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Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2006): Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.552509, Supplement to: Henjes, J et al. (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791, https://doi.org/10.1016/j.dsr.2007.02.005

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Abstract:
The responses of larger (>50 µm in diameter) protozooplankton groups to a phytoplankton bloom induced by in situ iron fertilization (EisenEx) in the Polar Frontal Zone (PFZ) of the Southern Ocean in austral spring are presented. During the 21 days of the experiment, samples were collected from seven discrete depths in the upper 150 m inside and outside the fertilized patch for the enumeration of acantharia, foraminifera, radiolaria, heliozoa, tintinnid ciliates and aplastidic thecate dinoflagellates. Inside the patch, acantharian numbers increased twofold, but only negligibly in surrounding waters. This finding is of major interest, since acantharia are suggested to be involved in the formation of barite (BaSO_4 ) found in sediments and which is a palaeoindicator of both ancient and modern high productivity regimes. Foraminifera increased significantly in abundance inside and outside the fertilized patch. However the marked increase of juveniles after a full moon event suggests a lunar periodicity in the reproduction cycle of some foraminiferan species rather than a reproductive response to enhanced food availability. In contrast, adult radiolaria showed no clear trend during the experiment, but juveniles increased threefold indicating elevated reproduction. Aplastidic thecate dinoflagellates almost doubled in numbers and biomass, but also increased outside the patch. Tintinnid numbers decreased twofold, although biomass remained constant due to a shift in the size spectrum. Empty tintinnid loricae, however, increased by a factor of two indicating that grazing pressure on this group mainly by copepods intensified during EisenEx. The results show that iron-fertilization experiments can shed light on the biology and the role of these larger protists in pelagic ecosystem which will improve their use as proxies in palaeoceanography.
Project(s):
European Iron Enrichment Experiment in the Southern Ocean (EisenEx)
Coverage:
Median Latitude: -48.077193 * Median Longitude: 20.934070 * South-bound Latitude: -48.584667 * West-bound Longitude: 20.651500 * North-bound Latitude: -47.669000 * East-bound Longitude: 21.229333
Date/Time Start: 2000-11-07T06:37:00 * Date/Time End: 2000-11-29T16:52:00
Event(s):
PS58/009-6 (CTD11) * Latitude: -47.819500 * Longitude: 20.792667 * Date/Time: 2000-11-07T06:37:00 * Elevation: -4929.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 203 m; day: T-2
PS58/011-3 * Latitude: -47.878000 * Longitude: 20.948667 * Date/Time: 2000-11-08T20:55:00 * Elevation: -4498.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 502 m; in patch 1; in/out patch: In; day: T0
PS58/012-4 (CTD15) * Latitude: -48.100333 * Longitude: 20.865500 * Date/Time: 2000-11-09T11:21:00 * Elevation: -4642.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 500 m; out patch 1; in/out patch: Out; day: T1
Size:
38 datasets

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Datasets listed in this publication series

  1. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/009-6. https://doi.org/10.1594/PANGAEA.552386
  2. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/011-3. https://doi.org/10.1594/PANGAEA.552387
  3. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/012-4. https://doi.org/10.1594/PANGAEA.552388
  4. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/014-6. https://doi.org/10.1594/PANGAEA.552389
  5. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/038-7. https://doi.org/10.1594/PANGAEA.552390
  6. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/041-5. https://doi.org/10.1594/PANGAEA.552391
  7. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/042-5. https://doi.org/10.1594/PANGAEA.552392
  8. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/043-4. https://doi.org/10.1594/PANGAEA.552393
  9. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/045-9. https://doi.org/10.1594/PANGAEA.552394
  10. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/046-5. https://doi.org/10.1594/PANGAEA.552395
  11. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/048-5. https://doi.org/10.1594/PANGAEA.552396
  12. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/049-5. https://doi.org/10.1594/PANGAEA.552397
  13. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/061-3. https://doi.org/10.1594/PANGAEA.552398
  14. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/088-7. https://doi.org/10.1594/PANGAEA.552399
  15. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/090-2. https://doi.org/10.1594/PANGAEA.552400
  16. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/091-3. https://doi.org/10.1594/PANGAEA.552401
  17. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/092-6. https://doi.org/10.1594/PANGAEA.552402
  18. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/107-6. https://doi.org/10.1594/PANGAEA.552403
  19. Henjes, J (2006): Large protozoa abundance measured on concentrated water bottle samples at station PS58/108-3. https://doi.org/10.1594/PANGAEA.552404
  20. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/009-6. https://doi.org/10.1594/PANGAEA.552405
  21. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/011-3. https://doi.org/10.1594/PANGAEA.552406
  22. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/012-4. https://doi.org/10.1594/PANGAEA.552407
  23. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/014-6. https://doi.org/10.1594/PANGAEA.552408
  24. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/038-7. https://doi.org/10.1594/PANGAEA.552409
  25. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/041-5. https://doi.org/10.1594/PANGAEA.552410
  26. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/042-5. https://doi.org/10.1594/PANGAEA.552411
  27. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/043-4. https://doi.org/10.1594/PANGAEA.552412
  28. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/045-9. https://doi.org/10.1594/PANGAEA.552414
  29. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/046-5. https://doi.org/10.1594/PANGAEA.552415
  30. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/048-5. https://doi.org/10.1594/PANGAEA.552416
  31. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/049-5. https://doi.org/10.1594/PANGAEA.552417
  32. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/061-3. https://doi.org/10.1594/PANGAEA.552419
  33. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/088-7. https://doi.org/10.1594/PANGAEA.552420
  34. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/090-2. https://doi.org/10.1594/PANGAEA.552421
  35. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/091-3. https://doi.org/10.1594/PANGAEA.552422
  36. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/092-6. https://doi.org/10.1594/PANGAEA.552423
  37. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/107-6. https://doi.org/10.1594/PANGAEA.552424
  38. Henjes, J (2006): Large protozoa biomass measured on concentrated water bottle samples at station PS58/108-3. https://doi.org/10.1594/PANGAEA.552425