15N/14N and 18O/16O stable isotope ratios of nitrous oxide produced during denitrification in temperate forest soils

Snider, David; Schiff, Sherry L.; Spoelstra, John

doi:10.1016/j.gca.2008.11.004

Cited by 60 publications

(91 citation statements)

References 36 publications

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“…7). Very large amounts of O-exchange have been measured before in lab studies (Kool et al, 2009;Snider et al, 2009;Rohe et al, 2014), including one study with agricultural soils collected 11 km from our research site (Snider et al, 2013, 94% Oexchange). Here, we provide strong evidence that O-exchange also occurs in situ.…”

Section: Isotopic and Molecular Evidence Of N 2 O Production Over A Rmentioning

confidence: 91%

“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 Chamber headspace samples (20 mL) were taken 0, 15, 30, and 60 min after deployment and injected into evacuated (<10 À1 torr) 12-mL Exetainer ® vials (Labco Limited). Concentration analysis of N 2 O was done on a Varian CP 3800 greenhouse gas analyzer (Varian Canada, Inc.) previously described by Snider et al (2009). Fluxes were calculated in the R Statistical Environment using the HMR package (Asger R. Pedersen, Aarhus University, Denmark).…”

Section: Micrometeorological N 2 O Flux Measurementsmentioning

confidence: 99%

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Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Snider

Thompson

Wagner-Riddle

et al. 2015

Soil Biology and Biochemistry

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Section: Isotopic and Molecular Evidence Of N 2 O Production Over A Rmentioning

confidence: 91%

Section: Micrometeorological N 2 O Flux Measurementsmentioning

confidence: 99%

Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Snider

Thompson

Wagner-Riddle

et al. 2015

Soil Biology and Biochemistry

Self Cite

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“…The main problem in this case is that measurements of 18 O enrichment factors are scarce and highly variable. For denitrification (NO 3 − to N 2 O), for example, the values range from −1‰ to 43‰ [Casciotti et al, 2002;Snider et al, 2008;Toyoda et al, 2005] (using Toyoda and Yoshida [1999] scale (see section 2), respectively. This difference suggests that reactions involved in denitrification result in 15 N enrichment at the central N relative to the terminal N, while reactions during nitrification result in smaller 15 N discrimination between the central N and the terminal N under our experimental conditions.…”

mentioning

confidence: 99%

Can N₂O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N₂O production and consumption in tropical soils?

Park

Pérez

Boering

et al. 2011

Global Biogeochem. Cycles

103

133

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Nitrous oxide (N2O) is an important greenhouse gas in which the main sources are tropical rainforest and agricultural soils. N2O is produced in soils by microbial processes, which are enhanced by the application of nitrogenous fertilizers. The soil N2O bulk isotopic composition (δ15Nbulk and δ18O) and the “site‐specific,” or intramolecular, 15N isotopic composition, i.e., the 15N/14N ratio at the cenral (α) or terminal (β) nitrogen position, expressed in this study as δ15Nα and δ15Nβ could help identify both the sources (natural and anthropogenic) and microbial pathways of N2O production and consumption prior to emission.We report new isotope measurements of soil N2O emissions and from soil air collected during the rainy season in a mature tropical forest (Tapajos National Forest, Para, Brazil) and in a tropical agricultural corn field (“Fundo Tierra Nueva,” Guárico State, Venezuela). The statistically different δ15Nbulk emission weighted average between the mature forest (−18.0‰ ± 4.0‰, n = 6) and agricultural corn field (−34.3‰ ± 12.4‰, n = 17) suggest that the δ15Nbulk data are useful for distinguishing N2O fluxes from fertilized agricultural and natural “background” soils. They also demonstrate that the site‐specific δ15N measurements have the potential to provide a new tool to differentiate between the production and consumption N2O microbiological processes in soils. This study further demonstrates that the observed correlations (or lack thereof) between δ15Nα, δ15Nβ, and δ18O can be used to estimate the relative proportion of N2O that would have been emitted to the air but was consumed via reduction of N2O to N2 within the soil.

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“…Microbial denitrification involves a significant fractionation of oxygen and nitrogen isotopes, and the residual nitrate is relatively enriched in 18 O and 15 N [15, 23]. Experimental studies of the biological denitrification process [34] …”

Section: Discussion For Originmentioning

confidence: 99%

N and O isotopes and the ore-forming mechanism of nitrate deposits in the Turpan-Hami Basin, Xinjiang, China

Yan

Liu

et al. 2012

Sci. China Earth Sci.

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The recently discovered nitrate ore field in the Turpan-Hami Basin of western China represents an estimated resource of 2.5 billion tons, and is comparable in scale to the Atacama Desert super-scale nitrate deposit in Chile. The research on this area is rarely carried out, and the origin of the deposits remains uncertain. In this study, new methods were used to systematically analyze N and O isotopes in nitrate minerals collected from the Kumutage, Xiaocaohu, Wuzongbulak, Dawadi, Tuyugou, and Shaer ore deposits in the Turpan-Hami Basin. The data showed that the  15 N Air value ranges from 0.7‰ to 27.6‰, but mostly between 2‰ and 6‰, which was similar to atmospheric NO 3  . The 18 O was highly enriched with  18 O V-SMOW varying from 30.2‰ to 46.7‰. This differs from levels in deposits derived from microbial nitrogen fixation, but is similar to those in atmospheric nitrates. N and O isotopes data indicated that nitrate deposits in Turpan-Hami Basin must be the result of deposition of atmospheric nitrate particles. Although atmospheric nitrate particles are common, the nitrate deposits could form only under the condition of long-term extreme drought climate and very limited biological activity. This paper summarized the ore-forming mechanism of different types nitrate deposits based on their geological setting. N and O isotopes, nitrate deposits, deposition of atmospheric nitrate particles, Turpan-Haimi Basin Citation:Qin Y, Li Y H, Liu F, et al. N and O isotopes and the ore-forming mechanism of nitrate deposits in the Turpan-Hami Basin,

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15N/14N and 18O/16O stable isotope ratios of nitrous oxide produced during denitrification in temperate forest soils

Cited by 60 publications

References 36 publications

Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Can N₂O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N₂O production and consumption in tropical soils?

N and O isotopes and the ore-forming mechanism of nitrate deposits in the Turpan-Hami Basin, Xinjiang, China

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15N/14N and 18O/16O stable isotope ratios of nitrous oxide produced during denitrification in temperate forest soils

Cited by 60 publications

References 36 publications

Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Molecular techniques and stable isotope ratios at natural abundance give complementary inferences about N2O production pathways in an agricultural soil following a rainfall event

Can N2O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N2O production and consumption in tropical soils?

N and O isotopes and the ore-forming mechanism of nitrate deposits in the Turpan-Hami Basin, Xinjiang, China

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Can N₂O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N₂O production and consumption in tropical soils?