scholarly journals Archaea catalyze iron-dependent anaerobic oxidation of methane

2016 ◽  
Vol 113 (45) ◽  
pp. 12792-12796 ◽  
Author(s):  
Katharina F. Ettwig ◽  
Baoli Zhu ◽  
Daan Speth ◽  
Jan T. Keltjens ◽  
Mike S. M. Jetten ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Ferrous Iron ◽  
Ferric Iron ◽  
Enrichment Culture ◽  
Biogeochemical Cycles ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane ◽  
Reducing Conditions ◽  
Nitrite Nitrate

Anaerobic oxidation of methane (AOM) is crucial for controlling the emission of this potent greenhouse gas to the atmosphere. Nitrite-, nitrate-, and sulfate-dependent methane oxidation is well-documented, but AOM coupled to the reduction of oxidized metals has so far been demonstrated only in environmental samples. Here, using a freshwater enrichment culture, we show that archaea of the order Methanosarcinales, related to “Candidatus Methanoperedens nitroreducens,” couple the reduction of environmentally relevant forms of Fe3+ and Mn4+ to the oxidation of methane. We obtained an enrichment culture of these archaea under anaerobic, nitrate-reducing conditions with a continuous supply of methane. Via batch incubations using [13C]methane, we demonstrated that soluble ferric iron (Fe3+, as Fe-citrate) and nanoparticulate forms of Fe3+ and Mn4+ supported methane-oxidizing activity. CO2 and ferrous iron (Fe2+) were produced in stoichiometric amounts. Our study connects the previous finding of iron-dependent AOM to microorganisms detected in numerous habitats worldwide. Consequently, it enables a better understanding of the interaction between the biogeochemical cycles of iron and methane.

scholarly journals Anaerobic oxidation of methane in grassland soils used for cattle husbandry

2012 ◽  
Vol 9 (10) ◽  
pp. 3891-3899 ◽  
Author(s):  
A. Bannert ◽  
C. Bogen ◽  
J. Esperschütz ◽  
A. Koubová ◽  
F. Buegger ◽  
...  
Keyword(s):  
Methane Oxidation ◽  
Enrichment Culture ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Incubation Experiment ◽  
Nutrient Source ◽  
Oxidation Activity ◽  
Oxidation Of Methane ◽  
Cattle Husbandry

Abstract. While the importance of anaerobic methane oxidation has been reported for marine ecosystems, the role of this process in soils is still questionable. Grasslands used as pastures for cattle overwintering show an increase in anaerobic soil micro-sites caused by animal treading and excrement deposition. Therefore, anaerobic potential methane oxidation activity of severely impacted soil from a cattle winter pasture was investigated in an incubation experiment under anaerobic conditions using 13C-labelled methane. We were able to detect a high microbial activity utilizing CH4 as nutrient source shown by the respiration of 13CO2. Measurements of possible terminal electron acceptors for anaerobic oxidation of methane were carried out. Soil sulfate concentrations were too low to explain the oxidation of the amount of methane added, but enough nitrate and iron(III) were detected. However, only nitrate was consumed during the experiment. 13C-PLFA analyses clearly showed the utilization of CH4 as nutrient source mainly by organisms harbouring 16:1ω7 PLFAs. These lipids were also found as most 13C-enriched fatty acids by Raghoebarsing et al. (2006) after addition of 13CH4 to an enrichment culture coupling denitrification of nitrate to anaerobic oxidation of methane. This might be an indication for anaerobic oxidation of methane by relatives of "Candidatus Methylomirabilis oxyfera" in the investigated grassland soil under the conditions of the incubation experiment.

The anaerobic oxidation of methane in paddy soil by ferric iron and nitrate, and the microbial communities involved

2021 ◽  
pp. 147773
Author(s):  
Dan Luo ◽  
Xiangtian Meng ◽  
Ningguo Zheng ◽  
Yaying Li ◽  
Huaiying Yao ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Paddy Soil ◽  
Ferric Iron ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

Simultaneous nitrate and sulfate dependent anaerobic oxidation of methane linking carbon, nitrogen and sulfur cycles

2021 ◽  
Vol 194 ◽  
pp. 116928
Author(s):  
Wen-Bo Nie ◽  
Jie Ding ◽  
Guo-Jun Xie ◽  
Xin Tan ◽  
Yang Lu ◽  
...  
Keyword(s):  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

scholarly journals Can anaerobic oxidation of methane prevent seafloor gas escape in a warming climate?

Solid Earth ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 1541-1554 ◽  
Author(s):  
Christian Stranne ◽  
Matt O'Regan ◽  
Martin Jakobsson ◽  
Volker Brüchert ◽  
Marcelo Ketzer
Keyword(s):  
Climate Warming ◽  
Future Climate ◽  
Hydraulic Fractures ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Warming Scenario ◽  
Oxidation Of Methane ◽  
Warming Climate ◽  
Continental Slopes ◽  
Fully Coupled

Abstract. Assessments of future climate-warming-induced seafloor methane (CH4) release rarely include anaerobic oxidation of methane (AOM) within the sediments. Considering that more than 90 % of the CH4 produced in ocean sediments today is consumed by AOM, this may result in substantial overestimations of future seafloor CH4 release. Here, we integrate a fully coupled AOM module with a numerical hydrate model to investigate under what conditions rapid release of CH4 can bypass AOM and result in significant fluxes to the ocean and atmosphere. We run a number of different model simulations for different permeabilities and maximum AOM rates. In all simulations, a future climate warming scenario is simulated by imposing a linear seafloor temperature increase of 3 ∘C over the first 100 years. The results presented in this study should be seen as a first step towards understanding AOM dynamics in relation to climate change and hydrate dissociation. Although the model is somewhat poorly constrained, our results indicate that vertical CH4 migration through hydraulic fractures can result in low AOM efficiencies. Fracture flow is the predicted mode of methane transport under warming-induced dissociation of hydrates on upper continental slopes. Therefore, in a future climate warming scenario, AOM might not significantly reduce methane release from marine sediments.

Archaeal lipids and anaerobic oxidation of methane in euxinic water columns: a comparative study of the Black Sea and Cariaco Basin

2004 ◽  
Vol 205 (3-4) ◽  
pp. 427-442 ◽  
Author(s):  
Stuart G Wakeham ◽  
Ellen C Hopmans ◽  
Stefan Schouten ◽  
Jaap S Sinninghe Damsté
Keyword(s):  
Comparative Study ◽  
Black Sea ◽  
Cariaco Basin ◽  
The Black Sea ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane ◽  
Water Columns ◽  
Archaeal Lipids

scholarly journals Effects of Temperature and Pressure on Sulfate Reduction and Anaerobic Oxidation of Methane in Hydrothermal Sediments of Guaymas Basin

2004 ◽  
Vol 70 (2) ◽  
pp. 1231-1233 ◽  
Author(s):  
Jens Kallmeyer ◽  
Antje Boetius
Keyword(s):  
Sulfate Reduction ◽  
Deep Sea ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Guaymas Basin ◽  
Oxidation Of Methane ◽  
Hydrothermal Sediments ◽  
Deep Sea Sediments ◽  
Effects Of Temperature ◽  
Temperature And Pressure

ABSTRACT Rates of sulfate reduction (SR) and anaerobic oxidation of methane (AOM) in hydrothermal deep-sea sediments from Guaymas Basin were measured at temperatures of 5 to 200°C and pressures of 1 × 105, 2.2 × 107, and 4.5 × 107 Pa. A maximum SR of several micromoles per cubic centimeter per day was found at between 60 and 95°C and 2.2 × 107 and 4.5 × 107 Pa. Maximal AOM was observed at 35 to 90°C but generally accounted for less than 5% of SR.

Cr(VI) reduction coupled with anaerobic oxidation of methane in a laboratory reactor

2016 ◽  
Vol 102 ◽  
pp. 445-452 ◽  
Author(s):  
Yong-Ze Lu ◽  
Liang Fu ◽  
Jing Ding ◽  
Zhao-Wei Ding ◽  
Na Li ◽  
...  
Keyword(s):  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane ◽  
Laboratory Reactor

Anaerobic oxidation of methane at 2.73Ga? The record of the Tumbiana pristine drill core

2006 ◽  
Vol 70 (18) ◽  
pp. A649
Author(s):  
C. Thomazo ◽  
M. Ader ◽  
J. Farquhar ◽  
P. Philippot
Keyword(s):  
Anaerobic Oxidation Of Methane ◽  
Drill Core ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

scholarly journals Anaerobic oxidation of methane associated with sulfate reduction in a natural freshwater gas source

2015 ◽  
Vol 10 (6) ◽  
pp. 1400-1412 ◽  
Author(s):  
Peer HA Timmers ◽  
Diego A Suarez-Zuluaga ◽  
Minke van Rossem ◽  
Martijn Diender ◽  
Alfons JM Stams ◽  
...  
Keyword(s):  
Sulfate Reduction ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane ◽  
Gas Source
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