Matul, Alexander G (1998): Radiolaria in the surface layer of bottom sediments from the northern sector of the Benguela upwelling [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.760331, Supplement to: Matul, AG (1998): On the Radiolaria from the surface layer of the bottom sediments of the northern sector of the Benguela upwelling. Translated from Okeanologiya, 1998, 38(5), 759-765, Oceanology, 38(5), 687-692
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Abstract:
Quantitative data on radiolarian assemblages from the Benguela upwelling at 17-25°S were obtained from analysis of 18 bottom sediment samples. The maximum abundance of Radiolaria (20000-40000 individuals per 1 g of sediment) was determined in sediments of the open ocean at depth 2000-4100 m. Species of tropical zones dominate in the assemblages; however content of species of subpolar and moderate zones reaches considerable values. In shelf sediments at depth 60-160 m abundance of Radiolaria (up to 5000 ind./g) is greater than in sediments of the continental slope. In shelf assemblages species of subpolar and temperate zones dominate. A characteristic feature of the shelf upwelling assemblages of Radiolaria is expressed by predominance of Lithomelissa setosa (Joerg.) (up to 50-80% at 23-25°S). L. setosa is a common representative of radiolarian assemblages of subpolar and temperate regions of the World Ocean. It is presumably regarded as an eurybiont species. Probably, it propagates with subantarctic intermediate water masses from the circumantarctic area to the Benguela upwelling region where there are favorable living conditions: subsurface water temperature is not higher than 10°C and there are high concentrations of nutrients.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: -20.976787 * Median Longitude: 12.082693 * South-bound Latitude: -25.133333 * West-bound Longitude: 9.576667 * North-bound Latitude: -16.825000 * East-bound Longitude: 14.706667
Event(s):
Vy20-3206 * Latitude: -16.825000 * Longitude: 9.766667 * Elevation: -4100.0 m * Location: Benguela Upwelling * Method/Device: Gravity corer (GC)
Vy20-3209 * Latitude: -16.845000 * Longitude: 9.576667 * Elevation: -4145.0 m * Location: Benguela Upwelling * Method/Device: Box corer (BC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Matul, AG (1998): (Table 1) Abundance of radiolarians in the surface layer of bottom sediments from the Benguela upwelling area. https://doi.org/10.1594/PANGAEA.760329
- Matul, AG (1998): (Table 2) Relative abundance of Radiolaria species in the surface layer of bottom sediments from the Benguela upwelling area. https://doi.org/10.1594/PANGAEA.760330