Seasonal and short-term variations of bacteria and pathogenic bacteria on road deposited sediments

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

Abstract

The bacteria (including pathogenic bacteria) attached to road deposited sediments (RDS) may interrelate with the microbe in the atmosphere, soil and water through resuspension and wash-off, and is of great significance to human and ecological health. However, the characteristics of bacterial communities with different time scale on RDS were unknown to dates. Climate change prolonged the dry days between rain events in many areas, making the varied trend of bacterial communities might be more significant in short term. This study revealed the characteristics of bacterial communities on RDS in urban and suburban areas through seasonal and daily scale. The correlations between other factors (land use, particle size, and chemical components) and the bacterial communities were also analyzed. It was found that the season showed a higher association with the bacterial community diversity than land use and particle size in urban areas. The bacterial community diversity increased substantially throughout the short-term study period (41 days) and the variation of dominant bacteria could be fitted by quadratic function in suburbs. In addition, urbanization notably increased the bacterial community diversity, while the potential pathogenic bacteria were more abundant in the suburban areas, coarse RDS (>75 μm), and in spring. The chemical components on RDS showed special correlations with the relative abundance of dominant bacteria. The research findings would fill the knowledge gap on RDS bacterial communities and be helpful for the future research on the assembly process of bacterial communities.

Bibliographic note

Funding Information: This work was supported by the Major Science and Technology Program for Water Pollution Control and Treatment ( 2017ZX07106001 ). IL acknolwedges financial support from the UoB Institute of Global Innovation emerging theme on Environmental Pollution Solutions (project no. 2076 ). The Nankai-UoB Joint Research Institute on Green Growth is acknowledged for support of staff exchange and discussions.

Details

Original languageEnglish
Article number111903
Number of pages12
JournalEnvironmental Research
Volume204
Issue numberPart A
Early online date26 Aug 2021
Publication statusE-pub ahead of print - 26 Aug 2021

Keywords

  • Road deposited sediments (RDS), Bacterial communities, Potential pathogenic bacteria, Spatiotemporal variations, Environmental factors