ALBERT

Description: The distribution of the particulate organic carbon and nitrogen, and of the dissolved organic carbon as a function of depth and of time is investigated. A common pattern of these distributions is found with certain deviations from a mean value. The ratio N/C (particulate) is calculated. The variation of this parameter with depth shows a maximum at 10 m depth indicating increased biological activity. Also calculated are the ratios and the correlation coefficients between the concentrations of dissolved and particulate organic carbon and between the protein content of the particulate organic matter and its organic nitrogen content. Conclusions on the biochemistry of the phytoplankton are drawn from these computations. Die Veränderlichkeit der Konzentration an partikularem organischen Kohlenstoff und Stickstoff und gelöstem organischen Kohlenstoff mit der Tiefe und mit der Zeit werden untersucht. Die Veränderlichkeit dieser Parameter mit der Tiefe hat zu verschiedenen Zeiten ein ähnliches Aussehen mit gewissen Abweichungen von einem Mittelwert. Das Verhältnis N/C der partikulären Substanz wurde berechnet. Die Tiefenverteilung dieses Parameters hat ein Maximum in 10 m Tiefe, das erhöhte biologische Aktivität anzeigt. Ebenfalls berechnet werden die Verhältnisse zwischen den Konzentrationen von partikularem und von gelöstem organischen Kohlenstoff und der Korrelationskoeffizient zwischen beiden Größen. Die gleichen Berechnungen werden angestellt mit dem Proteingehalt der partikulären Substanz und ihrem Gehalt an organisch gebundenen Stickstoff. Aus diesen Berechnungen werden Schlüsse gezogen über die Biochemie des Phytoplanktons.

Description: Along three sections and al a one day permanent station chemical parameters (P04, Si04, N02, N03, NH3, and 02) were determined from NANSEN bottle samples. Significant fluctuations of some of these parameters were observed. From a moored current meter array the current field was determined. It was coupled to the concentrations observed at the permanent station. The horizontal gradients of chemical components showed values up to 50% in less than 500 m distance. By use of the diffusion theory some estimates on the time scale of biochemical processes are presented. From the entire set of about 400 observations the mean relation between phosphate and silicate was found to be linear. Nitrate seemed to be the growth limiting factor. The mean relations between phosphate and nitrate and silicate and nitrate respectively differ considerably from a linear function. The oxidative ratios for nitrate, phosphate and silicate have been calculated and the following combination has been found from these regressions: ΔAOU : ΔP : ΔN : ΔSi = 276 : 1.2 : 14.7 : 7.2