Aluminum in Seawater: Control by Biological Activity

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Science  10 Feb 1978:
Vol. 199, Issue 4329, pp. 680-682
DOI: 10.1126/science.199.4329.680


The distribution and concentration of dissolved aluminum in a vertical hydrographic profile in the Mediterranean Sea near Corsica are controlled by biological activity. The concentrations of dissolved silica and aluminum covary in the profile and exhibit minima coincident with the seasonal thermocline, a nitrate minimum, and an oxygen maximum. These observations support the hypothesis that the silicon and aluminum cycles in the oceans are linked through the activity of diatoms.