Denitrification potential and its relation to organic carbon quality in three coastal wetland soils

Dodla, Syam K.; Wang, Jim J.; DeLaune, R. D.; Cook, Robert L.

doi:10.1016/j.scitotenv.2008.08.022

Cited by 174 publications

(78 citation statements)

References 40 publications

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“…More gene copies of narG and nirS were observed in the river sediment with higher NO − 3 concentrations (Chon et al, 2009). Availability of organic matter and carbon/nitrogen ratio determine bacterial biomass and NO − 3 reduction rates as well as pathways (Burgin and Hamilton, 2007;Dodla et al, 2008). Some dissimilatory NO − 3 reducing communities compete for NO − 2 with denitrifying bacteria.…”

Section: Introductionmentioning

confidence: 99%

Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments

et al. 2011

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Abstract. Denitrification in river sediments leads to nitrate removal from the aquatic system; therefore, it is necessary to understand functional diversity of denitrifier communities in the system. Sediment samples (0-25 cm depth) were collected from three typical locations along the Pearl River. The real-time PCR approach was used to measure the abundance of nitrate (narG), nitrite (nirS, nirK and nrfA), and nitrous oxide (nosZ) reductase genes from the sediment samples. Assemblages of nirS, nirK and nosZ indicated that complete denitrification occurred in sediment cores, with the greatest number of gene copies from 5-15 cm depth. Dissimilatory nitrate reduction appeared to be important below 15 cm depth, based on increasing gene copies of narG and nrfA with sediment depth. There was a close match (78-94 %) between the nirS sequences recovered from the Pearl River sediment and those detected in estuarine and marine sediments as well as active sludge, suggesting that the nitrogen source in the Pearl River sediment was affected by domestic sewage inputs and irregular tides. Canonical correspondence analysis indicated that the spatial distribution of denitrifying bacteria was highly correlated with dissolved inorganic nitrogen (including NH + 4 , NO − 2 and NO − 3 ) concentrations in sediment. It was concluded that the difference in dissolved inorganic nitrogen concentrations along the sediment profile influenced the distribution of denitrifying genes and the nirS-encoding denitrifier community in the river sediment. In addition, a variety of novel denitrifying bacteria were revealed in the river sediment.

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Section: Introductionmentioning

confidence: 99%

Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments

et al. 2011

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“…Field manipulations of mineral and organic inputs were also shown to impact on these denitrifiers community traits, as exemplified with sewage sludge (Enwall et al, 2005) and composted pig manure (Dambreville et al, 2006) on narG and nosZ genes diversity. In other ecosystem types or in soil microcosms, denitrifiers were also susceptible to the variation in organic substrates availability and diversity (Hallin et al, 2006;Dodla et al, 2008;Gibert et al, 2008;Henderson et al, 2010). Here, the compositional shifts that affected the nitrite and the nitrous oxide reductase communities in amended soils were community specific in so far as the different clusters and sub-clusters of both dendrograms (see Figs.…”

Section: Mulch Effects On the Denitrifiers Communitymentioning

confidence: 83%

Soil Organic Matter Quality, Structure and Activity of the Denitrifiers Community as Influenced by Decaying Mulched Crop Residues

Dieng¹,

Baudoin²,

Thioulouse³

et al. 2015

AEER

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Dieng et al.: Soil organic matter quality, structure and activity of the denitrifiers community as influenced by decaying mulched crop residues -655 - Abstract. Our experiment evaluated the effect of maize and peanut mulched residues upon soil organic matter and denitrifying community over a five-week incubation in soil microcosms. Soil organic matter under peanut and maize debris contrasted in biochemical quality throughout incubation, despite identical soil C contents that were significantly increased by both organic amendments. Moreover, only soluble extracts originating from the peanut treated soils could significantly fuel semi-potential denitrification. Accordingly, the composition of the nirK and nosZ communities was also specifically affected by mulch type, and the strongest impact was registered within the nosZ gene-bearing denitrifiers under peanut residues. Residue enriched soils displayed temporal patterns of potential denitrification activity that were also dependant on residue type. The highest overall emission rates were recorded with soils under maize mulch but they were not mirrored by direct N 2 O contents of the microcosm's headspace. Overall, both soil organic matter and denitrifiers community changes were conditioned throughout the decomposition kinetics by the original quality of mulched crop residues. However, the denitrification activity was decoupled both from the composition of the denitrifying community and from the soil organic matter quality.

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“…Previous studies have found that the SOC content would be significantly increased with improved soil quality (i.e., salinity reduction) and agricultural management (i.e., freshwater addition). Yu et al (2012) claimed that the Yellow River Delta will have great potential for SOC sequestration because of its low SOC content compared to other coastal regions in China (Dodla et al 2008;Wang et al 2007); moreover, anthropogenic activities have played a major role in the SOC dynamics in this area.…”

Section: Soc Evolutions During the Last 30 Yearsmentioning

confidence: 99%

Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period

Han¹,

Sun²,

Li³

et al. 2016

Plant Soil

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Aims Try to detect the spatiotemporal dynamics and the controlling factors of soil organic carbon (SOC) in the North China Plain (NCP) over the last 30 years: 1980s-2010s. Methods We investigated the SOC evolution by compiling data from 32 published papers during the last 30 years. Then we examined the spatial pattern and controlling factors by analysing a two-period sampling observations (1980s and 2010s) and multiple explanatory variables in four typical counties.

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Denitrification potential and its relation to organic carbon quality in three coastal wetland soils

Cited by 174 publications

References 40 publications

Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments

Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments

Soil Organic Matter Quality, Structure and Activity of the Denitrifiers Community as Influenced by Decaying Mulched Crop Residues

Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period

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Denitrification potential and its relation to organic carbon quality in three coastal wetland soils

Cited by 174 publications

References 40 publications

Distribution of typical denitrifying functional genes and diversity of the &lt;i&gt;nirS&lt;/i&gt;-encoding bacterial community related to environmental characteristics of river sediments

Distribution of typical denitrifying functional genes and diversity of the &lt;i&gt;nirS&lt;/i&gt;-encoding bacterial community related to environmental characteristics of river sediments

Soil Organic Matter Quality, Structure and Activity of the Denitrifiers Community as Influenced by Decaying Mulched Crop Residues

Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period

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Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments

Distribution of typical denitrifying functional genes and diversity of the <i>nirS</i>-encoding bacterial community related to environmental characteristics of river sediments