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Schmiedl, Gerhard; Mitschele, A; Beck, S; Weldeab, Syee; Schulz, Hartmut; Hemleben, Christoph; Sperling, Michael R; Emeis, Kay-Christian (2003): Benthic foraminifera in sapropels of the eastern Mediterranean Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.736661, Supplement to: Schmiedl, G et al. (2003): Benthic foraminiferal record of ecosystem variability in the eastern Mediterranean Sea during times of sapropel S5 and S6 formation. Palaeogeography, Palaeoclimatology, Palaeoecology, 190, 139-164, https://doi.org/10.1016/S0031-0182(02)00603-X

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Abstract:
High-resolution benthic foraminiferal and geochemical investigations were carried out across sapropels S5 and S6 from two sediment cores in the Levantine Sea to evaluate the impact of climatic and environmental changes on benthic ecosystems during times of sapropel formation. The faunal successions indicate that eutrophication and/or oxygen reduction started several thousand years prior to the onset of sapropel formation, suggesting an early response of the bathyal ecosystems to climatic changes. Severest oxygen depletions appear in the early phases of sapropel formation. The initial reduction of deep-water ventilation is caused by a warming and fresh water-induced stratification of Eastern Mediterranean surface waters. During the late phase of S5 formation improved oxygenation is restricted to middle bathyal ecosystems, indicating that at least some formation of subsurface water took place. During S6 formation oxygen depletions and eutrophication were less severe and more variable than during S5 formation. Estimated oxygen contents were low dysoxic at middle bathyal to anoxic at lower bathyal depths during the early phase of S6 formation but never dropped to anoxic values in its late phase. The high benthic ecosystem variability during S6 formation suggests that water column stratification at deep-water formation sites was in a very unstable mode and susceptible to minor temperature fluctuations at a millennial time-scale.
Project(s):
Paleoceanography at Tübingen University (GeoTü)
Coverage:
Median Latitude: 33.709967 * Median Longitude: 30.715375 * South-bound Latitude: 32.608700 * West-bound Longitude: 27.287700 * North-bound Latitude: 34.814167 * East-bound Longitude: 34.138900
Date/Time Start: 1998-01-23T00:00:00 * Date/Time End: 1999-04-18T00:00:00
Event(s):
M40/4_KL51 (67) * Latitude: 34.808300 * Longitude: 27.287700 * Date/Time: 1998-01-23T00:00:00 * Elevation: -2157.0 m * Recovery: 7 m * Location: E of Crete * Campaign: M40/4 * Basis: Meteor (1986) * Device: Piston corer Meischner large (KL_Mg)
M40/4_SL67 * Latitude: 34.814167 * Longitude: 27.296000 * Date/Time: 1998-01-23T02:49:00 * Elevation: -2157.0 m * Campaign: M40/4 * Basis: Meteor (1986) * Device: Gravity corer (Kiel type) (SL)
M44/3_KL83 (M44_1 GeoTü KL-83) * Latitude: 32.608700 * Longitude: 34.138900 * Date/Time: 1999-04-18T00:00:00 * Elevation: -1433.0 m * Recovery: 9.8 m * Campaign: M44/3 * Basis: Meteor (1986) * Device: Piston corer Meischner large (KL_Mg)
Size:
16 datasets

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Datasets listed in this publication series

  1. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction 63-125µm across sapropel S5 in core M40/4_67SL from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115686
  2. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction 63-125µm across sapropel S5 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115690
  3. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction 63-125µm across sapropel S6 in core M40/4_KL51 from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115688
  4. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction 63-125µm across sapropel S6 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115692
  5. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction >125µm across sapropel S5 in core M40/4_67SL from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115685
  6. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction >125µm across sapropel S5 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115689
  7. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction >125µm across sapropel S6 in core M40/4_KL51 from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115687
  8. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Benthic foraminiferal number, diversity, and species abundance of size fraction >125µm across sapropel S6 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115691
  9. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Sediment lightness across sapropel S5 in core M40/4_SL67 from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115081
  10. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Sediment lightness across sapropel S5 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115079
  11. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Sediment lightness across sapropel S6 in core M40/4_KL51 from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115072
  12. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Sediment lightness across sapropel S6 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115080
  13. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Stable oxygen isotope signal of Globigerinoides ruber across sapropel S5 in core M40/4_67SL from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115078
  14. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Stable oxygen isotope signal of Globigerinoides ruber across sapropel S5 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115076
  15. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Stable oxygen isotope signal of Globigerinoides ruber across sapropel S6 in core M40/4_KL51 from the lower bathyal of the western Levantine Basin. https://doi.org/10.1594/PANGAEA.115071
  16. Schmiedl, G; Mitschele, A; Beck, S et al. (2003): Stable oxygen isotope signal of Globigerinoides ruber across sapropel S6 in core M44/3_KL83 from the middle bathyal of the eastern Levantine Basin. https://doi.org/10.1594/PANGAEA.115077