Microelectrode Measurements of Nitrate Gradients in the Littoral and Profundal Sediments of a Meso-Eutrophic Lake (Lake Vechten, The Netherlands)
AUTOR(ES)
Sweerts, Jean-Pierre R. A.
RESUMO
NO3− concentration profiles were measured in the sediments of a meso-eutrophic lake with a newly developed microelectrode. The depth of penetration of NO3− varied from only 1.3 mm in organic-rich profundal silty sediments to 5 mm in organic-poor littoral sandy sediments. The thickness of the zone of denitrification in the organic-rich sediments was <500 μm. Oxygen profiles measured simultaneously revealed that the zone of denitrification was directly adjacent to the aerobic zone. The results demonstrate high denitrification rates (0.26 to 1.31 mmol m−2 day−1) at in situ nitrate concentrations in the overlying water (0.030 mmol liter−1) and limitation of denitrification by nitrate availability.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=184192Documentos Relacionados
- Inorganic Phosphorus Stimulation of Bacterioplankton Production in a Meso-Eutrophic Lake †
- Reduction of Sulfur Compounds in the Sediments of a Eutrophic Lake Basin †
- Intermediary Metabolism of Organic Matter in the Sediments of a Eutrophic Lake †
- Evidence for Microbial Fe(III) Reduction in Anoxic, Mining-Impacted Lake Sediments (Lake Coeur d'Alene, Idaho)
- Comparative Aspects of Sulfur Mineralization in Sediments of a Eutrophic Lake Basin †
