Impact of suburbanization on ground water quality and denitrification in coastal aquifer sediments

Aelion, C. Marjorie; Shaw, J. Nikki; Wahl, Matthew

doi:10.1016/s0022-0981(97)00008-7

Cited by 26 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most C:N ratio values in the present study were higher than 25, which likely lead to no significant correlation between N 2 O emissions and C:N ratio in most soil profile. NH 4 + -N and NO 3 − -N content mostly had negative correlations with N 2 O emission in the four positions, which was similar with the conclusions drawn by Huang et al (2002) and Tauchnitz et al (2008), but was contrary to mostly previous studies (Aelion et al, 1997;Muñoz-Hincapié et al, 2002). In vegetation communities, one possible reason was related to the interactions of vegetation and microorganism (nitrifiers and denitrifiers) that produced negative influences on the transformation of NH 4 + -N or NO 3 − -N during N 2 O production.…”

Section: Discussionsupporting

confidence: 84%

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Zhang

Song

Zhang

et al. 2013

Ecological Engineering

View full text Add to dashboard Cite

a b s t r a c tSalt-affected soils are extensively present and constitute about 7% of total land surface. However, our knowledge about nitrous oxide (N 2 O) production through rapid nitrification and denitrification processes between the atmosphere and the saline soil is very limited. In order to evaluate the potential of N 2 O consumption in saline soils, this study was therefore designed to quantify the variability in N 2 O emissions monthly in the Yellow River Delta in China. Main issues include: different saline-alkaline soils and temporal aspects. Our aim was to quantify N 2 O emissions and identify the major drivers controlling its emissions for providing guidance in eco-restoring coastal wetland on large scale. By using in situ closed chambers the annual average emissions of N 2 O from the mudflat was determined and it was significantly higher than plant communities, especially herbage communities. In general, the emissions of N 2 O of different ecosystems showed a unique-peak annual pattern, with the peak in September. Saline-alkaline mudflat and different vegetations acted as N 2 O source in the Yellow River Delta and the N 2 O emission of different ecosystems followed the order: Saline-alkaline mudflat > T. chinensis >S. salsa > P. australis. Therefore restoration of saline land through revegetation was necessary to reduce the N 2 O emission of saline soils. The effects of air and soil temperature on N 2 O fluxes were significant in salt-affected soils except P. australis. Soil water content and electrical conductivity correlated positively or negatively with N 2 O emissions in mudflat and P. australis community. While relationships between N 2 O production and other soil properties (TC, TN, C:N ratio, NH 4 + -N and NO 3 − -N) were only significant in mudflat and T. chinensis community. Temporal variations of N 2 O emission were related to the interactions of abiotic factors (air and soil temperature, soil water content and electrical conductivity) and the variations of other soil properties, while spatial variations were mainly affected by the vegetation composition at spatial scale.

show abstract

Section: Discussionsupporting

confidence: 84%

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Zhang

Song

Zhang

et al. 2013

Ecological Engineering

View full text Add to dashboard Cite

show abstract

“…Positive/negative relationships between N 2 O emissions and total C or total N have been reported in various studies (Allen et al, 2007;Søvik and Kløve, 2007) due to C/N regulations and interactions of other abiotic variables at spatial scale (Huang et al, 2002). NH 4 -N and NO 3 -N content mostly had negative correlations with N 2 O emission in the four positions (Table 4), which was similar with the conclusions drawn by Huang et al (2002) and Tauchnitz et al (2008), but was contrary to mostly previous studies (Aelion et al, 1997;Muñoz-Hincapié et al, 2002). In HSM, MSM and LSM, one possible reason was related to the interactions of vegetation (S. salsa) and microorganism (nitrifiers and denitrifiers) that produced negative influences on the transformation of NH 4 -N or NO 3 -N during N 2 O production.…”

Section: Spatial Variations Of N 2 O and Ch 4 Fluxessupporting

confidence: 87%

Fluxes of nitrous oxide and methane in different coastal Suaeda salsa marshes of the Yellow River estuary, China

et al. 2013

View full text Add to dashboard Cite

“…Dog Creek contained water all year-round because it was excavated across the natural groundwater divide to provide drainage for the adjacent residential development. Located 30 km north of North Inlet estuary in a suburban watershed with a 95-acre drainage area [20], this area has extensive impervious surfaces (roads), limited agricultural and industrial development [21], and increasing tourism. Residential development in this area has increased 330% in the last decade [19] as have concentrations of polynuclear aromatic hydrocarbons, heavy metals, nitrate, and phosphate [22].…”

Section: Site Descriptionmentioning

confidence: 99%

Atrazine biodegradation to deisopropylatrazine and deethylatrazine in coastal sediments of different land uses

Aelion

Mathur

2001

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Atrazine, a triazine herbicide widely used in the United States, contributes to surface-water and groundwater contamination, as can deisopropylatrazine (DIA) and deethylatrazine (DEA), two of its microbial degradation products. Production of DIA and DEA by native bacteria in aquatic sediments has not been investigated thoroughly. We assessed atrazine and production of DIA and DEA over time in coastal aquatic sediments associated with different land uses including creeks from an undeveloped preserve and a suburban development, a golf course drainage ditch, and a contaminated commercial harbor. Sediments were incubated in microcosms, spiked with U-14C-atrazine, extracted, and analyzed for 14C in a liquid scintillation counter. Atrazine, DIA, and DEA also were quantified by gas chromatography-mass spectrometry. The amount of 14C recovered varied at each site as a function of the sediment organic carbon content and decreased significantly over time. Both DEA and DIA were measured primarily in the aqueous phase. Transformation was more extensive to DIA than to DEA. The ratio of DIA to atrazine recovered from the undeveloped preserve was as high as 0.13. In contrast, the golf course had limited biotransformation, and had the greatest atrazine recoveries so atrazine, not DEA and DIA, may have a greater impact at this site.

show abstract

Impact of suburbanization on ground water quality and denitrification in coastal aquifer sediments

Cited by 26 publications

References 31 publications

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Fluxes of nitrous oxide and methane in different coastal Suaeda salsa marshes of the Yellow River estuary, China

Atrazine biodegradation to deisopropylatrazine and deethylatrazine in coastal sediments of different land uses

Contact Info

Product

Resources

About