Methanotrophic potential of Dutch canal wall biofilms is driven by Methylomonadaceae

Pelsma, Koen AJ, Verhagen, Daniel AM, Dean, Joshua F ORCID: 0000-0001-9058-7076, Jetten, Mike SM and Welte, Cornelia U (2023) Methanotrophic potential of Dutch canal wall biofilms is driven by Methylomonadaceae. FEMS MICROBIOLOGY ECOLOGY, 99 (10). fiad110-.

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Official URL: http://dx.doi.org/10.1093/femsec/fiad110

Abstract

Global urbanization of waterways over the past millennium has influenced microbial communities in these aquatic ecosystems. Increased nutrient inputs have turned most urban waters into net sources of the greenhouse gases carbon dioxide (CO2) and methane (CH4). Here, canal walls of five Dutch cities were studied for their biofilm CH4 oxidation potential, alongside field observations of water chemistry, and CO2 and CH4 emissions. Three cities showed canal wall biofilms with relatively high biological CH4 oxidation potential up to 0.48 mmol gDW-1 d-1, whereas the other two cities showed no oxidation potential. Salinity was identified as the main driver of biofilm bacterial community composition. Crenothrix and Methyloglobulus methanotrophs were observed in CH4-oxidizing biofilms. We show that microbial oxidation in canal biofilms is widespread and is likely driven by the same taxa found across cities with distinctly different canal water chemistry. The oxidation potential of the biofilms was not correlated with the amount of CH4 emitted but was related to the presence or absence of methanotrophs in the biofilms. This was controlled by whether there was enough CH4 present to sustain a methanotrophic community. These results demonstrate that canal wall biofilms can directly contribute to the mitigation of greenhouse gases from urban canals.

Item Type:	Article
Uncontrolled Keywords:	climate change microbiology, eutrophication, greenhouse gases, Methyloglobulus, microbial community, urban waterways
Divisions:	Faculty of Science and Engineering > School of Environmental Sciences
Depositing User:	Symplectic Admin
Date Deposited:	10 Nov 2023 15:38
Last Modified:	10 Nov 2023 15:38
DOI:	10.1093/femsec/fiad110
Open Access URL:	https://doi.org/10.1093/femsec/fiad110
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3176731