Abstract
Surface temperature, salinity, concentrations of silicate (Si) and nitrate + nitrite (N), and in vivo fluorescence (Fluor) were investigated in the marginal ice zone (MIZ) and the seasonally open oceanic zone (SOOZ) (32–40°E, 64–69°S) from February 23 to 28 1992. In the MIZ the mean Si and N were 67.8 ± 2.2 μM and 32.5 ± 1.7 μM, respectively. There was a trend that low N values coincided with high Fluor values. Observation conducted at one point (64°S, 38°E) revealed a diel variation pattern in Fluor. Applying this pattern of deviation from noon value, all Fluor data were normalized to value at local noon. In the MIZ a significant negative correlation was observed between the normalized Fluor and N but not Si. On the other hand, Si decreased continuously from south to north in the SOOZ and was negatively correlated with the normalized Fluor. Difference in Si concentration was about 30 μM between the sea around 64°S and the MIZ, while the difference in N concentration was estimated as less than 10 μM. If diatoms take up silicate and nitrogen at an approximate ratio of 1:1, additional nitrogenous nutrients other than nitrate and nitrite (e.g. ammonia, urea etc.) would be required. In this case, an f-ratio of lower than 33% is obtained. It is suggested that in the MIZ abundance of phytoplankton community dominated by non-diatom increases utilizing nitrate while in the SOOZ abundance of phytoplankton community dominated by diatoms increases consuming Si and regenerated nitrogen.
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Brzezinski, A. A. (1985): The Si:C:N ratio of marine diatoms: interspecific variability and the effect of some environmental variables. J. Phycol., 21, 347–357.
Cota, G. F. and C. W. Sullivan (1990): Photoadaptaion, growth and production of bottom ice algae in the Antarctic. J. Phycol., 26, 399–411.
DiTullio, G. R. and W. O. Smith, Jr. (1996): Spatial patterns in phytoplankton biomass and pigment distributions in the Ross Sea. J. Geophys. Res., 101, 18467–18477.
Dugdale, R. C. and J. J. Goering (1967): Uptake of new and regenerated forms of nitrogen in primary productivity. Limnol. Oceanogr., 12, 196–206.
Dugdale, R. C. and F. P. Wilkerson (1991): Low specific nitrate uptake rate: a common feature of high-nutrient, low-chlorophyll marine ecosystems. Limnol. Oceanogr., 36, 1678–1688.
Dugdale, R. C. and F. P. Wilkerson (1998): Silicate regulation of new production in the equatorial Pacific upwelling. Nature, 391, 270–273.
Dugdale, R. C., F. P. Wilkerson and H. J. Minas (1995): The role of a silicate pump in driving new production. Deep-Sea Res., 42, 697–719.
El-Sayed, S. Z. (1988): Seasonal and interannual variabilities in Antarctic phytoplankton with reference to krill distribution. p. 101–119. In Antarctic Ocean and Resources Variability, ed. by D. Sahrhage, Springer-Verlag, Berlin.
El-Sayed, S. Z. and S. Taguchi (1981): Primary production and standing crop of phytoplankton along the ice-edge in the Weddell Sea. Deep-Sea Res., 28, 1017–1032.
El-Sayed, S. Z., D. C. Biggs and O. Holm-Hansen (1983): Phytoplankton standing crop, primary productivity, and near-surface nitrogenous nutrient fields in the Ross Sea, Antarctica. Deep-Sea Res., 30, 871–886.
Falkowski, P. and D. A. Kiefer (1985): Chlorophyll a fluorescence in phytoplankton: relationship to photosynthesis and biomass. J. Plankton Res., 7, 715–731.
Fiala, M., M. Semeneh and L. Oriol (1998): Biomass, size fractionated phytoplankton and species composition in the Indian sector of the Southern Ocean during austral summer. J. Mar. Syst., 17, 179–194.
Fukuchi, M. and H. Hattori (1987): Surface water monitoring system installed on board the icebreaker Shirase. Proc. NIPR Symp. Polar Biol., 1, 47–55.
Glibert, P. M., D. C. Biggs and J. J. McCarthy (1982): Utilization of ammonium and nitrate during the austral summer in the Scotia Sea. Deep-Sea Res., 29, 837–850.
Goeyens, L., M. Semeneh, M. E. M. Baumann, E. Elskens, D. Shopova and F. Dehairs (1998): Phytoplanktonic nutrient utilisation and nutrient signature in the Southern Ocean. J. Mar. Syst., 17, 143–157.
Hasumoto, H., M. Watanabe, C. Igarashi and S. Watanabe (1996): Oceanographic Data. p. 106–135. In Preliminary Report of the R/V Hakuho Maru Cruise KH–94–4, ed. by K. Kawaguchi, Ocean Research Institute, University of Tokyo.
Holm-Hansen, O., D. D. Hewes, V. E. Villafañe, E. W. Helbling, N. Silva and T. Amos (1997): Distribution of phytoplankton and nutrients in relation to different water masses in the area around Elephant Island, Antarctica. Polar Biol., 18, 145–153.
Icebreaker Shirase (1992): Reports of Activities during the 33rd Japanese Antarctic Research Expedition. Icebreaker Shirase, Yokosuka, 247 pp. (in Japanese).
Jacques, G. and M. Fukuchi (1994): Phytoplankton in the Indian Antarctic Ocean. p. 63–78. In Southern Ocean Ecology: The BIOMASS Perspective, ed. by S. E. El-Sayed, Cambridge Univ. Press, Cambridge.
Japan Meteorological Agency (1990): Methods in Oceanographic Observations. Japan Meteorological Association, Tokyo, 428 pp. (in Japanese).
Jones, E. P., D. M. Nelson and P. Treguer (1990): 8. Chemical Oceanography. p. 407–476. In Polar Oceanography Part B Chemistry, Biology, and Geology, ed. by W. O. Smith, Jr., Academic Press, San Diego.
Kamykowski, D. and S. J. Zentara (1985): Nitrate and silicic acid in the world ocean: patterns and processes. Mar. Ecol. Prog. Ser., 26, 47–59.
Kamykowski, D. and S. J. Zentara (1989): Circumpolar plant nutrient covariation in the Southern Ocean: patterns and processes. Mar. Ecol. Prog. Ser., 58, 101–111.
Kang, S. H. and G. A. Fryxell (1993): Phytoplankton in the Weddell Sea, Antarctica: composition, abundance and distribution in water-column assemblage of the marginal ice-edge zone during austral autumn. Mar. Biol., 116, 335–348.
Koike, I., O. Holm-Hansen and D. C. Biggs (1986): Inorganic nitrogen metabolism by Antarctic phytoplankton with special reference to ammonium cycling. Mar. Ecol. Prog. Ser., 30, 105–116.
Kopczynska, E. E., L. H. Weber and S. Z. El-Sayed (1986): Phytoplankton species composition and abundance in the Indian Sector of the Antarctic Ocean. Polar Biol., 6, 161–169.
Kopczynska, E. E., L. Goeyens, M. Semeneh and F. Dehairs (1995): Phytoplankton composition and cell carbon distribution in Prydz Bay, Antarctica: relation to organic particulate matter and its δ 13 values. J. Plankton Res., 17, 685–707.
Le Jehan, S. and P. Tréguer (1983): Uptake and regeneration ΔSi/ΔN/ΔP ratios in the Indian sector of the Southern Ocean. Originality of the biological cycle of silicon. Polar Biol., 2, 127–136.
Lutjeharms, J. R. E., N. M. Walters and B. R. Allanson (1985): Oceanic frontal systems and biological enhancement. p. 11–21. In Antarctic Nutrient Cycles and Food Webs, ed. by W. R. Siegfried, P. R. Condy and R. M. Laws, Springer-Verlag, Berlin.
Odate, T. and M. Fukuchi (1995): Physical and chemical properties of surface water in the Southern Ocean in summer 1991/92. Proc. NIPR Symp. Polar Biol., 8, 77–85.
Olson, R. J. (1980): Nitrate and ammonium uptake in Antarctic waters. Limnol. Oceanogr., 25, 1064–1074.
Paasche, E. (1980): Silicon. p. 259–284. In The Physiological Ecology of Phytoplankton, ed. by I. Morris, Univ. California Press, Berkeley and Los Angeles.
Palmisano, A. C., J. B. SooHoo, S. L. SooHoo, S. T. Kottmeier, L. L. Craft and C. W. Sullivan (1986): Photoadaptaion in Phaeocystis pouchetii advected underneath annual sea ice in McMurdo Sound, Antarctica. J. Plankton Res., 8, 891–906.
Prézelin, B. B. and A. C. Ley (1980): Photosynthesis and chlorophyll a fluorescence rhythms of marine phytoplankton. Mar. Biol., 56, 295–307.
Reeburgh, W. S. (1984): Fluxes associated with brine motion in growing sea ice. Polar Biol., 3, 29–33.
Ryther, J. H. (1969): Photosynthesis and fish production in the sea. Science, 166, 72–76.
Semeneh, M., F. Dehairs, M. Elskens, M. E. M. Baumann, E. E. Kopczynska, C. Lancelot and L. Goeyens (1998): Nitrogen uptake regime and phytoplankton community structure in the Atlantic and Indian sector of the Southern Ocean. J. Mar. Syst., 17, 159–177.
Smetacek, V., R. Scharek, L. I. Gordon, H. Eicken, E. Fahrbach, G. Rohardt and S. Moores (1992): Early spring phytoplankton blooms in ice platelet layers of the southern Weddell Sea, Antarctica. Deep-Sea Res., 39, 153–168.
Smith, W. O., Jr. and D. M. Nelson (1985): Phytoplankton bloom produced by a receding ice edge in Ross Sea: Spatial coherence with density field. Science, 227, 163–166.
Smith, W. O., Jr. and D. M. Nelson (1990): Phytoplankton growth and new production in the Weddell Sea marginal ice zone in the austral spring and autumn. Limnol. Oceanogr., 35, 809–821.
Sullivan, C. W., C. R. McClain, J. C. Comiso and W. O. Smith, Jr. (1988): Phytoplankton standing crops within an Antarctic ice edge assessed by satellite remote sensing. J. Geophys. Res., 93, 12487–12498.
Sverdrup, H. V. (1955): The place of physical oceanography in oceanographic research. J. Mar. Res., 14, 287–294.
Tréguer, P. and G. Jacques (1992): Dynamics of nutrients and phytoplankton, and fluxes of carbon, nitrogen and silicon in the Antarctic Ocean. Polar Biol., 12, 149–162.
Weber, L. H. and S. Z. El-Sayed (1985): Spatial variability of phytoplankton and the distribution and abundance of Krill in the Indian sector of the Southern Ocean. p. 284–293. In Antarctic Nutrient Cycles and Food Webs, ed. by W. R. Siegfried, P. R. Condy and R. M. Laws, Springer-Verlag, Berlin.
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Odate, T., Hirawake, T., Tanimura, A. et al. Spatial Patterns in Nutrient and In Vivo Fluorescence Distributions in the Marginal Ice Zone and the Seasonally Open Oceanic Zone in the Indian Sector of the Antarctic Ocean, in Austral Summer. Journal of Oceanography 56, 185–196 (2000). https://doi.org/10.1023/A:1011187229918
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DOI: https://doi.org/10.1023/A:1011187229918