| Autor: | Mario J.C. Laima, Pierre-Guy Sauriau, Dominique Gouleau, Dorota Maksymowska-Brossard, Pierre Richard, Lucette Joassard, Michelle Girard |
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| Rok vydání: | 2002 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences 010604 marine biology & hydrobiology Intertidal zone Sediment Biota 01 natural sciences 6. Clean water Oceanography Deposition (aerosol physics) Sediment–water interface Benthic zone Environmental chemistry Environmental Chemistry Nitrification Bioturbation Geology 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology |
| Zdroj: | Biogeochemistry. 61:115-133 |
| ISSN: | 0168-2563 |
| Popis: | The effects of fluff deposit on benthic biota,NH4+ fluxes and nitrification was studied in thelaboratory using waterlogged and reflooded intertidal sediments fromMarennes-Oleron Bay, France. The fluff deposit was enriched inNH4+ compared to underlying sediments, and promotedchanges of the sediment pH, Eh, C:N ratio, C:chla ratio and the NH4+ efflux tooverlying water. Statistical analysis showed that pore waterNH4+ concentrations were strongly influenced byinteractions between fluff, drying, depth and bioturbation. The fluff depositresulted in anoxia in the top sediments and moved the nitrification zone tosurface layers in fluff. However, the NH4+ enrichment influff did not significantly change actual nitrification rates (range 0–1mmol m−2 d−1) or potentialnitrification rates (range 3–11 mmolNO3− m−2d−1). |
| Databáze: | OpenAIRE |
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