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Flux 'n stock around the clock: a 24-h survey of carbon and nutrient dynamics in the Spuikom lagoon (Ostend, Belgium) ECOMAMA students; Mubiana, V.; Beenaerts, N. (2003). Flux 'n stock around the clock: a 24-h survey of carbon and nutrient dynamics in the Spuikom lagoon (Ostend, Belgium), in: Mees, J. et al. VLIZ Young Scientists' Day, Brugge, Belgium 28 February 2003: book of abstracts. VLIZ Special Publication, 12: pp. 36 In: Mees, J.; Seys, J. (Ed.) (2003). VLIZ Young Scientists' Day, Brugge, Belgium 28 February 2003: book of abstracts. VLIZ Special Publication, 12. Vlaams Instituut voor de Zee: Oostende. VIII, 69 pp., meer In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 375159 [ download pdf ]
Documenttype: Samenvatting

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Trefwoorden

Anchorages > Harbours Aquatic communities > Plankton > Phytoplankton Biological production > Primary production Chemical elements > Nonmetals > Carbon Cleaning Nutrients (mineral) Properties > Physical properties > Thermodynamic properties > Temperature Properties > Physical properties > Turbidity Stocks ANE, België [Marine Regions]; ANE, België, Oostende [Marine Regions]; België [Marine Regions]; België, Oostende [Marine Regions] Brak water; Zoet water

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ECOMAMA students, meer Mubiana, V. Beenaerts, N.

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Abstract

The Sluice Dock (Spuikom) is an artificial lagoon initially created to aid periodic cleaning of the harbour of Ostend. The poster presents results of a study conducted by an international group of students (1st year MSc in ECOlogical Marine MAnagement) mainly from developing countries. The study looked at the stocks and fluxes of carbon and nutrients in the water column of the lagoon during the spring of 2002 and the factors that determine carbon gain or loss between surface, bottom, near shore and off-shore waters. The investigation involved measurements of nutrient concentrations, primary productivity, plankton standing stocks and environmental parameters (temperature, sunlight and turbidity) over a 24-h period. Concentrations of the major nutrients were typical of highly enriched (from run-off and human influences) marine ecosystems with values ranging from 2.3-1.4 mg/m² for P, 29-16 mg/m² for Si and 149-79 mg/m² for NH3. The study concluded that generally nutrient concentrations did not appear to vary significantly over 24-h period though there was a slight trend of higher nutrient concentrations in the early morning hours (at sunrise), which tended to decrease with day-light hours. This phenomenon was probably due to increased nutrient uptake by phytoplankton during primary production. Fluxes of carbon in the lagoon were mostly correlated with changes in primary productivity and zooplankton activity. Due to the shallowness of the lagoon and moderate surface winds, there were no pronounced vertical gradients in terms of primary production and nutrient concentrations. Generally, trends observed in the Spuikom lagoon correspond with data typically measured in shallow temperate lagoons.

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