haomiao Cheng

    (School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Ling Cheng

    (School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Liang Wang

    (School of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Tengyi Zhu

    (School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Wei Cai

    (School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Zulin Hua

    (Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China)

  • Yulin Wang

    (School of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Wenfen Wang

    (School of Construction Equipment and Municipal Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221008, China)

Abstract

The effects of hydrodynamic disturbances on the bacterial communities in eutrophic aquatic environments remain poorly understood, despite their importance to ecological evaluation and remediation. This study investigated the evolution of bacterial communities in the water–sediment systems under the influence of three typical velocity conditions with the timescale of 5 weeks. The results demonstrated that higher bacterial diversity and notable differences were detected in sediment compared to water using the 16S rRNA gene sequencing. The phyla Firmicutes and γ-Proteobacteria survived better in both water and sediment under stronger water disturbances. Their relative abundance peaked at 36.0%, 33.2% in water and 38.0%, 43.6% in sediment, respectively, while the phylum Actinobacteria in water had the opposite tendency. Its relative abundance grew rapidly in static control (SC) and peaked at 44.8%, and it almost disappeared in disturbance conditions. These phenomena were caused by the proliferation of genus Exiguobacterium (belonging to Firmicutes ), Citrobacter , Acinetobacter , Pseudomonas (belonging to γ-Proteobacteria ), and hgcI_clade (belonging to Actinobacteria ). The nonmetric multidimensional scaling (NMDS) and Venn analysis also revealed significantly different evolutionary trend in the three water-sediment systems. It was most likely caused by the changes of geochemical characteristics (dissolved oxygen (DO) and nutrients). This kind of study can provide helpful information for ecological assessment and remediation strategy in eutrophic aquatic environments.

Suggested Citation

  • Haomiao Cheng & Ling Cheng & Liang Wang & Tengyi Zhu & Wei Cai & Zulin Hua & Yulin Wang & Wenfen Wang, 2019. "Changes of Bacterial Communities in Response to Prolonged Hydrodynamic Disturbances in the Eutrophic Water-Sediment Systems," IJERPH, MDPI, vol. 16(20), pages 1-13, October.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:20:p:3868-:d:275825
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    References listed on IDEAS

    as
    1. Xia Luo & Xinyi Xiang & Guoyi Huang & Xiaorui Song & Peijia Wang & Kaidao Fu, 2019. "Bacterial Abundance and Physicochemical Characteristics of Water and Sediment Associated with Hydroelectric Dam on the Lancang River China," IJERPH, MDPI, vol. 16(11), pages 1-19, June.
    2. Lin Zhu & Xun Li & Chen Zhang & Zengqiang Duan, 2017. "Pollutants’ Release, Redistribution and Remediation of Black Smelly River Sediment Based on Re-Suspension and Deep Aeration of Sediment," IJERPH, MDPI, vol. 14(4), pages 1-10, April.
    3. Akebe Luther King Abia & Chris James & Eunice Ubomba-Jaswa & Maggy Ndombo Benteke Momba, 2017. "Microbial Remobilisation on Riverbed Sediment Disturbance in Experimental Flumes and a Human-Impacted River: Implication for Water Resource Management and Public Health in Developing Sub-Saharan Afric," IJERPH, MDPI, vol. 14(3), pages 1-18, March.
    4. Yong Li & Jiejie Zhang & Jianqiang Zhang & Wenlai Xu & Zishen Mou, 2019. "Microbial Community Structure in the Sediments and Its Relation to Environmental Factors in Eutrophicated Sancha Lake," IJERPH, MDPI, vol. 16(11), pages 1-15, May.
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