Methanogenesis sustained by sulfide weathering during the Great Oxidation Event

Wang, Shui‐Jiong; Rudnick, Roberta L.; Gaschnig, Richard M.; Wang, Hao; Wasylenki, Laura E.

doi:10.1038/s41561-019-0320-z

Cited by 53 publications

(34 citation statements)

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“…In this scenario, high organic matter production would be induced by intense continental weathering, while decomposition of primarily produced organic matter depleted O 2 in seawater and allowed active MSR in the water column, sustaining the sulfidic conditions 7 . Methyl sulfide formed in sulfidic seawater may function as a noncompetitive substrate for methanogens [61][62][63][64] . Active methanogenesis might also contribute to the organic matter production within sulfidic water column and sustain MIR in sediment porewater by providing additional organic substrate.…”

Section: Discussionmentioning

confidence: 99%

“…with Fe/Ni, Zn/Ni, Ca/Ni, and Mg/Ni <0.01 was analyzed on a Nu plasma II High Resolution Multi-Collector ICP-MS at State Key Laboratory of Environmental Geochemistry in Institute of Geochemistry, Chinese Academy of Sciences, Guiyang. Faraday cups L5, L4, L2, AX, H2, H4, H6, H7, and H8 are used to collect 57 Fe, 58 (Fe, Ni), 59 Co, 60 Ni, 61 Ni, 62 Ni, 63 Cu, 64 (Ni, Zn), 65 Cu, and 66 Zn, respectively. The isobaric interference from 58 Fe and 64 Zn were corrected by 57 Fe and 66 Zn, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Active methanogenesis during the melting of Marinoan snowball Earth

et al. 2021

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Geological evidence indicates that the deglaciation of Marinoan snowball Earth ice age (~635 Myr ago) was associated with intense continental weathering, recovery of primary productivity, transient marine euxinia, and potentially extensive CH4 emission. It is proposed that the deglacial CH4 emissions may have provided positive feedbacks for ice melting and global warming. However, the origin of CH4 remains unclear. Here we report Ni isotopes (δ60Ni) and Yttrium-rare earth element (YREE) compositions of syndepositional pyrites from the upper most Nantuo Formation (equivalent deposits of the Marinoan glaciation), South China. The Nantuo pyrite displays anti-correlations between Ni concentration and δ60Ni, and between Ni concentration and Sm/Yb ratio, suggesting mixing between Ni in seawater and Ni from methanogens. Our study indicates active methanogenesis during the termination of Marinoan snowball Earth. This suggests that methanogenesis was fueled by methyl sulfides produced in sulfidic seawater during the deglacial recovery of marine primary productivity.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Active methanogenesis during the melting of Marinoan snowball Earth

et al. 2021

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“…In diamictites, which are suggested to represent the chemical weathering residues of the UCC. They find a small shift towards heavier Ni isotope compositions across the Great Oxidation Event, which they relate to the onset of oxidative weathering of crustal sulfides (Wang et al, 2019c). Combined with the proposed importance of Ni to the maintenance of methanogenesis during this time period (e.g.…”

Section: Physical Processes Are Similarly Influential In Mediating Thmentioning

confidence: 92%

Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data

Horner

Little

Conway

et al. 2020

Preprint

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The ocean plays host to three carbon 'pumps' that redistribute climatically-significant quantities of carbon dioxide (CO2) from the atmosphere to the ocean interior and seafloor (Volk & Hoffert, 1985). These ocean carbon pumps-biological, carbonate, and solubility-influence Earth's climate over timescales ranging from decades to millions of years (e.g., Volk & Hoffert, 1985; Sigman et al., 2010; Khatiwala et al., 2019). The biological pump is of particular interest as it connects the cycles of C to those of O2, (micro)nutrients, and marine biology, and today accounts for as much as 70 % of the 'contribution ' of all three carbon pumps (Sarmiento & Gruber, 2006). The biological pump redistributes atmospheric carbon in two steps. First, phytoplankton, photoautotrophic microbes, use sunlight to transform ambient DIC (dissolved inorganic carbon) into POC (particulate organic carbon), represented here by CO2 and glucose, respectively, by the simplified reaction: CO2 + H2O + hv → CH2O + O2 [1] The second step requires that some fraction of the newly-formed POC sinks into the ocean interior through a combination of biological and physical aggregation processes (e.g., Alldredge & Silver 1988). The resulting surface ocean DIC deficit promotes the invasion of atmospheric CO2 into seawater to maintain air-sea CO2 equilibrium, driving an overall reduction in atmospheric pCO2. (This definition of the biological pump neglects dissolved organic carbon export, which is comparatively understudied, though may account for as much as one-third of C export; e.g., Carlson et al., 2010; Giering et al., 2014.) Importantly, Reaction [1] requires sunlight and can only occur in the euphotic layer of the ocean. In contrast, aerobic heterotrophic respiration can occur wherever POC and O2 are present: CH2O + O2 → CO2 + H2O [2] (There are a number of O2-independent respiration pathways that are reviewed in detail elsewhere; e.g., Froelich et al., 1979.) While the representation of all POC as glucose (CH2O) is instructive for illustrating an important biotic transformation in the ocean, it is also simplistic; microbial biomass consists of dozens of bioactive elements that serve many essential functions (e.g., da Silva & Williams, 1991). The elemental stoichiometry of POC can thus be expanded to include a number of major and micronutrient elements, as illustrated by the extended Redfield ratio reported by Ho et al.

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“…Notably, its role was essential as a metal cofactor in the metabolism of methanogenic archaea . The “nickel famine” theory has been proposed to play a central role in evolution: it correlates the great oxidation event (GEO) with a drastic reduction of nickel flux in archean oceans, consequent to the cooling of the upper‐mantle and the decreased eruption of nickel‐rich ultramafic rocks, which would have starved the major oceanic microbial community, the methanogens . Their decline left space for the proliferation of other microorganisms, especially oceanic cyanobacteria, that did not require as much nickel.…”

Section: Introductionmentioning

confidence: 99%

Structure, function, and biosynthesis of nickel‐dependent enzymes

Alfano

Cavazza

2020

Protein Science

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Nickel enzymes, present in archaea, bacteria, plants, and primitive eukaryotes are divided into redox and nonredox enzymes and play key functions in diverse metabolic processes, such as energy metabolism and virulence. They catalyze various reactions by using active sites of diverse complexities, such as mononuclear nickel in Ni-superoxide dismutase, glyoxylase I and acireductone dioxygenase, dinuclear nickel in urease, heteronuclear metalloclusters in[NiFe]-carbon monoxide dehydrogenase, acetyl-CoA decarbonylase/synthase and [NiFe]-hydrogenase, and even more complex cofactors in methyl-CoM reductase and lactate racemase. The presence of metalloenzymes in a cell necessitates a tight regulation of metal homeostasis, in order to maintain the appropriate intracellular concentration of nickel while avoiding its toxicity. As well, the biosynthesis and insertion of nickel active sites often require specific and elaborated maturation pathways, allowing the correct metal to be delivered and incorporated into the target enzyme. In this review, the phylogenetic distribution of nickel enzymes will be briefly described. Their tridimensional structures as well as the complexity of their active sites will be discussed. In view of the latest findings on these enzymes, a special focus will be put on the biosynthesis of their active sites and nickel activation of apo-enzymes. K E Y W O R D S enzyme maturation, metallocluster, metalloenzymes, nickel active site, redox enzymes

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Methanogenesis sustained by sulfide weathering during the Great Oxidation Event

Cited by 53 publications

References 50 publications

Active methanogenesis during the melting of Marinoan snowball Earth

Active methanogenesis during the melting of Marinoan snowball Earth

Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data

Structure, function, and biosynthesis of nickel‐dependent enzymes

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