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Denitrification in nitrate-rich streams: application of N2:Ar and 15N-tracer methods in intact cores

Dates

Year
2006

Citation

Smith, Lesley K, Voytek, Mary A, Böhlke, John Karl, and Harvey, Judson W, 2006, Denitrification in nitrate-rich streams: application of N2:Ar and 15N-tracer methods in intact cores: Ecological applications: a publication of the Ecological Society of America, v. 16, iss. 6, p. 2191-2207.

Summary

Rates of benthic denitrification were measured using two techniques, membrane inlet mass spectrometry (MIMS) and isotope ratio mass spectrometry (IRMS), applied to sediment cores from two NO3(-)-rich streams draining agricultural land in the upper Mississippi River Basin. Denitrification was estimated simultaneously from measurements of N2:Ar (MIMS) and 15N[N2] (IRMS) after the addition of low-level 15NO3- tracer (15N:N = 0.03-0.08) in stream water overlying intact sediment cores. Denitrification rates ranged from about 0 to 4400 micromol N x m(-2) x h(-1) in Sugar Creek and from 0 to 1300 micromol N x m(-2) x h(-1) in Iroquois River, the latter of which possesses greater streamflow discharge and a more homogeneous streambed and water [...]

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  • USGS National Research Program

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Added to ScienceBase on Fri Apr 19 08:15:08 MDT 2013 by processing file <b>Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/504216b6e4b04b508bfd333b">https://www.sciencebase.gov/catalog/item/504216b6e4b04b508bfd333b</a>

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Citation Extension

journalEcological applications: a publication of the Ecological Society of America
parts
typePages
value2191-2207
typeVolume
value16
typeIssue
value6
citationTypeJournal Article

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