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Schiebel, Ralf; Zeltner, A; Treppke, Ute F; Waniek, Joanna J; Bollmann, Jörg; Rixen, Tim; Hemleben, Christoph (2004): Distribution of diatoms, coccolithophores and planktic foraminifera in the Arabian Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.736805, Supplement to: Schiebel, R et al. (2004): Distribution of diatoms, coccolithophores and planktic foraminifers along a trophic gradient during SW monsoon in the Arabian Sea. Marine Micropaleontology, 51(3-4), 345-371, https://doi.org/10.1016/j.marmicro.2004.02.001

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Abstract:
The distribution of diatoms, coccolithophores and planktic foraminifers mirrored the hydrographic and trophic conditions of the surface ocean (0-100 m) across the upwelling area off the Oman coast to the central Arabian Sea during May/June 1997 and July/August 1995. The number of diatoms was increased in waters with local temperature minimum and enhanced nutrient concentration (nitrate, phosphate, silicate) caused by upwelling. Vegetative cells of Chaetoceros dominated the diatom assemblage in the coastal upwelling area. Towards the more nutrient depleted and stratified surface waters to the southeast, the number of diatoms decreased, coccolithophore and planktic foraminiferal numbers increased, and floral and faunal composition changed. In particular, the transition between the eutrophic upwelling region off Oman and the oligotrophic central Arabian Sea was marked by moderate nutrient concentration, and high coccolithophore and foraminifer numbers. Florisphaera profunda, previously often referred as a 'lower-photic-zone-species', was frequent in water depths as shallow as 20 m, and at high nutrient concentration up to 14 µmol NO3/l and 1.2 µmol PO4/. To the oligotrophic southeast of the divergence, cell densities of coccolithophores declined and Umbellosphaera irregularis prevailed throughout the water column down to 100 m depth. In general, total coccolithophore numbers were limited by nutrient threshold concentration, with low numbers (<10*10**3 cells/l) at high [NO3] and [PO4], and high numbers (>70*10**3 cells/l) at low [NO3] and [PO4]. The components of the complex microplankton succession, diatoms, coccoliths and planktic foraminifers (and possibly others), should ideally be used as a combined paleoceanographic proxy. Consequently, models on plankton ecology should be resolved at least for the seasonality, to account for the bias of paleoceanographic transfer calculations.
Project(s):
Paleoceanography at Tübingen University (GeoTü)
Coverage:
Median Latitude: 16.715534 * Median Longitude: 60.810235 * South-bound Latitude: 9.980000 * West-bound Longitude: 57.341917 * North-bound Latitude: 20.565233 * East-bound Longitude: 65.825650
Date/Time Start: 1995-07-24T11:29:00 * Date/Time End: 1997-06-03T03:18:00
Event(s):
M32/5_MSN971 (404) * Latitude: 9.980000 * Longitude: 65.018333 * Date/Time: 1995-07-24T11:29:00 * Elevation: -4418.0 m * Location: Indian Ocean * Campaign: M32/5 * Basis: Meteor (1986) * Device: Multiple opening/closing net (MSN)
M32/5_MSN974 (414) * Latitude: 14.446667 * Longitude: 65.015000 * Date/Time: 1995-07-27T11:51:00 * Elevation: -3937.0 m * Location: Indian Ocean * Campaign: M32/5 * Basis: Meteor (1986) * Device: Multiple opening/closing net (MSN)
M32/5_MSN977 (423) * Latitude: 16.030883 * Longitude: 62.013117 * Date/Time: 1995-07-30T11:22:00 * Elevation: -3934.0 m * Location: Arabian Sea * Campaign: M32/5 * Basis: Meteor (1986) * Device: Multiple opening/closing net (MSN)
Size:
20 datasets

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Datasets listed in this publication series

  1. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN971. https://doi.org/10.1594/PANGAEA.128637
  2. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN974. https://doi.org/10.1594/PANGAEA.128638
  3. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN977. https://doi.org/10.1594/PANGAEA.128639
  4. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN979. https://doi.org/10.1594/PANGAEA.128640
  5. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN981. https://doi.org/10.1594/PANGAEA.128641
  6. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN982. https://doi.org/10.1594/PANGAEA.128642
  7. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN986. https://doi.org/10.1594/PANGAEA.128643
  8. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN988. https://doi.org/10.1594/PANGAEA.128644
  9. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet M32/5_MSN990. https://doi.org/10.1594/PANGAEA.128645
  10. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1272. https://doi.org/10.1594/PANGAEA.128652
  11. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1278. https://doi.org/10.1594/PANGAEA.128653
  12. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1281. https://doi.org/10.1594/PANGAEA.128654
  13. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1284. https://doi.org/10.1594/PANGAEA.128655
  14. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1288. https://doi.org/10.1594/PANGAEA.128656
  15. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1295. https://doi.org/10.1594/PANGAEA.128657
  16. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1298. https://doi.org/10.1594/PANGAEA.128658
  17. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1301. https://doi.org/10.1594/PANGAEA.128659
  18. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Coccolith counts of multinet SO119_MSN1303. https://doi.org/10.1594/PANGAEA.128660
  19. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Diatom counts in surface water. https://doi.org/10.1594/PANGAEA.128661
  20. Schiebel, R; Zeltner, A; Treppke, UF et al. (2004): Total foraminifera counts from multinet M32/5_MSN979. https://doi.org/10.1594/PANGAEA.127208