Nitric oxide turnover in permeable river sediment

Schreiber, Frank; Stief, Peter; Kuypers, Marcel M. M.; Beer, Dirk de

doi:10.4319/lo.2014.59.4.1310

Cited by 21 publications

(9 citation statements)

References 36 publications

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“…To determine the effect of higher Fe 2+ on chemodenitrification in Mesoproterozoic oxyclines, we modeled N 2 O production rates at Fe 2+ concentrations of up to 10 mM—near the predicted upper limit for Proterozoic oceans (Derry, ). We varied NO concentrations from 10 pM, the lower range in modern OMZ oxyclines (Ward & Zafiriou, ), to 500 nM, the maximum concentration measured in modern sediments (Schreiber, Polerecky, & De Beer, ; Schreiber, Stief, Kuypers, & De Beer, ). Our rate law suggests that 1–5 nM N 2 O day −1 production rates would be possible in modern oxyclines with >1 nM NO and >10 μM Fe 2+ (Babbin et al., ) via solely abiotic reactions (Figure ).…”

Section: Resultsmentioning

confidence: 99%

Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration

et al. 2018

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The potent greenhouse gas nitrous oxide (N O) may have been an important constituent of Earth's atmosphere during Proterozoic (~2.5-0.5 Ga). Here, we tested the hypothesis that chemodenitrification, the rapid reduction of nitric oxide by ferrous iron, would have enhanced the flux of N O from ferruginous Proterozoic seas. We empirically derived a rate law, d N 2 O d t = 7.2 × 10 - 5 [ Fe 2 + ] 0.3 [ NO ] 1 , and measured an isotopic site preference of +16‰ for the reaction. Using this empirical rate law, and integrating across an oceanwide oxycline, we found that low nM NO and μM-low mM Fe concentrations could have sustained a sea-air flux of 100-200 Tg N O-N year , if N fixation rates were near-modern and all fixed N was emitted as N O. A 1D photochemical model was used to obtain steady-state atmospheric N O concentrations as a function of sea-air N O flux across the wide range of possible pO values (0.001-1 PAL). At 100-200 Tg N O-N year and >0.1 PAL O , this model yielded low-ppmv N O, which would produce several degrees of greenhouse warming at 1.6 ppmv CH and 320 ppmv CO . These results suggest that enhanced N O production in ferruginous seawater via a previously unconsidered chemodenitrification pathway may have helped to fill a Proterozoic "greenhouse gap," reconciling an ice-free Mesoproterozoic Earth with a less luminous early Sun. A particularly notable result was that high N O fluxes at intermediate O concentrations (0.01-0.1 PAL) would have enhanced ozone screening of solar UV radiation. Due to rapid photolysis in the absence of an ozone shield, N O is unlikely to have been an important greenhouse gas if Mesoproterozoic O was 0.001 PAL. At low O , N O might have played a more important role as life's primary terminal electron acceptor during the transition from an anoxic to oxic surface Earth, and correspondingly, from anaerobic to aerobic metabolisms.

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Section: Resultsmentioning

confidence: 99%

Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration

et al. 2018

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“…Measured NO concentrations in modern ferruginous systems are highly variable but can reach up to 500 nM e.g. in anoxic sediments (Schreiber et al, 2008(Schreiber et al, , 2014. In these settings NO may be produced as a by-product of microbial denitrification or chemodenitrification, but is also an intermediate of nitrification and ammonium oxidation (Kuypers et al, 2018).…”

Section: Would Inhibition By No Be Expected In Modern and Ancient Environments?mentioning

confidence: 99%

Inhibition of photoferrotrophy by nitric oxide in ferruginous environments

Nikeleit¹,

Mellage²,

Bianchini³

et al. 2021

Preprint

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Anoxygenic phototrophic Fe(II)-oxidizers (photoferrotrophs) are thought to have thrived in Earth’s ancient ferruginous oceans and played a primary role in the precipitation of Archean and Paleoproterozoic (3.8-1.85 Ga) banded iron formations (BIF). The end of BIF deposition by photoferrotrophs has often been interpreted as being the result a deepening of water column oxygenation below the photic zone concomitant with the proliferation of cyanobacteria. We suggest here that a potentially overlooked aspect influencing BIF precipitation by photoferrotrophs is competition with another anaerobic Fe(II)-oxidizing metabolism. It is speculated that microorganisms capable of coupling Fe(II) oxidation to the reduction of nitrate were also present early in Earth history when BIF were being deposited, but the extent to which they could compete with photoferrotrophs when favourable geochemical conditions overlapped is unknown. Utilizing microbial incubations and numerical modelling, we show that nitrate-reducing Fe(II)-oxidizers metabolically outcompete photoferrotrophs for dissolved Fe(II). Moreover, the nitrate-reducing Fe(II)-oxidizers inhibit photoferrotrophy via the production of toxic nitric oxide (NO). Four different photoferrotrophs, representing both green sulfur and purple non-sulfur bacteria, are susceptible to this toxic effect despite having genomic capabilities for NO detoxification. Indeed, despite NO detoxification mechanisms being ubiquitous in some groups of phototrophs at the genomic level (e.g. Chlorobi and Cyanobacteria) it is likely they would still be influenced by NO stress. We suggest that the production of NO during nitrate-reducing Fe(II) oxidation in ferruginous environments represents an as yet unreported control on the activity of photoferrotrophs in the ancient oceans and thus the mechanisms driving precipitation of BIF.

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“…Zafiriou and McFarland (1981) suggested that photochemically produced NO is a potential source of atmospheric NO during daylight. Apart from the photochemical production, various microbial pathways of NO have been identified including denitrification, nitrification and anammox (Schreiber et al, 2014;Martens-Habbena et al, 2015;Caranto and Lancaster, 2017;Kuypers et al, 2018). Additionally, NO is a messenger molecule in marine organisms: phytoplankton does not only response to exogenous NO (Zhang et al, 2005), but also produce NO during their growth (Zhang et al, 2006a, b;Kim et al, 2006Kim et al, , 2008.…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide (NO) in the Bohai and Yellow Seas

Tian

Xue

Liu

et al. 2018

Preprint

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Abstract. Nitric oxide (NO) is a short-lived compound of the marine nitrogen cycle; however, our knowledge about its oceanic distribution and pathways is rudimentary. Here we present the measurements of dissolved NO in the surface and bottom layers at 75 stations in the Bohai Sea (BS) and Yellow Sea (YS) in June 2011. Moreover, NO photoproduction rates were determined at 27 stations in both seas. The NO concentrations in the surface and bottom layers were highly variable and ranged from below the detection limit (i.e. 32&#8201;pmol&#8201;L&#8722;1) to 616&#8201;pmol&#8201;L&#8722;1 in the surface layer and to 482&#8201;pmol&#8201;L&#8722;1 in the bottom layer. There was no significant difference between the mean NO concentrations in the surface (186&#8201;&#177;&#8201;108&#8201;pmol&#8201;L&#8722;1) and bottom (174&#8201;&#177;&#8201;123&#8201;pmol&#8201;L&#8722;1) layers. A decreasing trend of NO bottom layer concentrations salinity indicates a NO input by submarine groundwater discharge. NO in the surface layer was supersaturated at all stations during both day and night and therefore the BS and YS were a persistent source of NO to the atmosphere at the time of our measurements. The accumulation of NO during daytime was resulting from photochemical production and photoprodcution rates were correlated to illuminance. The persistent nighttime NO supersaturation pointed to a, so far unknown, NO dark production. NO sea-to-air flux densities were much lower than the NO photoproduction rates. Therefore, we conclude that the bulk of the NO produced in the mixed layer was rapidly consumed before its release to the atmosphere. Overall, the oceanic NO emissions to the atmosphere were negligible compared to anthropogenic NOx sources such as emissions from ships.

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Nitric oxide turnover in permeable river sediment

Cited by 21 publications

References 36 publications

Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration

Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration

Inhibition of photoferrotrophy by nitric oxide in ferruginous environments

Nitric oxide (NO) in the Bohai and Yellow Seas

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