Anaerobic ammonium oxidation mediated by Mn-oxides: from sediment to strain level

Javanaud, Cedric; Michotey, Valérie; Guasco, Sophie; Garcia, Nicole; Anschutz, Pierre; Canton, Mathieu; Bonin, Patricia

doi:10.1016/j.resmic.2011.01.011

Cited by 54 publications

(26 citation statements)

References 39 publications

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“…This could be related to slow nitrification in relation to slow oxidation of ammonium at low pH (Mihelcic, 1999). Nitrite production is observed at depth in the three lakes and likely results from anaerobic ammonium oxidation mediated by Mn-and/or Fe-oxyhydroxides (Clément et al, 2005;Javanaud et al, 2011). Dissolved phosphate is produced at depth in the sediment of the three lakes (Fig.…”

Section: Early Diagenesis Processes and Organic Matter Mineralizationmentioning

confidence: 92%

Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

et al. 2011

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Abstract. This study reports the very first results on highresolution sampling of sediments and their porewaters from three thermokarst (thaw) lakes representing different stages of ecosystem development located within the Nadym-Pur interfluve of the Western Siberia plain. Up to present time, the lake sediments of this and other permafrost-affected regions remain unexplored regarding their biogeochemical behavior. The aim of this study was to (i) document the early diagenesic processes in order to assess their impact on the organic carbon stored in the underlying permafrost, and (ii) characterize the post-depositional redistribution of trace elements and their impact on the water column. The estimated organic carbon (OC) stock in thermokarst lake sediments of 14 ± 2 kg m −2 is low compared to that reported for peat soils from the same region and denotes intense organic matter (OM) mineralization. Mineralization of OM in the thermokarst lake sediments proceeds under anoxic conditions in all the three lakes. In the course of the lake development, a shift in mineralization pathways from nitrate and sulfate to Fe-and Mn-oxyhydroxides as the main terminal electron acceptors in the early diagenetic reactions was suggested. This shift was likely promoted by the diagenetic consumption of nitrate and sulfate and their gradual depletion in the water column due to progressively decreasing frozen peat lixiviation occurring at the lake's borders. Trace elements were mobilized from host phases (OM and Fe-and Mn-oxyhydroxides) and partly sequestered in the sediment in the form of authigenic Fe-sulfides. Arsenic and Sb cycling was also closely linked to that of OM and Fe-and Mnoxyhydroxides. Shallow diagenetic enrichment of particulate Sb was observed in the less mature stages. As a result of auCorrespondence to: S. Audry (stephane.audry@get.obs-mip.fr) thigenic sulfide precipitation, the sediments of the early stage of ecosystem development were a sink for water column Cu, Zn, Cd, Pb and Sb. In contrast, at all stages of ecosystem development, the sediments were a source of dissolved Co, Ni and As to the water column. However, the concentrations of these trace elements remained low in the bottom waters, indicating that sorption processes on Fe-bounding particles and/or large-size organo-mineral colloids could mitigate the impact of post-depositional redistribution of toxic elements on the water column.

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Section: Early Diagenesis Processes and Organic Matter Mineralizationmentioning

confidence: 92%

Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

et al. 2011

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“…For instance, ODP site 854B [Mayer et al, 1992] shows no detectable ammonium below 3 m sediment depth, while at integrated ODP site 1218A [Lyle et al, 2002] ammonium hovers around 11 μM within the uppermost 30 m of the sediment. These low ammonium concentrations may not be favorable to trigger the extended anammox reaction involving nitrate as an oxidizer as opposed to nitrite [Kartal et al, 2007]; however, they may be sufficient to trigger manganese oxide reduction in environments where the concentrations of manganese oxides greatly exceed those of nitrate [Javanaud et al, 2011].…”

Section: Quantifying Mn-n Couplingmentioning

confidence: 99%

“…R 7 was described through a first-order degradation with respect to the ammonium concentration with an inhibition term under high nitrate concentrations. This inhibition was implemented through a sigmoidal function ( , Table 1), which follows previous findings that high nitrate concentrations may impede Mn-anammox [Javanaud et al, 2011]. The oxidation of Mn 2+ in suboxic water columns [Trouwborst et al, 2006;Oldham et al, 2015] and a single electron reduction of manganese oxide at the interface of oxic-anoxic sediments [Madison et al, 2013] may lead to an intermediate Mn 3+ species.…”

Section: Model Setup and Reaction Networkmentioning

confidence: 99%

“…Nevertheless, in locations such as the Clarion-Clipperton fracture zone (CCFZ), where high manganese oxide contents (>0.05 wt %) have been measured [Mewes et al, 2014], the nitrogen and manganese cycles may be coupled. Javanaud et al [2011] demonstrated that isolated prokaryotes perform nitrification in anaerobic sediments containing high levels of manganese oxides. These authors theorized that the generated nitrate fueled additional denitrification and/or anaerobic ammonium oxidation with nitrite (anammox) [Kuypers et al, 2003].…”

Section: Introductionmentioning

confidence: 99%

“…This coupling involves both the oxidation of dissolved reduced manganese with nitrate [e.g., Javanaud et al, 2011;Lin and Taillefert, 2014] and anammox aided by the presence of manganese oxides (Mn-anammox).…”

Section: Introductionmentioning

confidence: 99%

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Extensive deep‐sea sedimentary areas are characterized by low organic carbon contents and thus harbor suboxic sedimentary environments where secondary (autotrophic) redox cycling becomes important for microbial metabolic processes. Simulation results for three stations in the Eastern Equatorial Pacific with low organic carbon content (<0.5 dry wt %) and low sedimentation rates (10−1–100 mm ky−1) show that ammonium generated during organic matter degradation may act as a reducing agent for manganese oxides below the oxic zone. Likewise, at these sedimentary depths, dissolved reduced manganese may act as a reducing agent for oxidized nitrogen species. These manganese‐coupled transformations provide a suboxic conversion pathway of ammonium and nitrate to dinitrogen. These manganese‐nitrogen interactions further explain the presence and production of dissolved reduced manganese (up to tens of μM concentration) in sediments with high nitrate (>20 μM) concentrations.

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Manganese Cycling in the Oceans

Tebo

Luther

2019

Encyclopedia of Water

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Manganese (Mn) is an essential element for life. Although its concentration is at (sub)nanomolar levels throughout the ocean, it affects the oxygen concentration of the ocean because it is central to the photosynthetic formation of dioxygen, O 2 , in photosystem center II. Mn inputs into the ocean are from atmospheric transport of particles and their dissolution to form dissolved Mn, and from the flux of dissolved Mn from rivers, sediments, and hydrothermal vents. The main removal mechanism is transport of particulate Mn from dust and organic matter to the sediments. The environmental chemistry of manganese centers on its +2, +3, and +4 oxidation states. Most recent data show that Mn(II) is dissolved, that Mn(IV) is particulate MnO 2 , and that Mn(III) can be particulate or dissolved when bound to organic complexes [denoted as Mn(III)‐L]. Mn(II) is oxidized primarily by microbial processes whereas MnO 2 is reduced by abiotic and biotic processes. Photochemical processing aids redox cycling in surface waters. In suboxic zones, which are defined as areas where both dissolved O 2 and H 2 S concentrations are below 3 μM, both oxidation and reduction processes can occur but usually at different depths. In suboxic zones, dissolved Mn is also released from organic matter during its decomposition and from MnO 2 reduction.

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Anaerobic ammonium oxidation mediated by Mn-oxides: from sediment to strain level

Cited by 54 publications

References 39 publications

Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

Quantifying manganese and nitrogen cycle coupling in manganese‐rich, organic carbon‐starved marine sediments: Examples from the Clarion‐Clipperton fracture zone

Manganese Cycling in the Oceans

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