NDLI: Modeling denitrification in aquatic sediments

Content Provider	Springer Nature Link
Author	Fennel, Katja Brady, Damian DiToro, Dominic Fulweiler, Robinson W. Gardner, Wayne S. Giblin, Anne McCarthy, Mark J. Rao, Alexandra Seitzinger, Sybil Thouvet Korppoo, Marie Tobias, Craig
Copyright Year	2008
Abstract	Sediment denitrification is a major pathway of fixed nitrogen loss from aquatic systems. Due to technical difficulties in measuring this process and its spatial and temporal variability, estimates of local, regional and global denitrification have to rely on a combination of measurements and models. Here we review approaches to describing denitrification in aquatic sediments, ranging from mechanistic diagenetic models to empirical parameterizations of nitrogen fluxes across the sediment-water interface. We also present a compilation of denitrification measurements and ancillary data for different aquatic systems, ranging from freshwater to marine. Based on this data compilation we reevaluate published parameterizations of denitrification. We recommend that future models of denitrification use (1) a combination of mechanistic diagenetic models and measurements where bottom-waters are temporally hypoxic or anoxic, and (2) the much simpler correlations between denitrification and sediment oxygen consumption for oxic bottom waters. For our data set, inclusion of bottom water oxygen and nitrate concentrations in a multivariate regression did not improve the statistical fit.
Starting Page	159
Ending Page	178
Page Count	20
File Format	PDF
ISSN	01682563
Journal	Biogeochemistry
Volume Number	93
Issue Number	1-2
e-ISSN	1573515X
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-12-10
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Denitrification Diagenetic model Sediment Life Sciences Ecosystems Environmental Chemistry Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Environmental Chemistry Water Science and Technology

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