Anaerobic nitrification–denitrification mediated by Mn-oxides in meso-tidal sediments: Implications for N2 and N2O production

Fernandes, Sheryl Oliveira; Javanaud, Cedric; Aigle, Axel; Michotey, Valérie; Guasco, Sophie; Deborde, Jonathan; Deflandre, Bruno; Anschutz, Pierre; Bonin, Patricia

doi:10.1016/j.jmarsys.2014.11.011

Cited by 45 publications

(12 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, nitrogen in different forms was higher in winter than in other seasons, except NO 2 − nitrogen. NO 2 − is the product of nitrate reductase action under anoxic conditions [39,40], which did not readily occur because the SPDO was 92.41% at the sediment-water interface in winter (Table 3). Thermal stratification has been found in eutrophic ponds; this causes DO stratification in the water column of a shallow water body [27,28,38].…”

Section: Effects Of Temperature and Do On Other Parametersmentioning

confidence: 99%

“…Anoxic conditions at the sediment-water interface favor the activity of methanogen to produce CH 4 . Further, the nitrogen removal pathways such as denitrification, simultaneous nitrification-denitrification and the anaerobic ammonium oxidation (ANAMMOX) process all require strict anaerobic conditions to consume NO 3 − /NO 2 − [36,40]. At the same time, degradation of organic matter is facilitated, but nitrification is inhibited under anoxic conditions [38].…”

Section: Effects Of Temperature and Do On Other Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Sediment-Water Methane Flux in a Eutrophic Pond and Primary Influential Factors at Different Time Scales

Liu

Gao

Zhang

et al. 2017

Water

View full text Add to dashboard Cite

Water bodies are major areas for methane release. Eutrophic water bodies may promote methane flux. The sediment-water interface is the major location for methane release, and studies on sediment-water interactions are necessary to regulate methane release in water. However, relevant studies on methane flux at the sediment-water interface are limited due to methodological difficulties. Using an innovative gas trapping device, this study investigated the seasonal characteristics and diel variation in summer methane flux from eutrophic water bodies and analyzed the correlations between temperature, dissolved oxygen (DO), different forms of nitrogen and the methane flux at different time scales. The results showed that methane flux in the eutrophic pond was high and had distinct seasonal variations and diel variations: the average value was 2.81 ± 0.19 mmol m −2 h −1 in summer, which was significantly greater than that in spring (0.62 ± 0.14 mmol m −2 h −1 ), autumn (0.63 ± 0.10 mmol m −2 h −1 ) (p < 0.01) and winter (approached zero). The diel characteristics of methane flux in summer exhibited a unimodal pattern of increase at night and decrease during the day. The correlation analysis showed that the sediment-water methane flux rate of the water body was significantly positively correlated with the temperature and NH 4 + concentration and significantly negatively correlated with DO, NO 3 − and NO 2 − concentration. Meanwhile, among different time scales, the correlations between NO 3 − /NH 4 + concentration and methane flux were the highest at the diel scale in summer (R 2 = 0.68, 0.87 respectively) when the temperature and DO vibration was low and the relationship between temperature/DO and methane flux was poor (R 2 = 0.45, 0.87 respectively). This study considered that higher NH 4 + -N and lower NO 3 − -N/NO 2 − -N content in eutrophic water could have an effect on the high methane flux in summer as well as the low dissolved oxygen content.

show abstract

Section: Effects Of Temperature and Do On Other Parametersmentioning

confidence: 99%

Section: Effects Of Temperature and Do On Other Parametersmentioning

confidence: 99%

Sediment-Water Methane Flux in a Eutrophic Pond and Primary Influential Factors at Different Time Scales

Liu

Gao

Zhang

et al. 2017

Water

View full text Add to dashboard Cite

show abstract

“…34 Important nitrate production would also imply reduction of oxidizers such as manganese and iron oxy(hydroxi)des and therefore enhancement of metal remobilization and recycling. 33,35,36 Therefore, we offer here the possibility to examine in two dimensions, the spatial nitrite and nitrate variability at a sufficient resolution that allows to describe chemical gradients generated by a mm-sized dead organism, a root apex, along a burrow wall. Further, these processes could be quantified with appropriate modeling.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Simultaneous Nitrite/Nitrate Imagery at Millimeter Scale through the Water–Sediment Interface

Metzger

Chanvalon

Cesbron

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

The present study describes new procedures to obtain at millimeter resolution the spatial distribution of nitrite and nitrate in porewaters, combining diffusive equilibrium in thin films (DET), colorimetry and hyperspectral imagery. Nitrite distribution can be easily achieved by adapting the well-known colorimetric method from Griess (1879) and using a common flatbed scanner with a limit of detection about 1.7 μmol L(-1). Nitrate distribution can be obtained after reduction into nitrite by a vanadium chloride reagent. However, the concentration of vanadium chloride used in this protocol brings coloration with a wide spectral signature that creates interference only deconvolvable by imaging treatment from an entire visible spectrum for each pixel (spectral analysis). This can be achieved by hyperspectral imaging. The protocol retained in the present study allows obtaining a nitrite/nitrate image with micromolar limit of detection. The methods were applied in sediments from the Loire Estuary after different treatments and allowed to precisely describe two-dimensional millimeter features. The present technique adds to the combination of gel-colorimetry and hyperspectral imagery a very promising new application of wide interest for environmental issues in the context of early diagenesis and benthic fluxes.

show abstract

“…The transformation of N (Supporting Information (SI) Figure S1) in aquatic environments has been extensively studied with emphasis on denitrification (sequential reduction of NO 3 – to NO 2 – , NO, N 2 O, and N 2 ), dissimilatory nitrate reduction to ammonium (DNRA, NO 3 – reduction to NO 2 – , and then to NH 4 + ), nitrification (NH 4 + oxidation to NO 2 – , and then to NO 3 – ), and anammox (anaerobic NH 4 + oxidation to N 2 in the presence of NO 2 – ). ,− Other processes that can affect N transformation, such as anaerobic nitrification, may also be important in some environments. − ,− The transformation of N is affected by water chemistry, the nature of the microbial community, the identity of the N species and their concentrations, dissolved O 2 (DO), dissolved and particulate organic carbon (OC), and exchangeable cations and capacity. ,− The transformation of N is also affected indirectly by sediment physical factors such as flow velocity and fluid residence time that affect N, DO, and OC supplies. ,,,, …”

Section: Introductionmentioning

confidence: 99%

Effect of Water Chemistry and Hydrodynamics on Nitrogen Transformation Activity and Microbial Community Functional Potential in Hyporheic Zone Sediment Columns

Liu

Nelson

et al. 2017

Environ. Sci. Technol.

View full text Add to dashboard Cite

Hyporheic zones (HZ) are active biogeochemical regions where groundwater and surface water mix. N transformations in HZ sediments were investigated in columns with a focus on understanding how the dynamic changes in groundwater and surface water mixing affect microbial community and its biogeochemical function with respect to N transformations. The results indicated that denitrification, DNRA, and nitrification rates and products changed quickly in response to changes in water and sediment chemistry, fluid residence time, and groundwater-surface water exchange. These changes were accompanied by the zonation of denitrification functional genes along a 30 cm advective flow path after a total of 6 days' elution of synthetic groundwater with fluid residence time >9.8 h. The shift of microbial functional potential toward denitrification was correlated with rapid NO reduction collectively affected by NO concentration and fluid residence time, and was resistant to short-term groundwater-surface water exchange on a daily basis. The results implied that variations in microbial functional potential and associated biogeochemical reactions in the HZ may occur at space scales where steep concentration gradients present along the flow path and the variations would respond to dynamic HZ water exchange over different time periods common to natural and managed riverine systems.

show abstract

Anaerobic nitrification–denitrification mediated by Mn-oxides in meso-tidal sediments: Implications for N2 and N2O production

Cited by 45 publications

References 55 publications

Sediment-Water Methane Flux in a Eutrophic Pond and Primary Influential Factors at Different Time Scales

Sediment-Water Methane Flux in a Eutrophic Pond and Primary Influential Factors at Different Time Scales

Simultaneous Nitrite/Nitrate Imagery at Millimeter Scale through the Water–Sediment Interface

Effect of Water Chemistry and Hydrodynamics on Nitrogen Transformation Activity and Microbial Community Functional Potential in Hyporheic Zone Sediment Columns

Contact Info

Product

Resources

About