Denitrification and nitrous oxide effluxes in boreal, eutrophic river sediments under increasing nitrate load: a laboratory microcosm study

Silvennoinen, Hanna; Liikanen, Anu; Torssonen, Jouni; Stange, Claus Florian; Martikainen, Pertti J.

doi:10.1007/s10533-008-9262-z

Cited by 50 publications

(41 citation statements)

References 59 publications

(54 reference statements)

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“…3a and 4). An increase in N 2 O saturation with a decrease in salinity was reported in several estuaries (Berounsky and Nixson, 1993;Bange, 2006;Silvennoinen et al, 2008;Zhang et al, 2010). Similarly, N 2 O saturation showed an inverse relation with dissolved oxygen saturation (r 2 00.30; p B0.05; Fig.…”

Section: Spatial and Temporal Variations In N 2 O Concentrations In Tsupporting

confidence: 55%

Contribution of N<sub>2</sub>O emissions to the atmosphere from Indian monsoonal estuaries

Gijjapu

Sarma

2013

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T Estuaries are known to contribute a significant amount of nitrous oxide (N 2 O) to the atmosphere; however, the contribution from the Indian estuaries is unknown. We made an attempt to estimate emissions of N 2 O from the Indian estuaries by collecting samples from 28 major and minor estuaries along the Indian coast during the wet and dry periods. The N 2 O was mostly saturated in all measured Indian estuaries during the study period (72Á631%), with exceptionally high saturation in the Ponniyaar estuary (5902%) during the wet period. The N 2 O saturation displayed a strong relation with dissolved inorganic nitrogen (DIN; nitrate ' nitrite and ammonium), ammonium and dissolved oxygen saturation, suggesting that nitrification is the major source of N 2 O in the Indian estuaries. The negative relation between salinity and N 2 O saturation suggests inner estuaries are a strong source compared to outer estuaries. The annual mean N 2 O saturation (2049137%) and fluxes (1.3 mmol N 2 O m (2 d (1 ) in the Indian estuaries were significantly less than European estuaries (271% andThe estimation of flux of N 2 O from the European estuaries was also biased due to the inclusion of an exceptionally high supersaturation value from a small UK estuary, Colne (2645%). However, low N 2 O saturation and fluxes in the Indian estuaries were related to mean low concentration of DIN that led to low nitrification rates compared to world estuaries. Despite India ranking second in artificial fertilizers use, high flushing rates during the wet period reduce residence time leading to less modification within the estuary.

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Section: Spatial and Temporal Variations In N 2 O Concentrations In Tsupporting

confidence: 55%

Contribution of N<sub>2</sub>O emissions to the atmosphere from Indian monsoonal estuaries

Gijjapu

Sarma

2013

Tellus B: Chemical and Physical Meteorology

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“…The model was re-run 15 times with different randomly selected starting points for each diel time series. Model results where r 2 between modeled and observed data was >0.80 were averaged to obtain [Beaulieu et al, 2010a;Garcia-Ruiz et al, 1998b;Inwood et al, 2005;Kemp and Dodds, 2002;Martin et al, 2001;Richardson et al, 2004;Silvennoinen et al, 2008b] Increase [Silvennoinen et al, 2008b] Increase No effect [Beaulieu et al, 2010a] Increased ammonium Nitrification Increase [Kemp and Dodds, 2002;Strauss and Lamberti, 2000;Strauss et al, 2002] Decrease, or no effect [Jiang and Bakken, 1999] c Possible increase…”

Section: Dissolved Gas Fluxesmentioning

confidence: 99%

Nitrogen enrichment and the emission of nitrous oxide from streams

Baulch¹,

Schiff²,

Maranger³

et al. 2011

Global Biogeochem. Cycles

125

101

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[1] Nitrous oxide (N 2 O) is a potent greenhouse gas produced during nitrogen cycling. Global nitrogen enrichment has resulted in increased atmospheric N 2 O concentrations due in large part to increased soil emissions. There is also a potentially important flux from streams, rivers and estuaries; although measurements of these emissions are sparse, and role of aquatic ecosystems in global N 2 O budgets remains highly uncertain. Using the longest-term measurements of N 2 O fluxes from streams to date, we found annual fluxes from 14 sites in five streams of south-central Ontario, Canada varied widely-from net uptake of 3.2 ± 0.2 (standard deviation) mmol N 2 O m −2 d −1 to net release of 776 ± 61 mmol N 2 O m −2 d −1 . N 2 O consumption was associated with very low nitrate concentrations (<2.7 mM). Mean annual (log-transformed) N 2 O emissions from our study streams (across sites and years) were positively related to nitrate concentrations (r 2 = 0.59).This nitrate-N 2 O relationship can be generalized across all 20 streams (in Canada, Japan, Mexico, and the midwestern United States) for which published data now exist and could provide a new basis for the IPCC to calculate agricultural emissions from streams. In addition to predicting annual emissions, we present the first measurements of N 2 O concentrations under ice in streams. Nitrate was a strong predictor of N 2 O % saturation during periods of ice cover (r 2 = 0.89), when gas exchange is negligible. Given the small surface area of streams within a catchment and the fact our measured areal fluxes are comparable to reported fluxes from agricultural soils, this suggests streams are a small regional N 2 O source.Citation: Baulch, H. M., S. L. Schiff, R. Maranger, and P. J. Dillon (2011), Nitrogen enrichment and the emission of nitrous oxide from streams, Global Biogeochem. Cycles, 25, GB4013,

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“…Previous studies have demonstrated that N 2 O production and emission from diverse rivers respond significantly to increasing anthropogenic N loading (Cole and Caraco, 2001;Garnier et al, 2006). Numerous investigations have reported strong correlations between dissolved N 2 O and NO 3 -concentration in river waters (Herrman et al, 2008;Silvennoinen et al, 2008). Yan et al (2012) concluded that NO 3 -is a valid predictor of river N 2 O production in a large-deep river.…”

Section: Introductionmentioning

confidence: 99%

Effect of dissolved oxygen and nitrogen on emission of N 2 O from rivers in China

Wang

Chen

Yan

et al. 2015

Atmospheric Environment

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h i g h l i g h t sDemonstrate heterogeneous pattern of N 2 O concentration and emission in various rivers. N 2 O in urban river were significantly higher than those in agricultural runoff rivers. NO 3 -and DO explaining 47% variability in N 2 O production in runoff rivers.NH 4 þ and DO explaining 64% variability in N 2 O production in urban rivers. a r t i c l e i n f o b s t r a c tSix rivers from three watersheds in China were chosen to study the temporal and spatial variations in nitrous oxide (N 2 O) concentrations and emissions in order to examine the link between N 2 O production and dissolved oxygen (DO) and nitrogen levels. These rivers can generally be divided into two types: runoff rivers with significant natural and agricultural runoff, and urban rivers with significant urban effluents. The results showed that N 2 O concentrations were 0.15e1.07 (mean 0.51) and 0.22e22.7 (mean 4.10) ug N L À1 in runoff rivers and an urban river, respectively. and DO explained 64% variability in N 2 O production. We suggest that the IPCC method to calculate N 2 O emission factors should be revised in view of the importance of these multiple factors.

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Denitrification and nitrous oxide effluxes in boreal, eutrophic river sediments under increasing nitrate load: a laboratory microcosm study

Cited by 50 publications

References 59 publications

Contribution of N<sub>2</sub>O emissions to the atmosphere from Indian monsoonal estuaries

Contribution of N<sub>2</sub>O emissions to the atmosphere from Indian monsoonal estuaries

Nitrogen enrichment and the emission of nitrous oxide from streams

Effect of dissolved oxygen and nitrogen on emission of N 2 O from rivers in China

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