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The quantitative significance of Syntrophaceae and syntrophic partnerships in methanogenic degradation of crude oil alkanes
TLDR
Libraries of 16S rRNA genes cloned from methanogenic oil degrading microcosms amended with North Sea crude oil and inoculated with estuarine sediment indicated that bacteria from the genera Smithella and Marinobacter were enriched during degradation.
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N2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone
TLDR
Chemical and molecular analyses reveal that trace levels of oxygen inhibit nitrate formation, largely preventing microbial N2 production in the Bay of Bengal.
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Oxygen minimum zone cryptic sulfur cycling sustained by offshore transport of key sulfur oxidizing bacteria
TLDR
The authors combine oceanography, molecular, biogeochemical and single-cell techniques to examine the distribution and metabolic capacity of SUP05 in Peru Upwelling waters, finding a single SUP05 species, UThioglobus perditus, was found to be abundant and active in both sulfidic shelf and sulfide-free offshore OMZ waters.
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Acetate Production from Oil under Sulfate-Reducing Conditions in Bioreactors Injected with Sulfate and Nitrate
ABSTRACT Oil production by water injection can cause souring in which sulfate in the injection water is reduced to sulfide by resident sulfate-reducing bacteria (SRB). Sulfate (2 mM) in medium…
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Arcobacter peruensis sp. nov., a Chemolithoheterotroph Isolated from Sulfide- and Organic-Rich Coastal Waters off Peru
TLDR
Genomic analysis showed that A. peruensis possesses genes encoding sulfide oxidation and denitrification pathways but lacks the ability to fix CO2 via autotrophic carbon fixation pathways, which may allow this Arcobacter species to rapidly bloom in eutrophic and sulfide-rich waters off the coast of Peru.
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N 2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans
Abstract. Recent modeling results suggest that oceanic oxygen levels will decrease significantly over the next decades to centuries in response to climate change and altered ocean circulation. Hence,…
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Improving PCR efficiency for accurate quantification of 16S rRNA genes.
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Microbial community succession in a bioreactor modeling a souring low-temperature oil reservoir subjected to nitrate injection
TLDR
The results indicated a succession of microbial communities along the bioreactor flow path, with nitrate-reducing Arcobacter and Pseudomonas species located from 0 to 3.2 cm and throughout, respectively.
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Metabolic versatility of a novel N2‐fixing Alphaproteobacterium isolated from a marine oxygen minimum zone
TLDR
A novel heterotrophic diazotroph isolated from the oxygen minimum zone (OMZ) off Peru belongs to the genus Sagittula and its capability to fix N2 was confirmed in laboratory experiments and genome sequencing revealed that it is a strict heterotroph with a high versatility in substrate utilization and energy acquisition mechanisms.
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