Concentrations of particulate matter in the North Frisian Wadden Sea

The amount of particulate matter for different size classes was determined in the North Frisian Wadden Sea over a period of 10 months from November 1973 to August 1974. Particle volume, particulate organic carbon and phaeopigment concentrations decrease with advancing season, reaching minima in June. It is concluded that concentrations of particulate matter including chlorophyll were sufficiently high throughout the study period to support the growth and reproduction of appendicularia which abundantly occur in the Wadden Sea.