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Vertical distribution of phytoplankton in the Tropical Atlantic

Т. М. Kovaleva

Institute of Biology of the Southern Seas, 2 Nahimov Avenue, Sevastopol 99011, Ukraine

Summary

Studies in the trade-wind zone of the tropical Atlantic showed that in the region of the North trade-wind current characterized by a rise of deep waters the main phytoplankton mass concentrated within a depth of 25-50 m, in the region of the South trade-wind current (zone of water lowering) — within a depth to 100 m. The values of the phytoplankton number and biomass in the 0—10 m layer at the first station are higher than at the second, which is explained by a higher content of biogens here, in particular, phosphates. Vertical distribution of the main mass of planktonic algae was determined to a considerable extent by the position of the density jump The regions under study had no practical differences as to the species composition of phytoplankton.

Hydrobiological Journal. - 1976. - Vol.12, No.3. - pp.5-11.

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