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2. The effect of benthic sediments on the dissolved nutrient concentrations and fluxes sediment-seawater nutrient exchange in the Ancão basin, Ria Formosa, Portugal

Author

Murray, L., Mudge, S., Newton, Alice, and Icely, John

Subjects
Pore water profiles, Intertidal pools, Diffusive fluxes, Phosphate, Nitrate, Ammonium
Abstract

The Ria Formosa is a meso-tidal coastal lagoon experiencing enhanced nutrient concentrations. Assessment of sediment–seawater interaction is essential if nutrient dynamics and the risk of eutrophication are to be fully understood. Pore water concentrations of dissolved inorganic and organic phosphorus, ammonium, nitrate and nitrite were determined in cores from six sites. Changes in nutrients concentrations were measured in intertidal pools on sand and mud between tides. Dissolved inorganic phosphorus (DIP) concentrations (~200 lmol l–1) and effluxes (123 ± 14 lmol m–2 h–1) were greater from sand than mud (37 ± 10 lmol m–2 h–1), possibly due to the binding of P with the

Published
2006

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