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DOI: | 10.2134/jeq2006.0164 |
Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/articles/35/6/2425 Last checked: 11/07/2016 Access conditions: Item is within a limited-access website https://dl.sciencesocieties.org/publications/jeq/pdfs/35/6/2425 Last checked: 11/08/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Hale, Rebecca L.;
Groffman, Peter M. |
Author Affiliation: | Hale: Hampshire College, Amherst, Massaschusetts; Groffman: Institute of Ecosystem Studies, Millbrook, New York |
Title: | Chloride effects on nitrogen dynamics in forested and suburban stream debris dams |
Section: | Technical reports: Wetlands and aquatic processes Other records with the "Technical reports: Wetlands and aquatic processes" Section
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Source: | Journal of Environmental Quality. Vol. 35, No. 6, November/December 2006, p. 2425-2432. |
Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
# of Pages: | 8 |
Keywords: | TIC Keywords: Nitrates; Chlorine; Nitrogen cycle; Streams; Nitrogen; Organic matter; Enzymes; Watersheds
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Abstract/Contents: | "Organic debris dams (accumulations of organic material) can function as "hotspots" of nitrogen (N) processing in streams. Surburban streams are often characterized by high flows that prevent the accumulation of organic debris and by elevated concentrations of solutes, especially nitrate (NO3-) and chloride (Cl-). In this study we (1) studied the effects of urbanization on the extent and characteristics of debris dams in large and small streams and (2) evaluated the effects of NO3- and Cl- on rates of N cycle processes in these debris dams. In some suburban streams debris dams were small and rare, but in others factors that reduce the effects of high stream flows fostered the maintenance of debris dams. Ambient denitrification enzyme activity (DEA) in these suburban and forested streams was positively correlated with stream NO3- concentrations. In laboratory microcosms, DEA in debris dam material from a forested reference stream was increased by NO3- additions. Chloride additions constrained the response of DEA to NO3- additions in material from the forested stream, but had no effect on DEA in material from streams with a history of high Cl- levels. Chloride additions changed the sign of net N mineralization from negative (consumption of inorganic N) to positive in debris dam material from the forested reference stream, but had no effect on net mineralization in material from streams with a history of exposure to Cl-. Understanding the factors regulating the maintenance and N cycling activity of organic debris, and incorporating them into urban stream management plans could have important effects on N dynamics in suburban watersheds." |
Language: | English |
References: | 43 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Hale, R. L., and P. M. Groffman. 2006. Chloride effects on nitrogen dynamics in forested and suburban stream debris dams. J. Environ. Qual. 35(6):p. 2425-2432. |
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| DOI: 10.2134/jeq2006.0164 |
| Web URL(s): https://dl.sciencesocieties.org/publications/jeq/articles/35/6/2425 Last checked: 11/07/2016 Access conditions: Item is within a limited-access website https://dl.sciencesocieties.org/publications/jeq/pdfs/35/6/2425 Last checked: 11/08/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: S 900 .J6 |
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