Microbial community composition and function in an urban waterway with combined sewer overflows before and after implementation of a stormwater storage pipe.

ABSTRACT: When the wastewater volume exceeds the sewer pipe capacity during extreme rainfall events, untreated sewage discharges directly into rivers as combined sewer overflow (CSO). To compare the impacts of CSOs and stormwater on urban waterways, we assessed physicochemical water quality, the 16S rRNA gene-based bacterial community structure, and EcoPlate-based microbial functions during rainfall periods in an urban waterway before and after a stormwater storage pipe was commissioned. A temporal variation analysis showed that CSOs have significant impacts on microbial function and bacterial community structure, while their contributions to physicochemical parameters, bacterial abundance, and chlorophyll a were not confirmed. Heat map analysis showed that the impact of CSO on the waterway bacteria

SUBMITTER: Matsui K 

PROVIDER: S-EPMC9840855 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature