The Baltic Sea methane pockmark microbiome: The new insights into the patterns of relative abundance and ANME niche separation

Ясаков, Т. Р.; Kanapatskiy, T. A.; Toshchakov, Stepan V.; Korzhenkov, Aleksei A.; Ulyanova, Marina; Pimenov, Nikolai V.

doi:10.1016/j.marenvres.2021.105533

Cited by 22 publications

(9 citation statements)

References 55 publications

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“…Both indicators are typical of methanotrophic Methanosarcinales of the subgroup ANME-2 (Hinrichs et al, 2000;Niemann and Elvert, 2008) (Table 2). ANME-2 are commonly found in cold seep environments with a shallow SMTZ associated with aragonite MDACs, whereas ANME-1 are found at greater depths typically associated with high-Mg calcite mineralogies (Peckmann et al, 2009;Guan et al, 2016;Yao et al, 2021;Iasakov et al, 2022). The syntrophic sulfatereducing partner of ANME-2 belongs to the Desulfosarcina/ Desulfococcus Seep-SRB1 cluster based on the ai-C 15:0 /i-C 15:0 value <2 (Niemann and Elvert, 2008;Yao et al, 2021).…”

Section: Biogeochemistry Of Methane-derived Carbonates At Lfcmentioning

confidence: 99%

Biogeochemistry and timing of methane-derived carbonate formation at Leirdjupet fault complex, SW Barents sea

et al. 2022

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The origin of modern seafloor methane emissions in the Barents Sea is tightly connected to the glacio-tectonic and oceanographic transformations following the last ice age. Those regional events induced geological structure re-activation and destabilization of gas hydrate reservoirs over large areas of the European continental margins, sustaining widespread fluid plumbing systems. Despite the increasing number of new active seep discoveries, their accurate geochronology and paleo-dynamic is still poorly resolved, thus hindering precise identification of triggering factors and mechanisms controlling past and future seafloor emissions. Here, we report the distribution, petrographic (thin section, electron backscatter diffraction), isotopic (δ13C, δ18O) and lipid biomarker composition of methane-derived carbonates collected from Leirdjupet Fault Complex, SW Barents Sea, at 300 m depth during an ROV survey in 2021. Carbonates are located inside a 120 x 220 m elongated pockmark and form <10 m2 bodies protruding for about 2 m above the adjacent seafloor. Microstructural analyses of vein-filling cements showed the occurrence of three–five generations of isopachous aragonitic cement separated by dissolution surfaces indicative of intermittent oxidizing conditions. The integration of phase-specific isotopic analysis and U/Th dating showed δ13C values between −28.6‰ to −10.1‰ and δ18O between 4.6‰ and 5.3‰, enabling us to track carbonate mineral precipitation over the last ∼8 ka. Lipid biomarkers and their compound-specific δ13C analysis in the bulk carbonate revealed the presence of anaerobic methanotrophic archaea of the ANME-2 clade associated with sulfate-reducing bacteria of the Seep-SRB1 clade, as well as traces of petroleum. Our results indicate that methane and petroleum seepage in this area followed a similar evolution as in other southernmost Barents Sea sites controlled by the asynchronous deglaciation of the Barents Sea shelf, and that methane-derived carbonate precipitation is still an active process at many Arctic locations.

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Section: Biogeochemistry Of Methane-derived Carbonates At Lfcmentioning

confidence: 99%

Biogeochemistry and timing of methane-derived carbonate formation at Leirdjupet fault complex, SW Barents sea

et al. 2022

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“…such as UnTr_Desulfobacteria. In support of AOM occurring in the unoxidized zone, MAG groups UnTr_GIF9 and UnTr_34-128 that aligned with the Dehalococcoidia and Caldatribacteriota, respectively strongly correlate with AOM rates in Baltic Sea sediments 74 .…”

Section: Discussionmentioning

confidence: 81%

Gallionella and Sulfuricella populations are dominant during the transition of boreal potential to actual acid sulfate soils

Högfors‐Rönnholm

Lundin

Brambilla

et al. 2022

Commun Earth Environ

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Acid sulfate soils release metal laden, acidic waters that affect the environment, buildings, and human health. In this study, 16S rRNA gene amplicons, metagenomes, and metatranscriptomes all demonstrated distinct microbial communities and activities in the unoxidized potential acid sulfate soil, the overlying transition zone, and uppermost oxidized actual acid sulfate soil. Assembled genomes and mRNA transcripts also suggested abundant oxidized acid sulfate soil populations that aligned within the Gammaproteobacteria and Terracidiphilus. In contrast, potentially acid tolerant or moderately acidophilic iron oxidizing Gallionella and sulfur metabolizing Sulfuricella dominated the transition zone during catalysis of metal sulfide oxidation to form acid sulfate soil. Finally, anaerobic oxidation of methane coupled to nitrate, sulfate, and ferric reduction were suggested to occur in the reduced parent sediments. In conclusion, despite comparable metal sulfide dissolution processes e.g., biomining, Gallionella and Sulfuricella dominated the community and activities during conversion of potential to actual acid sulfate soils.

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“…Methanotrophic ANME archaea and sulfate-reducing bacteria form the trophic base of the seep communities; the predominance of specific ANME lineages depends on the physicochemical properties of the sediments and on the scale of gas emission. The physicochemical parameters of the habitats of ANME archaea determining the predominance of specific ANME clades are presently actively discussed in the literature [ 68 , 69 ]. Thus, the ANME-1 group predominates in the mats formed on coral-like structures at the sites of methane seep discharge into the anoxic Black Sea water column [ 70 ], in deep layers of Arctic sediments, where methane hydrates appear [ 71 ], and under conditions of low methane and sulfate concentrations in the methane-sulfide transition zone [ 72 ].…”

Section: Discussionmentioning

confidence: 99%

Biogeochemical Activity of Methane-Related Microbial Communities in Bottom Sediments of Cold Seeps of the Laptev Sea

et al. 2023

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Bottom sediments at methane discharge sites of the Laptev Sea shelf were investigated. The rates of microbial methanogenesis and methane oxidation were measured, and the communities responsible for these processes were analyzed. Methane content in the sediments varied from 0.9 to 37 µmol CH4 dm−3. Methane carbon isotopic composition (δ13C-CH4) varied from −98.9 to −77.6‰, indicating its biogenic origin. The rates of hydrogenotrophic methanogenesis were low (0.4–5.0 nmol dm−3 day−1). Methane oxidation rates varied from 0.4 to 1.2 µmol dm−3 day−1 at the seep stations. Four ANME methanotrophic lineages (1, 2a–2b, 2c, and 3) (Methanosarciniales, phylum Halobacterota) were predominant (up to 46.3% of the whole community). Aerobic ammonium-oxidizing Crenarchaeota (family Nitrosopumilaceae) predominated in the upper sediments. Most archaea (up to 8%) were represented by new lineages, for which the metabolic pathways are presently unknown. Predominant bacteria in the upper sediments were heterotrophic Actinobacteriota and Bacteroidota. Members of the genera Sulfurovum and Sulfurimonas occurred in the sediments of the seep stations. Mehtanotrophs of the classes Alphaproteobacteria (Methyloceanibacter) and Gammaproteobacteria (families Methylophilaceae and Methylomonadaceae) occurred in the sediments of all stations. The microbial community composition was similar to that of methane seep sediments from geographically remote areas of the global ocean.

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The Baltic Sea methane pockmark microbiome: The new insights into the patterns of relative abundance and ANME niche separation

Cited by 22 publications

References 55 publications

Biogeochemistry and timing of methane-derived carbonate formation at Leirdjupet fault complex, SW Barents sea

Biogeochemistry and timing of methane-derived carbonate formation at Leirdjupet fault complex, SW Barents sea

Gallionella and Sulfuricella populations are dominant during the transition of boreal potential to actual acid sulfate soils

Biogeochemical Activity of Methane-Related Microbial Communities in Bottom Sediments of Cold Seeps of the Laptev Sea

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