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Nitrate removal in stream ecosystems measured by <sup>15</sup>N addition experiments: Denitrification

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Citation

Nitrate removal in stream ecosystems measured by <sup>15</sup>N addition experiments: Denitrification; 2009; Article; Journal; Limnology and Oceanography; Mulholland, P. J.; Hall, Jr. , R. O.; Sobota, D. J.; Dodds, W. K.; Findlay, S. E. G.; Grimm, N. B.; Hamilton, S. K.; McDowell, W. H.; O'Brien, J. M.; Tank, J. L.; Ashkenas, L. R.; Cooper, L. W.; Dahm, C. N.; Gregory, S. V.; Johnson, S. L.; Meyer, J. L.; Peterson, B. J.; Poole, G. C.; Valett, H. M.; Webster, J. R.; Arango, C. P.; Beaulieu, J. J.; Bernot, M. J.; Burgin, A. J.; Crenshaw, C. L.; Helton, A. M.; Johnson, L. T.; Niederlehner, B. R.; Potter, J. D.; Sheibley, R. W.; Thomasn, S. M.

Summary

We measured denitrification rates using a field 15N-NO- 3 tracer-addition approach in a large, cross-site study of nitrate uptake in reference, agricultural, and suburban-urban streams. We measured denitrification rates in 49 of 72 streams studied. Uptake length due to denitrification (SWden) ranged from 89 m to 184 km (median of 9050 m) and there were no significant differences among regions or land-use categories, likely because of the wide range of conditions within each region and land use. N2 production rates far exceeded N2O production rates in all streams. The fraction of total NO-3 removal from water due to denitrification ranged from 0.5% to 100% among streams (median of 16%), and was related to NHz 4 concentration and ecosystem [...]

Contacts

Author :
P.J. Mulholland, R.O. Hall Jr., D.J. Sobota, W.K. Dodds, S.E.G. Findlay, N. B. Grimm, S.K. Hamilton, W.H. McDowell, J. M. O'Brien, J.L. Tank, L.R. Ashkenas, L.W. Cooper, Clifford N. Dahm, S.V. Gregory, S.L. Johnson, J.L. Meyer, B.J. Peterson, G.C. Poole, H.M. Valett, J.R. Webster, C.P. Arango, J.J. Beaulieu, M.J. Bernot, A.J. Burgin, C.L. Crenshaw, A.M. Helton, L.T. Johnson, B.R. Niederlehner, J.D. Potter, R.W. Sheibley, S.M. Thomasn
Publisher :
American Society of Limnology and Oceanography

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Type Scheme Key
local-index unknown 70034859
local-pk unknown 70034859
series unknown Limnology and Oceanography

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citationTypeArticle
journalLimnology and Oceanography
languageEnglish
parts
typevolume
value54
typeissue
value3

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