Primary productivity and phytoplankton pigment measurements in the North Sea, supplement to: Gieskes, W W C; Kraay, Gijsbert W (1980): Primary productivity and phytoplankton pigment measurements in the northern North Sea during FLEX `76. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe A Allgemeines, Physik und Chemie des Meeres, Gebrüder Bornträger, Berlin, Stuttgart, A22, 105-112

W W C Gieskes & Gijsbert W Kraay
During the culmination of the phytoplankton spring bloom in the Fladen Ground area in April-Mai 1976, gross primary production was between 1500 and 2000 mg particulate C m**-2 day**-1, at a crop density (mainly diatoms of the genus Chaetoceros) of about 1500-3500 mg C m**-2. Estimates of the C:chlorophyll a ratio in living cells were much lower than those reported in the literature, possibly because part of what is measured as "chlorophyll a" by the...
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