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Propionate Converting Anaerobic Microbial Communities Enriched from Distinct Biogeochemical Zones of Aarhus Bay, Denmark under Sulfidogenic and Methanogenic Conditions
Article

Butyrate Conversion by Sulfate-Reducing and Methanogenic Communities from Anoxic Sediments of Aarhus Bay, Denmark

1
Laboratory of Microbiology, Wageningen University & Research, 6708 WE Wageningen, The Netherlands
2
Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, P.O. Box 59, 1790 AB Den Burg, The Netherlands
3
Department of Environmental Science, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, USA
4
Faculty of Geosciences, Utrecht University, P.O. Box 80.021, 3508 TA Utrecht, The Netherlands
*
Author to whom correspondence should be addressed.
Microorganisms 2020, 8(4), 606; https://doi.org/10.3390/microorganisms8040606
Received: 27 March 2020 / Revised: 17 April 2020 / Accepted: 19 April 2020 / Published: 22 April 2020
(This article belongs to the Special Issue Anaerobes in Biogeochemical Cycles)
The conventional perception that the zone of sulfate reduction and methanogenesis are separated in high- and low-sulfate-containing marine sediments has recently been changed by studies demonstrating their co-occurrence in sediments. The presence of methanogens was linked to the presence of substrates that are not used by sulfate reducers. In the current study, we hypothesized that both groups can co-exist, consuming common substrates (H2 and/or acetate) in sediments. We enriched butyrate-degrading communities in sediment slurries originating from the sulfate, sulfate–methane transition, and methane zone of Aarhus Bay, Denmark. Sulfate was added at different concentrations (0, 3, 20 mM), and the slurries were incubated at 10 °C and 25 °C. During butyrate conversion, sulfate reduction and methanogenesis occurred simultaneously. The syntrophic butyrate degrader Syntrophomonas was enriched both in sulfate-amended and in sulfate-free slurries, indicating the occurrence of syntrophic conversions at both conditions. Archaeal community analysis revealed a dominance of Methanomicrobiaceae. The acetoclastic Methanosaetaceae reached high relative abundance in the absence of sulfate, while presence of acetoclastic Methanosarcinaceae was independent of the sulfate concentration, temperature, and the initial zone of the sediment. This study shows that there is no vertical separation of sulfate reducers, syntrophs, and methanogens in the sediment and that they all participate in the conversion of butyrate. View Full-Text
Keywords: marine sediment; sulfate-reducing bacteria; methanogenic archaea; syntrophy; intact polar lipids; Aarhus Bay marine sediment; sulfate-reducing bacteria; methanogenic archaea; syntrophy; intact polar lipids; Aarhus Bay
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MDPI and ACS Style

Ozuolmez, D.; Moore, E.K.; Hopmans, E.C.; Sinninghe Damsté, J.S.; Stams, A.J.M.; Plugge, C.M. Butyrate Conversion by Sulfate-Reducing and Methanogenic Communities from Anoxic Sediments of Aarhus Bay, Denmark. Microorganisms 2020, 8, 606. https://doi.org/10.3390/microorganisms8040606

AMA Style

Ozuolmez D, Moore EK, Hopmans EC, Sinninghe Damsté JS, Stams AJM, Plugge CM. Butyrate Conversion by Sulfate-Reducing and Methanogenic Communities from Anoxic Sediments of Aarhus Bay, Denmark. Microorganisms. 2020; 8(4):606. https://doi.org/10.3390/microorganisms8040606

Chicago/Turabian Style

Ozuolmez, Derya, Elisha K. Moore, Ellen C. Hopmans, Jaap S. Sinninghe Damsté, Alfons J.M. Stams, and Caroline M. Plugge 2020. "Butyrate Conversion by Sulfate-Reducing and Methanogenic Communities from Anoxic Sediments of Aarhus Bay, Denmark" Microorganisms 8, no. 4: 606. https://doi.org/10.3390/microorganisms8040606

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