Marine Biology

, Volume 98, Issue 2, pp 263–269 | Cite as

Distribution and abundance of choanoflagellates (Acanthoecidae) across the ice-edge zone in the Weddell Sea, Antarctica

  • K. R. Buck
  • D. L. Garrison


Choanoflagellates are thought to be an important component of oceanic microbial food webs, but little quantitative data exists on their abundance,, distribution, or relationship to potential food sources. In an Antarctic ice edge zone (northern Weddell Sea, March 1986), choanoflagellate abundance varied over two orders of magnitude in the upper 100 m. The lowest abundances were recorded at the bottom of the water column under ice cover and the highest abundances occurred in the upper 30 m of open water. Species that were predominantly in colonies dominated the open-water samples. Abundances of total choanoflagellates and some individual species were correlated with primary and secondary biomass and production, indicating a response to gradients in potential food sources. This suggests that choanoflagellates are tightly coupled with their food sources and supports the contention that they may an important link between bacteria-sized particles and metazoan grazers.


Biomass Water Column Food Source Lower Abundance Open Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Literature cited

  1. Anderson, P., Fenchel, T (1985). Bacterivory by microheterotrophic flagellates in seawater samples. Limnol. Oceanogr. 30: 198–202Google Scholar
  2. Azam, F., Fenchel, T., Field, J. G., Gray, J. S., Meyer-Reil, L. A., Thingstad, F. (1983). The ecological role of water-column microbes in the sea. Mar. Ecol. Prog. Ser. 10: 257–263Google Scholar
  3. Beers, J. R., Reid, F. M. H., Stewart, G. L. (1980). Microplankton population structure in southern California nearshore waters in late spring. Mar. Biol. 60: 209–226Google Scholar
  4. Booth, B. C., Lewin, J., Norris, R. E. (1980). Nanoplankton species predominant in the subarctic Pacific in May and June 1978. Deep-Sea Res. 29: 185–200Google Scholar
  5. Buck, K. R. (1981). A study of choanoflagellates (Acanthoecidae) from the Weddell Sea, including a description of Diaphanoeca multiannulata n. sp. J. Protozool. 28: 47–54Google Scholar
  6. Buck, K. R., Garrison, D. L. (1983). Protists from the ice edge region of the Weddell Sea. Deep-Sea Res. 30: 1261–1277Google Scholar
  7. Caron, D. A. (1983). Technique for enumeration of heterotrophic and phototrophic nanoplankton, using epifluorescent microscopy, and comparison with other techniques. Appl. envirl Microbiol. 46: 491–498Google Scholar
  8. Davis, P. G., Sieburth, J. M. (1982). Differentiation of phototrophic and heterotrophic nanoplankton populations in marine waters by epifluorescence microscopy. Annls Inst. océanogr., Paris (N.S.) 58: 249–260Google Scholar
  9. Eppley, R. W., Reid, F. M. H., Strickland, J. D. H. (1970). Estimates of phytoplankton crop size, growth rate, and primary production. In: Strickland, J. D. H. (ed.) The ecology of the plankton off La Jolla, California, in the period April through September, 1967. University of California Press, Berkley, California, p. 33–42Google Scholar
  10. Fenchel, T. (1982a). Ecology of heterotrophic microflagellates. I. Some important forms and their functional morphology. Mar. Ecol. Prog. Ser. 8: 211–223Google Scholar
  11. Fenchel, T. (1982b). Ecology of heterotrophic microflagellates. II. Bioenergetics and growth. Mar. Ecol. Prog. Ser. 8: 225–231Google Scholar
  12. Fenchel, T. (1982c). Ecology of heterotrophic micro-flagellates. IV. Quantitative occurrence and importance as bacterial consumers. Mar. Ecol. Prog. Ser. 9: 35–42Google Scholar
  13. Fryxell, G. A., Theriot, E. C., Buck, K. R. (1984). Phytoplankton, ice algae and choanoflagellates from AMERIEZ, the southern Atlantic and Indian Oceans. Antarctic. J. U.S. 19: 107–109Google Scholar
  14. Gold, K. (1976). Methods for preserving Tintinnida. In: Steedman, H. F. (ed.) Zooplankton fixation and preservation. UNESCO, Paris, France, p. 236–239Google Scholar
  15. Haas, L. W. (1982). Improved epifluorescence microscopy for observing planktonic micro-organisms. Annls Inst. Océanogr., Paris (N.S.) 58: 261–266Google Scholar
  16. Hewes, C. D., Holm-Hansen, O., Sakhaug, E. (1985). Alternate carbon pathways at lower trophic levels in the antarctic food web. In: Siegrid, W. R., Condy, P. R., Laws, R. M. (eds.) Antarctic nutrient cycles and food webs. Springer-Verlag, Berlin, Heidelberg, p. 277–283Google Scholar
  17. Laval, M. (1971). Ultrastructure et mode de nutrition du choanoflagelle Salpingoeca pelagica sp. nov. Comparison avec les choanocytes des Spongaires. Protistologica 7: 325–336Google Scholar
  18. Leadbeater, B. S. C. (1981). Ultrastructure and deposition of silica in loricate choanoflagellates. In: Simpson, T. L., Volcani, B. E. (eds.) Silicon and siliceous structures in biological systems. Springer-Verlag, New York, p. 295–322Google Scholar
  19. Leadbeater, B. S. C., Morton, C. (1974). A microscopical study of a marine species of Codosiga James-Clark (Choanoflagellata) with special reference to ingestion of bacteria. Biol. J. Linn. Soc. 6: 337–347Google Scholar
  20. Lund, J. W. G., Kipling, C., Le Cren, E. D. (1958). The inverted microscope method of estimating algal numbers and the statistical basis of estimations by counting. Hydrobiologia 11: 143–170Google Scholar
  21. Marchant, H. J. (1985). Choanoflagellates in the antarctic marine food chain. In: Siegrid, W. R., Condy, P. R., Laws, R. M. (eds.) Antarctic nutrient cycles and food webs. Springer-Verlag, Berlin, Heidelberg, p. 271–276Google Scholar
  22. Marchant, H. J., Nash, G. V. (1986). Electron microscopy of gut contents and faeces of Euphausia superba Dana. Mem. natn. Inst. polar Res., Tokyo 40: 167–177Google Scholar
  23. McManus, G. B., Fuhrman, J. A. (1986). Bacterivory in seawater studied with the use of inert fluorescent particles. Limnol. Oceanogr. 31: 420–426Google Scholar
  24. Meyer, M. A., El-Sayed, S. Z. (1983). Grazing of Euphausia superba Dana on natural phytoplankton populations. Polar Biol 1: 193–203Google Scholar
  25. Quetin, L. B., Ross, R. M. (1985). Feeding by Antarctic krill Euphausia superba: does size matter? In: Siegrid, W. R., Condy, P. R., Laws, R. M. (eds.) Antarctic nutrient cycles and food webs. Springer-Verlag, Berlin Heidelberg, p. 373–377Google Scholar
  26. Sieburth, J. (1979). Sea microbes. Oxford University Press, New YorkGoogle Scholar
  27. Sieburth, J., Davis, P. G. (1982). The role of heterotrophic nanoplankton in the grazing of planktonic bacteria in the Sargasso and Caribbean Seas. Annls Inst. Océanogr., Paris (N.S.) 58: 285–296Google Scholar
  28. Silver, M. W., Mitchell, J. G., Ringo, D. L. (1980). Siliceous nanoplankton. II. Newly discovered cysts and abundant choanoflagellates from the Weddell Sea, Antarctica. Mar. Biol. 58: 211–217Google Scholar
  29. Smith, W. O., Nelson, D. M. (1985). Phytoplankton biomass near a receding ice-edge in the Ross Sea. In: Siegrid, W. R., Condy, P. R., Laws, R. M. (eds.) Antarctic nutrient cycles and food webs. Springer-Verlag, Berlin, Heidelberg, p. 70–77Google Scholar
  30. Sorokin, Y. I., Kogelschatz, J. E. (1979). Analysis of heterotrophic microplankton in an upwelling area. Hydrobiologia 66: 195–208Google Scholar
  31. Sullivan, C. W., Ainley, D. G. (1987). AMERIEZ 1986: a summary of activities on board the R/V Melville and USCGC Glacier: Antarctic J. U.S. (In press)Google Scholar
  32. Takahashi, E. (1981). Loricate and scale bearing protists from Lutzow-Holm Bay, Antarctica I. Species of the Acanthoecidae and the Centrohelida found at a site selected on the fast ice. Antarctic Rec. 73: 1–22Google Scholar
  33. Tanoue, E., Hara, S. (1986). Ecological implications of fecal pellets produced by the Antarctic krill Euphausia superba in the Antarctic Ocean. Mar. Biol. 91: 359–369Google Scholar
  34. Wilson, D. L., Smith, W. O., Nelson, D. M. (1986). Phytoplankton bloom dynamics of the western Ross Sea ice edge.-I. Primary productivity and species specific production. Deep-Sea Res. 33: 1375–1387Google Scholar
  35. Williams, P. J. (1984). Bacterial production in the marine food chain: the emperor's new suit of clothes? In: Fasham, M. J. (ed.) Flow of energy and materials in marine ecosystems: theory and practice. Plenum Press, New York, p. 271–300Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • K. R. Buck
    • 1
  • D. L. Garrison
    • 1
  1. 1.Institute of Marine SciencesUniversity of CaliforniaSanta CruzUSA

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