Increase of Nitrous Oxide Flux to the Atmosphere Upon Nitrogen Addition to Red Mangrove Sediments

Nitrous oxide sediment/air flux was assessed as a function of nitrogen addition in mangrove sediments in Puerto Rico. Fluxes were enhanced with both nitrate and ammonium loading, and the highest fluxes were recorded with ammonium addition and saturation was attained with additions of 0.9 mol/m super...

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Published inMarine pollution bulletin Vol. 44; no. 10; p. 992
Main Authors Munoz-Hincapie, Milton, Morell, Julio M, Corredor, Jorge E
Format Journal Article
LanguageEnglish
Published 01.10.2002
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Summary:Nitrous oxide sediment/air flux was assessed as a function of nitrogen addition in mangrove sediments in Puerto Rico. Fluxes were enhanced with both nitrate and ammonium loading, and the highest fluxes were recorded with ammonium addition and saturation was attained with additions of 0.9 mol/m super(2). The maximum flux after ammonium addition was 1785 times greater relative to control plots and 4.5 times greater during low tide than with equivalent ammonium addition at high tide. Exponential growth resulted from nitrate enrichment, with maximal mean flux of 36.7 mu mol/m super(2)/h at 1.9 mol/m super(2). Mangrove sediments were shown to represent a major source of global atmospheric nitrous oxide.
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ISSN:0025-326X