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Licari, Laetitia; Schumacher, Stefanie; Wenzhöfer, Frank; Zabel, Matthias; Mackensen, Andreas (2003): Communities and microhabitats of living benthic foraminifera from the tropical East Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.728238, Supplement to: Licari, L et al. (2003): Communities and microhabitats of living benthic foraminifera from the tropical East Atlantic: impact of different productivity regimes. Journal of Foraminiferal Research, 33(1), 10-31, https://doi.org/10.2113/0330010

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Abstract:
Living (Rose Bengal stained) benthic foraminifera were collected with a multicorer from six stations between 2°N and 12°S off West Africa. The foraminiferal communities in the investigated area reflect the direct influence of different productivity regimes, and are characterized by spatially and seasonally varying upwelling activity. At five stations, foraminiferal abundance coincides well with the gradient of surface productivity. However, at one station off the Congo River, the influence of strong fresh water discharge is documented. Although this station lies directly in the center of an upwelling area, foraminiferal standing stocks are surprisingly low. It is suggested that the Congo discharge may induce a fractionation of the organic matter into small and light particles of low nutritional content, by contrast to the relatively fast-sinking aggregates found in the centers of high productivity areas.
Quality and quantity of the organic matter seem to influence the distribution of microhabitats as well. The flux of organic carbon to the sea-floor controls the sequence of degradation of organic matter in sediment and the position of different redox fronts. The vertical foraminiferal stratification within sediment closely parallels the distribution of oxygen and nitrate in porewater, and reflects different nutritive strategies and adaptation to different types of organic matter. The epifauna and shallow infauna colonize oxygenated sediments where labile organic matter is available. The intermediate infauna (M. barleeanum) is linked to the zone of nitrate reduction in sediments where epifaunal and shallow infaunal species are not competitive anymore, and must feed on bacterial biomass or on metabolizable nutritious particles produced by bacterial degradation of more refractory organic matter. The deep infauna shows its maximum distribution in anoxic sediments, where no easily metabolizable organic matter is available.
Project(s):
South Atlantic in Late Quaternary: Reconstruction of Budget and Currents (SFB261)
Coverage:
Median Latitude: -2.679705 * Median Longitude: 9.305128 * South-bound Latitude: -11.903333 * West-bound Longitude: 6.720000 * North-bound Latitude: 2.678333 * East-bound Longitude: 13.073333
Date/Time Start: 1998-02-26T01:05:00 * Date/Time End: 1998-03-10T14:12:00
Event(s):
GeoB4901-6 * Latitude: 2.678333 * Longitude: 6.720000 * Date/Time: 1998-02-26T01:05:00 * Elevation: -2188.0 m * Recovery: 0.36 m * Location: Eastern Niger fan * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 8 big + 4 small tubes
GeoB4904-7 * Latitude: 0.960000 * Longitude: 8.880000 * Date/Time: 1998-02-28T16:52:00 * Elevation: -1341.0 m * Recovery: 0.52 m * Location: off northern Gabun * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 8 big and 4 small tubes
GeoB4906-5 * Latitude: -0.690000 * Longitude: 8.376667 * Date/Time: 1998-03-02T06:34:00 * Elevation: -1277.0 m * Recovery: 0.35 m * Location: off Gabun * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 8 big and 4 small tubes
Size:
13 datasets

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Datasets listed in this publication series

  1. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Assemblage of living benthic foraminifera in sediment profile GeoB4901-6. https://doi.org/10.1594/PANGAEA.66501
  2. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Assemblage of living benthic foraminifera in sediment profile GeoB4906-5. https://doi.org/10.1594/PANGAEA.66502
  3. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Assemblage of living benthic foraminifera in sediment profile GeoB4909-4. https://doi.org/10.1594/PANGAEA.66504
  4. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Assemblage of living benthic foraminifera in sediment profile GeoB4913-4. https://doi.org/10.1594/PANGAEA.66505
  5. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Characteristics of living benthic foraminifera assemblage in surface sediments (Table 2). https://doi.org/10.1594/PANGAEA.536349
  6. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4901-6 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536310
  7. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4904-7 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536311
  8. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4906-5 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536312
  9. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4909-4 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536313
  10. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4913-4 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536314
  11. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Dissolved oxygen, and nitrate concentrations in porewater of sediment core GeoB4917-5 (Table A1 and A2). https://doi.org/10.1594/PANGAEA.536315
  12. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Organic carbon content in surface sediments, oxygen content of bottom water, and oxygen penetration depth (Table 1). https://doi.org/10.1594/PANGAEA.536308
  13. Licari, L; Schumacher, S; Wenzhöfer, F et al. (2003): Relative abundances of benthic foraminifera in surface sediments (Table A3). https://doi.org/10.1594/PANGAEA.536351