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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/30/5/1732
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https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1732
Last checked: 12/14/2016
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Casey, Ryan E.;
Taylor, M. D.;
Klaine, Stephen J. |
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| Author Affiliation: | Casey: Department of Chemistry, Environmental Science and Studies Program, Towson University, MD; Taylor and Klaine: Department of Environmental Toxicology, Clemson University, SC |
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| Title: | Mechanisms of nutrient attenuation in a subsurface flow riparian wetland |
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| Section: | Wetlands and aquatic processes
Other records with the "Wetlands and aquatic processes" Section
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| Source: | Journal of Environmental Quality. Vol. 30, No. 5, September/October 2001, p. 1732-1737. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Subsurface hydrology; Riparian zones; Wetlands; Buffer zones; Nutrient transport; Denitrification; Phosphates
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| Abstract/Contents: | "Riparian wetlands are transition zones between terrestrial and aquatic environments that have the potential to serve as nutrient filters for surface and ground water due to their topographic location. We investigated a riparian wetland that had been receiving intermittent inputs of NO3- and PO43- during storm runoff events to determine the mechanisms of nutrient attenuation in the wetland soils. Few studies have shown whether infrequent pulses of NO3- are sufficient to maintain substantial denitrifying communities. Denitrification rates were highest at the upstream side of the wetland where nutrient-rich runoff first enters the wetland (17-58 μg N2O-N kg soil-1 h-1) and decreased further into the wetland. Carbon limitation for denitrification was minor in the wetland soils. Samples not amended with dextrose had 75% of the denitrification rate of samples with excess dextrose C. Phosphate sorption isotherms suggested that the wetland soils had a high capacity for P retention. The calculated soil PO4-3 concentration that would yield an equilibrium aqueous PO4-3 concentration of 0.05 mg P L-1 was found to be 100 times greater than the soil PO4-3 concentration at the time of sampling. This indicated that the wetland could retain a large additional mass of PO4-3 concentrations above USEPA recommended levels for lentic waters. These results demonstrated that denitrification can be substantial in systems receiving pulsed NO3- inputs and that sorption could account for extensive PO4-3 attenuation observed at this site." |
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| Language: | English |
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| References: | 20 |
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| See Also: | Other items relating to: Buffer Zones |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Casey, R. E., M. D. Taylor, and S. J. Klaine. 2001. Mechanisms of nutrient attenuation in a subsurface flow riparian wetland. J. Environ. Qual. 30(5):p. 1732-1737. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/30/5/1732
Last checked: 12/14/2016
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https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1732
Last checked: 12/14/2016
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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