CH 4 -consuming microorganisms and the formation of carbonate crusts at cold seeps

Aloisi, Giovanni; Bouloubassi, Ioanna; Heijs, Sander K.; Pancost, Richard D.; Cartigny, Pierre; Damsté, Jaap S. Sinninghe; Gottschal, Jan C.; Forney, Larry J.; Rouchy, Jean-Marie

doi:10.1016/s0012-821x(02)00878-6

Cited by 295 publications

(208 citation statements)

References 32 publications

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“…(Sibuet and Olu, 1998). Carbonate crusts (which can include calcite and dolomite) are also known to form in cold seep regions (Aloisi et al, 2000;Aloisi et al, 2002;Luff et al, 2004).…”

Section: Hydrothermal Vents and Cold Seepsmentioning

confidence: 99%

Laser Raman spectroscopy as a technique for identification of seafloor hydrothermal and cold seep minerals

2009

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“…(Sibuet and Olu, 1998). Carbonate crusts (which can include calcite and dolomite) are also known to form in cold seep regions (Aloisi et al, 2000;Aloisi et al, 2002;Luff et al, 2004).…”

Section: Hydrothermal Vents and Cold Seepsmentioning

confidence: 99%

Laser Raman spectroscopy as a technique for identification of seafloor hydrothermal and cold seep minerals

2009

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“…Because archaeal anaerobic methanotrophy results in highly 13 C-depleted lipids, monocyclic MDGD is derived from methanotrophic archaea [54]. This type of archaea biosynthesize structurally related GDGTs containing biphytane chains with one or two cyclopentane rings [48,56,57]. The thermophilic methanogen Methanococcus jannaschii is the only archaeon known to contain the macrocyclic diether as its core membrane lipid [58].…”

Section: Identification Of Aom Lipid Biomarkersmentioning

confidence: 99%

Glycerol ether biomarkers and their carbon isotopic compositions in a cold seep carbonate chimney from the Shenhu area, northern South China Sea

Jiang

Yang

et al. 2011

Chin. Sci. Bull.

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At modern cold seeps, the anaerobic oxidation of methane (AOM) is the dominant pathway for methane consumption in marine sediments. AOM, which is mediated by a consortium of methane oxidizing archaea and sulfate reducing bacteria, is proposed to be responsible for authigenic carbonate formation. A methane-derived carbonate chimney was collected from the Shenhu area, northern South China Sea. The membrane lipids and their very low carbon isotopic compositions (115‰ to 104‰) in the Shenhu chimney suggest the presence of an AOM process. Three specific archaeal and bacterial biomarkers were detected, including Ar, DAGE 1f, and monocyclic MDGD. Their strongly depleted   13 C values (115‰ to 104‰), which are lower than those of the normal marine lipids in sediments, reveal biogenic methane as their origin. The carbonate deposits exhibiting a chimney structure indicate that a vigorous methane-rich fluid expulsion may have occurred at the seafloor. We propose that the decomposition of gas hydrates at depth is the likely cause of seepage and cold seep carbonate formation in the Shenhu area.

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“…In select seep settings along continental margins and submarine mud volcanoes, archaeal 16S ribosomal RNA gene surveys and lipid biomarker analyses of carbonate crusts provided evidence of methanotrophic microbial biosignatures 20 . Within porous Hydrate Ridge chemoherms experiencing focused fluid flow, isotopic links between AOM and carbonates were reported, as were putative fossilized microbial filaments 6 .…”

mentioning

confidence: 99%

“…The conditions in which microbial AOM has been suggested to occur alongside carbonate precipitation products [18][19][20][21] represent an end-member of potential endolithic habitats: settings with high connectivity to metabolic reactants (for example, methane and sulphate) and seemingly minor physicochemical or energetic obstacles to sulphate-dependent AOM. Well-lithified massive carbonate rocks that pave substantial areas of the seafloor associated with present and past methane seepage, as well as those precipitates found in areas of low seepage activity, represent unique endolithic habitats more constrained by permeability limitations and/or methane supply; the potential of methanotrophic activity in such settings warrants investigation.…”

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confidence: 99%

Carbonate-hosted methanotrophy represents an unrecognized methane sink in the deep sea

et al. 2014

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The atmospheric flux of methane from the oceans is largely mitigated through microbially mediated sulphate-coupled methane oxidation, resulting in the precipitation of authigenic carbonates. Deep-sea carbonates are common around active and palaeo-methane seepage, and have primarily been viewed as passive recorders of methane oxidation; their role as active and unique microbial habitats capable of continued methane consumption has not been examined. Here we show that seep-associated carbonates harbour active microbial communities, serving as dynamic methane sinks. Microbial aggregate abundance within the carbonate interior exceeds that of seep sediments, and molecular diversity surveys reveal methanotrophic communities within protolithic nodules and well-lithified carbonate pavements. Aggregations of microbial cells within the carbonate matrix actively oxidize methane as indicated by stable isotope FISH-nanoSIMS experiments and 14 CH 4 radiotracer rate measurements. Carbonate-hosted methanotrophy extends the known ecological niche of these important methane consumers and represents a previously unrecognized methane sink that warrants consideration in global methane budgets.

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CH 4 -consuming microorganisms and the formation of carbonate crusts at cold seeps

Cited by 295 publications

References 32 publications

Laser Raman spectroscopy as a technique for identification of seafloor hydrothermal and cold seep minerals

Laser Raman spectroscopy as a technique for identification of seafloor hydrothermal and cold seep minerals

Glycerol ether biomarkers and their carbon isotopic compositions in a cold seep carbonate chimney from the Shenhu area, northern South China Sea

Carbonate-hosted methanotrophy represents an unrecognized methane sink in the deep sea

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