Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Schumacher, Stefanie; Jorissen, Frans J; Dissard, Delphine; Larkin, Kate E; Gooday, Andrew J (2007): Analysis of Recent benthic foraminiferal assemblages from the oxygen minimum zone of the Pakistan continental margin. PANGAEA, https://doi.org/10.1594/PANGAEA.475995, Supplement to: Schumacher, S et al. (2007): Live (Rose Bengal stained) and dead benthic foraminifera from the oxygen minimum zone of the Pakistan continental margin (Arabian Sea). Marine Micropaleontology, 62(1), 45-73, https://doi.org/10.1016/j.marmicro.2006.07.004

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Live (Rose Bengal stained) and dead benthic foraminiferal communities (hard-shelled species only) from the Pakistan continental margin oxygen minimum zone (OMZ) have been studied in order to determine the relation between faunal composition and the oxygenation of bottom waters. During R.R.S. Charles Darwin Cruises 145 and 146 (12 March to May 28 2003), 11 multicores were taken on the continental margin off Karachi, Pakistan. Two transects were sampled, constituting a composite bathymetric profile from 136 m (above the OMZ in spring 2003) down to 1870 m water depth. Cores (surface area 25.5 cm2) were processed as follows: for stations situated above, and in the upper part of the OMZ, sediment slices were taken for the 0-0.5 and 0.5-1 cm intervals, and then in 1 cm intervals down to 10 cm. For the lower part of the OMZ, the second centimetre was also sliced in half-centimetre intervals. Each sample was stored in 10 % borax-buffered formalin for further processing. Onshore, the samples were wet sieved over 63 µm, 150 µm and 300 µm sieves and the residues were stained for one week in ethanol with Rose Bengal. After staining, the residue was washed again. The stained faunas were picked wet in three granulometric fractions (63-150 µm, 150-300 µm and >300 µm), down to 10 cm depth. To gain more insight into the population dynamics we investigated the dead (unstained) foraminifera in the 2-3 cm level for the fractions 150-300 µm and >300 µm. The fractions >300 µm and 150-300 µm show nearly the same faunal distribution and therefore the results are presented here for both fractions combined (i.e. the >150 µm fraction). Live foraminiferal densities show a clear maximum in the first half centimetre of the sediment; only few specimens are found down to 4 cm depth. The faunas exhibit a clear zonation across the Pakistan margin OMZ. Down to 500 m water depth, Uvigerina ex gr. U. semiornata and Bolivina aff. B. dilatata dominate the assemblages. These taxa are largely restricted to the upper cm of the sediment. They are adapted to the very low bottom-water oxygen values (ab. 0.1 ml/l in the OMZ core) and the extremely high input of organic carbon on the upper continental slope. The lower part of the OMZ is characterized by cosmopolitan faunas, containing also some taxa that in other areas have been described in deep infaunal microhabitats.
Coverage:
Median Latitude: 23.055133 * Median Longitude: 66.536943 * South-bound Latitude: 22.858880 * West-bound Longitude: 66.000270 * North-bound Latitude: 23.289160 * East-bound Longitude: 66.719720
Date/Time Start: 2003-03-21T00:00:00 * Date/Time End: 2003-05-21T00:00:00
Event(s):
CD145_55802#4 (A1200) * Latitude: 23.010830 * Longitude: 66.412220 * Date/Time: 2003-03-21T00:00:00 * Elevation: -1201.0 m * Recovery: 0.1 m * Location: Arabian Sea * Campaign: CD145 * Basis: Charles Darwin * Method/Device: MultiCorer (MUC)
CD145_55803#5 (A300) * Latitude: 23.214720 * Longitude: 66.567830 * Date/Time: 2003-03-22T00:00:00 * Elevation: -306.0 m * Recovery: 0.1 m * Location: Arabian Sea * Campaign: CD145 * Basis: Charles Darwin * Method/Device: MultiCorer (MUC)
CD145_55808#3 (A150) * Latitude: 23.282500 * Longitude: 66.661380 * Date/Time: 2003-03-23T00:00:00 * Elevation: -150.0 m * Recovery: 0.1 m * Location: Arabian Sea * Campaign: CD145 * Basis: Charles Darwin * Method/Device: MultiCorer (MUC)
Size:
25 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55802#4, 63-150 µm. https://doi.org/10.1594/PANGAEA.397173
  2. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55802#4, >150 µm. https://doi.org/10.1594/PANGAEA.397159
  3. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55803#5, 63-150 µm. https://doi.org/10.1594/PANGAEA.397174
  4. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55803#5, >150 µm. https://doi.org/10.1594/PANGAEA.397160
  5. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55808#3, 63-150 µm. https://doi.org/10.1594/PANGAEA.397175
  6. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55808#3, >150 µm. https://doi.org/10.1594/PANGAEA.397161
  7. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55818#4, 63-150 µm. https://doi.org/10.1594/PANGAEA.397176
  8. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55818#4, >150 µm. https://doi.org/10.1594/PANGAEA.397162
  9. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55830#3, 63-150 µm. https://doi.org/10.1594/PANGAEA.397177
  10. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD145_55830#3, >150 µm. https://doi.org/10.1594/PANGAEA.397163
  11. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55901#11, 63-150 µm. https://doi.org/10.1594/PANGAEA.397178
  12. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55901#11, >150 µm. https://doi.org/10.1594/PANGAEA.397164
  13. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55907#1, 63-150 µm. https://doi.org/10.1594/PANGAEA.397179
  14. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55907#1, >150 µm. https://doi.org/10.1594/PANGAEA.397165
  15. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55916#1, 63-150 µm. https://doi.org/10.1594/PANGAEA.397180
  16. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55916#1, >150 µm. https://doi.org/10.1594/PANGAEA.397166
  17. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55918#7, 63-150 µm. https://doi.org/10.1594/PANGAEA.397181
  18. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55918#7, >150 µm. https://doi.org/10.1594/PANGAEA.397167
  19. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55921#1, 63-150 µm. https://doi.org/10.1594/PANGAEA.397182
  20. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55921#1, >150 µm. https://doi.org/10.1594/PANGAEA.397168
  21. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55922#2, 63-150 µm. https://doi.org/10.1594/PANGAEA.397183
  22. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Assemblage of living benthic foraminifera in sediment core CD146_55922#2, >150 µm. https://doi.org/10.1594/PANGAEA.397169
  23. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Live benthic foraminifera diversity in the 63-150 µm fraction of surface sediments from the Pakistan continental margin. https://doi.org/10.1594/PANGAEA.398205
  24. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Live benthic foraminifera diversity in the >150 µm fraction of surface sediments from the Pakistan continental margin. https://doi.org/10.1594/PANGAEA.398204
  25. Schumacher, S; Jorissen, FJ; Dissard, D et al. (2007): Benthic foraminifera (dead assemblages) in surface sediments from the Pakistan continental margin. https://doi.org/10.1594/PANGAEA.398200