Variation of the phytoplankton community across the subtropical convergence zone in the west pacific sector of the southern ocean during early austral Summer 1995/6 |
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Authors: | Hak Young Lee Richard M Greene |
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Institution: | (1) Department of Biology, Pusan National University, 609-735 Pusan, Korea;(2) Department of Oceanography, Texas A&M University, College Station, TX77843 |
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Abstract: | Phytoplankton of the Southern Ocean, 140–148°E and 40–53°S, was sampled from early austral summer Nov. 1995 to Dec. 1995 to
examine cell abundance, cell volume and biomass (cell carbon) distribution across the fronts. A total of 90 phytoplankton
taxa were identified. They were 50 diatoms, 37 dinoflagellates, 2 silicoflagellates, and 1 prymnesiophyte. 73 species were
observed from north of the subtropical convergence zone and 71 species from south of the subtropical convergence zone.Pseudonitzschia spp. was the most widely distributed species. Nanoplankton predominated cell number of phytoplankton throughout the stations.
The abundance of diatoms was higher than that of dinofiagellates. Total biomass profiles were dependent to microphytoplankton
biomass. Maximum cell number and biomass were observed from subsurface layer. Phytoplankton community changed across the subtropical
convergence zone and 50–53°S (antarctic convergence zone), and physicoehemical factors seem to controll the distribution. |
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Keywords: | southern ocean phytoplankton biomass subtropical convergence zone |
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