Abstract
The surface distribution of netphytoplankton (>20 μm) in the Atlantic sector of the Southern Ocean was investigated along two transects during early and late austral summer 1990/91. Sampling was under-taken at intervals of 60′ of latitude between 34° and 70°S for the analysis of nutrients and for the identification and enumeration of netphytoplankton. Peaks in total diatom abundances were recorded at the Antarctic Polar Front (APF), in the vicinity of the South Sand wich Islands, in the marginal ice zone and in the neritic waters of the Atlantic sector of Antarctica. Cluster analysis indicates the existence of two major zones between Southern Africa and Antarctica. Diatom abundance increased south of the Antarctic Polar From along both transects, which can be partially explained by gradients of silicate concentration. Small chain-forming species (e.g. Fragilariopsis kerguelensis and Nitzschia lineata) dominated the diatom assemblages in early summer, while larger species, such as Rhizosolenia hebetata f. semispina and Corethron criophilum, dominated late summer diatom assemblages. The predominance of typically ice-associated forms in early summer suggests that the release of epontic cells during ice melt provides the initial inoculum for the netphytoplankton biomass. These small diatoms are subsequently replaced by larger species.
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References
Allanson BR, Parker L (1983) Frontal zones, chlorophyll and primary production patterns in the surface waters of the Southern Ocean south of Cape Town. S Afr J Sci 79:153–154
Allanson BR, Hart RC, Lutjeharms JRE (1981) Observations on the nutrients, chlorophyll and primary production of the Southern Ocean south of Africa. S Afr J Antract Res 10:3–14
Berman T, Kimor B (1983) A large scale filtration apparatus for net plankton sampling. J Plankton Res 5:111–116
Boden BP, Duncombe Rae CM, Lutjeharms JRE (1988) The distribution of the diatoms of the south-west Indian Ocean surface waters between Cape Town and the Prince Edward Islands archipelago. S Afr J Sci 84:811–819
Crawford AB (1972) Sea surface temperature measurements by direct sampling. Maritime Weather Office, Youngsfield Cape Town
de Baar HJW, Buma AGJ, Nolting RF, Cadee GC, Jacques G, Treguer PJ (1990) On iron limitation of the Southern Ocean: experimental observations in the Weddell and Scotia Seas. Mar Ecol Prog Ser 65:105–122
El-Sayed SZ (1988) Productivity of the Southern Ocean: A closer look. Comp Biochem Physiol 90(3):489–498
El-Sayed SZ, Weber LH (1982) Spatial and temporal variations in phytoplankton biomass and primary productivity in the South-west Atlantic and Scotia Sea. Polar Biol 1:83–90
Garrison DL (1991) Antarctic sea ice biota. Am Zool 31:17–33
Garrison DL, Buck KR, Gowing MM (1991) Plankton assemblages in the ice edge zone of the Weddell Sea during the austral winter. J Mar Syst 2:123–130
Gowing MM, Garrison DL (1992) Abundance and feeding ecology of larger protozooplankton in the ice edge zone of the Weddell and Scotia Seas during austral winter. Deep-Sea Res 39(5):839–919
Grindley JR, David P (1985) Nutrient upwellings and its effects in the lee of Marion Island. In: Siegfried WR, Condy PR, Laws RM (eds) Antarctic nutrient cycles and food webs. Springer, Berlin Heidelberg, New York
Hansen PJ (1991) Quantitative importance and trophic role of heterotrophic dinoflagellates in a costal and pelagic food web. Mar Ecol Prog Ser 73:253–261
Hayes PK, Whitaker, TM, Fogg GE (1984) The distribution and nutrient status of phytoplankton in the Southern Ocean between 20 and 70°W. Polar Biol 3:153–165
Hewes CD, Holm-Hansen O, Sakshaug E (1983) Nanoplankton and microplankton studies during the circumnavigation cruise. Antarct J US 18:169–171
Hewes CD, Sakshaug E, Reid FMH, Holm-Hansen O (1990) Microbial autotrophic and heterotrophic eucaryotes in Antarctic waters: relationships between biomass and chlorophyll, adenosine triphosphate and particulate organic carbon. Mar Ecol Prog Ser 63:27–35
Holm-Hansen O, Mitchell BG (1991) Spatial and temporal distribution of phytoplankton and primary production in the western Bransfield Strait region. Deep-Sea Res 38:961–980
Jacques G (1983) Some ecophysiological aspects of the Antarctic phytoplankton. Polar Biol 2:27–33
Jacques G (1989) Primary production in the open Antarctic Ocean during the austral summer. A review. Vie Milieu 39:1–17
Jacques G, Panouse M (1991) Biomass and composition of size fractionated phytoplankton in the Weddell-Scotia Confluence area. Polar Biol 11:315–328
Jones EP, Nelson DM, Treguer P (1990) Chemical oceanography. In: Smith WO (ed) Polar oceanography. Part B. Academic Press, New York London
Koroleff F (1983) Determination of ammonia and urea. In: Grasshof K, Gerhardt M, Kremling K (eds) Methods of Seawater analysis Verlag Chemie, Weinheim
Laubscher RK, Perissinotto R, McQuaid CD (1993) Phytoplankton production and biomass at frontal zones in the Atlantic sector of the Southern Ocean. Polar Biol 13:471–481
Legendre L, Legendre P (1983) Numerical Ecology. Elsevier, Amsterdam, New York
le Jehan S, Treguer P (1985) The distribution of inorganic nitrogen, phosphorus, silicon and dissolved organic matter in the surface and deep waters of the Southern Ocean. In: Siegfried WR, Condy PR, Laws RM (eds) Antarctic nutrient cycles and food webs. Springer, Berlin, Heidelberg, New York
Martin JH, Gordon RM, Fitzwater SE (1990) Iron in Antarctic waters. Nature 345:156–158
Mostert SA (1983) Procedures used in South Africa for the automatic photometric determination of micro-nutrients in sea water. S. Afr J Mar Sci 1:189–198
Nelson DM, Smith WO (1986) Phytoplankton bloom dynamics of the western Ross Sea ice edge-II. Mesoscale cycling of nitrogen and silicon. Deep-Sea Res 33:1389–1412
Nelson DM, Smith WO, Muench RD, Gordon LI, Sullivan CW, Husby DM (1989) Particulate matter and nutrient distribution in the ice edge zone of the Weddell Sea: relationship to hydrography during late summer. Deep-Sea Res 36:191–206
Perissinotto R, Laubscher RK, McQuaid CD (1992) Marine productivity (enhancement) around Bouvet and the South Sandwich Islands (Southern Ocean). Mar Ecol Prog Ser 88:41–53
Priddle J, Heywood RB, Theriot E (1986) Some environmental factors influencing phytoplankton in the Southern Ocean around South Georgia. Polar Biol 5:65–79
Sakshaug E, Slagstad D, Holm-Hansen O (1991) Factors controlling the development of phytoplankton blooms in the Antarctic Ocean — a mathematical model. Mar Chem 35:259–271
Samyshev EZ (1991) Antarctic krill and the structure of the plankton community in its area of occurrence (In Russian). Nauka, Moscow
Smith WO (1987) Phytoplankton dynamics in marginal ice zones. Oceanogr Mar Biol Ann Rev 25:11–38
Smith WO, Nelson DM (1986) Importance of ice edge phytoplankton production in the Southern Ocean. BioScience 36:251–257
Smith WO, Keene NK, Comiso JC (1988) Interannual variability in estimated primary productivity of the Antarctic marginal ice zone. In: Sahrhage D (ed) Antarctic Ocean and resources variability. Springer, Berlin Heidelberg, New York
Sommer U, Stabel H (1986) Near surface nutrient and phytoplankton distribution in the Drake Passage during early December. Polar Biol 6:107–110
Strickland JDH, Parsons TR (1968) A practical handbook for sea-water analysis. Bull Fish Res Board Can 167:1–311
Sullivan CW, Arrigo KR, McClain CR, Comiso JC, Firestone J (1993) Distributions of phytoplankton blooms in the Southern Ocean. Science 262:1832–1837
Theriot E, Fryxell G (1985) Multivariate statistical analysis of net diatom species distributions in the southwestern Atlantic and Indian Ocean. Polar Biol 5:23–30
Thorrington-Smith M (1971) West Indian phytoplankton: a numerical investigation of phytogeographic regions and their characteristic phytoplankton associations. Mar Biol 9:115–137
Treguer P, Jacques G (1986) L'Antarctique: un ocean de paradoxes. La Recherche, Paris 178:746–756
Verlencar XN, Somasunder K, Qasim SZ (1990) Regeneration of nutrients and biological productivity in Antarctic waters. Mar Ecol Prog Ser 61:41–59
von Bodungen B, Nöthig E, Sui Q (1988) New production of phytoplankton and sedimentation during summer 1985 in the southeastern Weddell Sea. Comp Biochem Physiol 90(3):475–487
Zernova VV (1970) Phytoplankton of the Southern Ocean. In: Holgate MW (ed) Antarctic ecology. Academic Press, New York, London
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Froneman, P.W., Perissinotto, R., McQuaid, C.D. et al. Summer distribution of netphytoplankton in the Atlantic sector of the Southern Ocean. Polar Biol 15, 77–84 (1995). https://doi.org/10.1007/BF00241045
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DOI: https://doi.org/10.1007/BF00241045