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

Haomiao Cheng, Ling Cheng, Liang Wang, Tengyi Zhu, Wei Cai, Zulin Hua, Yulin Wang and Wenfen Wang
Additional contact information
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

IJERPH, 2019, vol. 16, issue 20, 1-13

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.

Keywords: bacterial community; water disturbance; 16S rRNA; dissolved oxygen; nutrients; resuspension; racetrack-style flume; lake Chaohu; Exiguobacterium; hgcI_clade (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1660-4601/16/20/3868/pdf (application/pdf)
https://www.mdpi.com/1660-4601/16/20/3868/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:16:y:2019:i:20:p:3868-:d:275825

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().