ArticleFEMS microbiology ecology2021
Indigenous microbial communities in heavy oil show a threshold response to salinity.
Article in FEMS microbiology ecology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Article
- Coexistence of methanogenesis and sulfate reduction in a sulfate-adapted enrichment culture from an oil reservoir.Applied and environmental microbiology · 2025Article
- Imprints of ecological processes in the taxonomic core community: an analysis of naturally replicated microbial communities enclosed in oil.FEMS microbiology ecology · 2024Article
- Assessing anaerobic microbial degradation rates of crude light oil with reverse stable isotope labelling and community analysis.Frontiers in microbiomes · 2024Article
- Inhibition of sulfate-reducing bacteria with formate.FEMS microbiology ecology · 2022Article
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11 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Microbial degradation influences the quality of oil resources. The environmental factors that shape the composition of oil microbial communities are largely unknown because most samples from oil fields are impacted by anthropogenic oil production, perturbing the native ecosystem with exogenous fluids and microorganisms. We investigated the relationship between formation water geochemistry and microbial community composition in undisturbed oil samples. We isolated 43 microliter-sized water droplets naturally enclosed in the heavy oil of the Pitch Lake, Trinidad and Tobago. The water chemistry and microbial community composition within the same water droplet were determined by ion chromatography and 16S rRNA gene amplicon sequencing, respectively. The results revealed a high variability in ion concentrations and community composition between water droplets. Microbial community composition was mostly affected by the chloride concentration, which ranged from freshwater to brackish-sea water. Remarkably, microbial communities did not respond gradually to increasing chloride concentration but showed a sudden change to less diverse and uneven communities when exceeding a chloride concentration of 57.3 mM. The results reveal a threshold-regulated response of microbial communities to salinity, offering new insights into the microbial ecology of oil reservoirs.
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