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Schiebel, Ralf; Hemleben, Christoph (2000): Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.728676, Supplement to: Schiebel, R; Hemleben, C (2000): Interannual variability of planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean (JGOFS). Deep Sea Research Part II: Topical Studies in Oceanography, 47(9-11), 1809-1852, https://doi.org/10.1016/S0967-0645(00)00008-4

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Abstract:
Planktic foraminiferal assemblages vary in response to seasonal fluctuations of hydrographic properties, between water masses, and after periodical changes and episodic events (e.g. reproduction, storms). Distinct annual variability of the planktic foraminiferal flux is also known from sediment trap data. In this paper we discuss the short-term impacts on interannual flux rates based on data from opening-closing net hauls obtained between the ocean surface and 500 m water depth. Data were recorded during April, May, June, and August at around 47°N, 20°W (BIOTRANS) in 1988, 1989, 1990, 1992, 1993, and during May 1989 and 1992 at 57°N, 20-22°W. Species assemblages closely resemble each other when comparing the mixed layer fauna with the fauna of the upper 100 m and the upper 500 m of the water column. In addition, species assemblages >100 µm are almost indistinguishable from assemblages that are >125 µm in test size. The standing stock of planktic foraminifers at BIOTRANS can vary by more than one order of magnitude over different years; however, species assemblages may be similar when comparing corresponding seasons. Early summer assemblages (June) are distinctly different from late summer assemblages (August). Significant variations in the species composition during spring (April/May) are independent of the mixed layer depth. Spring assemblages are characterized by high numbers of Globigerinita glutinata. In particular, day-to-day variations of the number of specimens and in species composition may have the same order of magnitude as interannual variations. This appears to be independent of the reproduction cycle. Species assemblages at 47°N and 57°N are similar during spring, although surface water temperatures and salinities differ by up to 10°C and 0.7 (PSU). We suggest that the main factors controlling the planktic foraminiferal fauna are the trophic properties in the upper ocean productive layer.
Planktic foraminiferal carbonate flux as calculated from assemblages reveals large seasonal variations, a quasi-annual periodicity in flux levels, and substantial differences in timing and magnitude of peak fluxes. At the BIOTRANS station, the average annual planktic foraminiferal CaCO3 fluxes at 100 and 500 m depth are estimated to be 22.4 and 10.0 g/m**2/yr, respectively.
Coverage:
Median Latitude: 45.928970 * Median Longitude: -19.431226 * South-bound Latitude: 33.939867 * West-bound Longitude: -22.304000 * North-bound Latitude: 57.995833 * East-bound Longitude: -17.757050
Date/Time Start: 1988-04-08T09:40:00 * Date/Time End: 1993-06-16T08:56:00
Event(s):
FCA97C_MSN1339 (45) * Latitude: 32.661667 * Longitude: -30.585000 * Date/Time: 1997-08-01T16:40:00 * Elevation: -3225.0 m * Location: Azores front * Campaign: FCA97 * Basis: Arquipelago * Method/Device: Multiple opening/closing net (MSN)
FCA97C_MSN1340 (45) * Latitude: 32.662250 * Longitude: -30.587889 * Date/Time: 1997-08-01T17:55:00 * Elevation: -3225.0 m * Location: Azores front * Campaign: FCA97 * Basis: Arquipelago * Method/Device: Multiple opening/closing net (MSN)
FCA97C_MSN1343 (52) * Latitude: 32.101917 * Longitude: -31.664778 * Date/Time: 1997-08-02T19:35:00 * Elevation: -4134.0 m * Location: Azores front * Campaign: FCA97 * Basis: Arquipelago * Method/Device: Multiple opening/closing net (MSN)
Size:
153 datasets

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Datasets listed in this publication series

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  1. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN639. https://doi.org/10.1594/PANGAEA.75854
  2. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN640. https://doi.org/10.1594/PANGAEA.75877
  3. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN640. https://doi.org/10.1594/PANGAEA.75855
  4. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN641. https://doi.org/10.1594/PANGAEA.75878
  5. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN641. https://doi.org/10.1594/PANGAEA.75856
  6. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN642. https://doi.org/10.1594/PANGAEA.75879
  7. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN642. https://doi.org/10.1594/PANGAEA.75857
  8. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN643. https://doi.org/10.1594/PANGAEA.75880
  9. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN643. https://doi.org/10.1594/PANGAEA.75858
  10. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN644. https://doi.org/10.1594/PANGAEA.75881
  11. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN644. https://doi.org/10.1594/PANGAEA.75859
  12. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN647. https://doi.org/10.1594/PANGAEA.75882
  13. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN647. https://doi.org/10.1594/PANGAEA.75860
  14. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN648. https://doi.org/10.1594/PANGAEA.75883
  15. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN648. https://doi.org/10.1594/PANGAEA.75861
  16. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN649. https://doi.org/10.1594/PANGAEA.75884
  17. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN649. https://doi.org/10.1594/PANGAEA.75862
  18. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN650. https://doi.org/10.1594/PANGAEA.75885
  19. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN650. https://doi.org/10.1594/PANGAEA.75863
  20. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN650. https://doi.org/10.1594/PANGAEA.75865
  21. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN651. https://doi.org/10.1594/PANGAEA.75886
  22. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN651. https://doi.org/10.1594/PANGAEA.75866
  23. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN652. https://doi.org/10.1594/PANGAEA.75887
  24. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN652. https://doi.org/10.1594/PANGAEA.75867
  25. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN656. https://doi.org/10.1594/PANGAEA.75888
  26. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN656. https://doi.org/10.1594/PANGAEA.75868
  27. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN657. https://doi.org/10.1594/PANGAEA.75889
  28. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN657. https://doi.org/10.1594/PANGAEA.75869
  29. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet M21/2_MSN658. https://doi.org/10.1594/PANGAEA.75890
  30. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/2_MSN658. https://doi.org/10.1594/PANGAEA.75870
  31. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN661. https://doi.org/10.1594/PANGAEA.75635
  32. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN662. https://doi.org/10.1594/PANGAEA.75636
  33. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN663. https://doi.org/10.1594/PANGAEA.75637
  34. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN671. https://doi.org/10.1594/PANGAEA.75638
  35. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN674. https://doi.org/10.1594/PANGAEA.75639
  36. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN675. https://doi.org/10.1594/PANGAEA.75640
  37. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN676. https://doi.org/10.1594/PANGAEA.75641
  38. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN687. https://doi.org/10.1594/PANGAEA.75642
  39. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/3_MSN688. https://doi.org/10.1594/PANGAEA.75643
  40. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN766. https://doi.org/10.1594/PANGAEA.75747
  41. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN767. https://doi.org/10.1594/PANGAEA.75748
  42. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN768. https://doi.org/10.1594/PANGAEA.75749
  43. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN776. https://doi.org/10.1594/PANGAEA.75750
  44. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN777. https://doi.org/10.1594/PANGAEA.75751
  45. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN778. https://doi.org/10.1594/PANGAEA.75752
  46. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN784. https://doi.org/10.1594/PANGAEA.75753
  47. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN785. https://doi.org/10.1594/PANGAEA.75754
  48. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN786. https://doi.org/10.1594/PANGAEA.75756
  49. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN787. https://doi.org/10.1594/PANGAEA.75757
  50. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN788. https://doi.org/10.1594/PANGAEA.75758
  51. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet M21/6_MSN789. https://doi.org/10.1594/PANGAEA.75759
  52. Schiebel, R; Hemleben, C (2000): Plasm bearing foraminifera counts of multinet POS200/6_MSN837. https://doi.org/10.1594/PANGAEA.75912
  53. Schiebel, R; Hemleben, C (2000): Total foraminifera counts of multinet POS200/6_MSN837. https://doi.org/10.1594/PANGAEA.75911

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