Nutrient gradients in the Wadden Sea. Götz Flöser, GKSS Research Centre TMAP-Workshop, Hamburg, 29.11.2004. Monitoring in the North Sea. Measuring stations in Niedersachsen not near the mainland. Nutrient budget? Philippart & Cadée, 2000.
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Nutrient gradients in the Wadden Sea
Götz Flöser, GKSS Research Centre
TMAP-Workshop, Hamburg, 29.11.2004
Monitoring in the North Sea
Measuring stations in Niedersachsen
not near the mainland
Philippart & Cadée, 2000
Western Dutch Wadden Sea: Salinity (Zimmermann, 1976)
IJsselmeer influence in Western Dutch Wadden Sea prominent
North German Wadden Sea
Cross-shore profiles in the Niedersachsen Wadden Sea
In Niedersachsen, there is no permanent freshwater source!
Linear y-axis (µmol N/L)
Slope of DIN-curves
Slope of DIP-curves
Nutrient measurements in the Wadden Sea: Correlation with salinity.
Nutrient budget: summer
Nutrient budget: inter-basin exchange is small
Stanev et al., 2003
Sluices: Variability of runoff
Sluices: nutrient concentrations
Exchange with North Sea: Time constant
Exchange constant 3 days
only in winter
3 days exchange
Export of dissolved nutrients
Conceptual model for nutrient dynamics:
Essential assumption: mortality of phytoplankton is depth dependent (filter feeders)
Ebenhöh et al., 2004
What is the essential difference between Niedersachsen and the other two regions??
Can we treat the entire Wadden Sea in the same way?