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- W2621824871 abstract "For the anaerobic remineralization of organic matter in marine sediments, sulfate reduction coupled to fermentation plays a key role. Here, we enriched sulfate-reducing/fermentative communities from intertidal sediments under defined conditions in continuous culture. We transiently exposed the cultures to oxygen or nitrate twice daily and investigated the community response. Chemical measurements, provisional genomes and transcriptomic profiles revealed trophic networks of microbial populations. Sulfate reducers coexisted with facultative nitrate reducers or aerobes enabling the community to adjust to nitrate or oxygen pulses. Exposure to oxygen and nitrate impacted the community structure, but did not suppress fermentation or sulfate reduction as community functions, highlighting their stability under dynamic conditions. The most abundant sulfate reducer in all cultures, related to Desulfotignum balticum, appeared to have coupled both acetate- and hydrogen oxidation to sulfate reduction. We describe a novel representative of the widespread uncultured candidate phylum Fermentibacteria (formerly candidate division Hyd24-12). For this strictly anaerobic, obligate fermentative bacterium, we propose the name ‘USabulitectum silens’ and identify it as a partner of sulfate reducers in marine sediments. Overall, we provide insights into the function of fermentative, as well as sulfate-reducing microbial communities and their adaptation to a dynamic environment." @default.
- W2621824871 created "2017-06-15" @default.
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- W2621824871 date "2017-09-15" @default.
- W2621824871 modified "2023-10-16" @default.
- W2621824871 title "Transient exposure to oxygen or nitrate reveals ecophysiology of fermentative and sulfate-reducing benthic microbial populations" @default.
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- W2621824871 doi "https://doi.org/10.1111/1462-2920.13895" @default.
- W2621824871 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5763382" @default.
- W2621824871 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28836729" @default.
- W2621824871 hasPublicationYear "2017" @default.
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