Size composition of phytoplankton in the western subarctic gyre in july 1997
1999
Hashimoto, S. (National Research Inst. of Far Seas Fisheries, Shimizu, Shizuoka (Japan)) | Shiomoto, A.
Size compositions (2, 2-10 and 10 mum) of phytoplankton biomass (chlorophyll alpha concentration) were investigated within the euphotic layer (100, 30, 10, and 1 % light depths) in the Western Subarctic Gyre in July 1997. Mean concentrations of the total, 2, 2-10 and 10 mum fractions were 1.71, 0.85, 0.38, and 0.48 mug 1(-1), respectively. The mean relative compositions of the 2, 2-10 and 10 mum fractions were 50, 22 and 28 %, respectively, with the 2 mum fraction generally predominated. Moreover, compared to previous results from the Alaskan Gyre, the total and size-fractionated chlorophyll alpha concentrations were higher in the Western Subarctic Gyre than in the Alaskan Gyre. The relative composition of the 10 mum fraction in the Western Subarctic Gyre (28 %) was approximately twice that of the Alaskan Gyre (13 %)
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