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Increasing sulfate levels show a differential impact on synthetic communities comprising different methanogens and a sulfate reducer

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Chen, Jing, Wade, Matthew J., Dolfing, Jan and Soyer, Orkun S. (2019) Increasing sulfate levels show a differential impact on synthetic communities comprising different methanogens and a sulfate reducer. Journal of The Royal Society Interface, 16 (154). 20190129. doi:10.1098/rsif.2019.0129

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Official URL: https://doi.org/10.1098/rsif.2019.0129

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Abstract

Methane producing microbial communities are of ecological and biotechnological interest. Syntrophic interactions among sulphate reducers and aceto/hydrogenotrophic and obligate hydrogenotrophic methanogens form a key component of these communities, yet, the impact of these different syntrophic routes on methane production and their stability against sulphate availability are not well understood. Here, we construct model synthetic communities using a sulphate reducer and two types of methanogens representing different methanogenesis routes. We find that tri-cultures with both routes increase methane production by almost two-fold compared to co-cultures, and are stable in the absence of sulphate. With increasing sulphate, system stability and productivity decreases, and does so faster in communities with aceto/hydrogenotrophic methanogens despite the continued presence of acetate. We show that this is due to a shift in these methanogens’ metabolism towards co-utilisation of hydrogen with acetate. These findings indicate the important role of hydrogen dynamics in the stability and productivity of syntrophic communities.

Item Type: Journal Article
Alternative Title: Increasing sulphate levels show a differential impact on synthetic communities comprising different methanogens and a sulphate reducer
Subjects: Q Science > QR Microbiology
Divisions: Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH): Microorganisms, Methane
Journal or Publication Title: Journal of The Royal Society Interface
Publisher: The Royal Society Publishing
ISSN: 1742-5689
Official Date: May 2019
Dates:
DateEvent
May 2019Published
8 May 2019Available
8 April 2019Accepted
Volume: 16
Number: 154
Article Number: 20190129
DOI: 10.1098/rsif.2019.0129
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
BB/K003240/2[BBSRC] Biotechnology and Biological Sciences Research Councilhttp://dx.doi.org/10.13039/501100000268
BB/M017982/1[BBSRC] Biotechnology and Biological Sciences Research Councilhttp://dx.doi.org/10.13039/501100000268
UNSPECIFIEDUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741

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