Stepanova, Anna Yu (2010): Ostracoda in five sediment cores from the Laptev and Kara seas. PANGAEA, https://doi.org/10.1594/PANGAEA.735539, Supplement to: Stepanova, Anna Yu; Taldenkova, Ekaterina; Bauch, Henning A (2012): Ostracod palaeoecology and environmental change in the Laptev and Kara seas (Siberian Arctic) during the last 18 000 years. Boreas, 41(4), 557-577, https://doi.org/10.1111/j.1502-3885.2012.00254.x
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Fossil ostracods were investigated in five AMS14C-dated cores from different parts of the Laptev and Kara seas. Three cores from the Laptev Sea shelf are located in river paleovalleys, and one core originates from the western continental slope. The core from the Kara Sea was obtained in the eastern shelf region. Six fossil assemblages were distinguished: estuarine (1), inner-shelf (2), middle-shelf (3), outer-shelf (4), Pre-Holocene upper continental slope (5), and Holocene upper continental slope (6). They show that during the Postglacial sea-level rise there was a transition from estuarine brackish-water environment to modern marine conditions. Assemblages 1-3 are present in the eastern Laptev Sea with the oldest ostracod-bearing samples aging back to 11.4-11.3 cal.ka. Cores from the western Laptev Sea (12.3 cal.ka, assemblages 1-4) and the Kara Sea (8.1 cal.ka, assemblages 2-4) demonstrate similar pattern in assemblage replacement, but contain a number of relatively deep-water species reflecting stronger influence of open-sea waters.
Core from the continental slope, water depth 270 m (~ 17 cal.ka) encompasses assemblages 5 and 6, which are absent in the shelf cores. Assemblage 5 stands out as a specific community dominated by relatively deep-water Arctic and North Atlantic species together with euryhaline ones. The assemblages indicate inflows of Atlantic-derived waters and downslope slides due to the proximity to the paleocoastline. Assemblage (6) is similar to the modern local ostracod assemblage at this site.
Median Latitude: 75.973053 * Median Longitude: 116.205187 * South-bound Latitude: 74.657600 * West-bound Longitude: 81.141100 * North-bound Latitude: 77.276000 * East-bound Longitude: 133.243333
Date/Time Start: 1998-08-11T12:33:00 * Date/Time End: 2000-09-07T06:22:00
BP00-07/05 * Latitude: 74.657600 * Longitude: 81.141100 * Date/Time: 2000-09-07T06:22:00 * Elevation: -38.0 m * Recovery: 6.32 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Gravity corer (GC) * Comment: gravity corer 8 m
PS51/135-4 * Latitude: 76.165000 * Longitude: 133.243333 * Date/Time Start: 1998-08-11T12:33:00 * Date/Time End: 1998-08-11T12:42:00 * Elevation: -51.0 m * Penetration: 6.1 m * Recovery: 5.08 m * Location: Laptev Sea * Campaign: ARK-XIV/1b (PS51 Transdrift-V) * Basis: Polarstern * Method/Device: Kasten corer (KAL)
PS51/138-12 * Latitude: 75.000000 * Longitude: 130.000000 * Date/Time Start: 1998-08-13T15:12:00 * Date/Time End: 1998-08-13T15:17:00 * Elevation: -45.0 m * Penetration: 6 m * Recovery: 5.33 m * Location: Laptev Sea * Campaign: ARK-XIV/1b (PS51 Transdrift-V) * Basis: Polarstern * Method/Device: Gravity corer (Kiel type) (SL)
Datasets listed in this publication series
- Stepanova, AY (2010): Ostracoda in sediment core BP00-07/05. https://doi.org/10.1594/PANGAEA.735534
- Stepanova, AY (2010): Ostracoda in sediment core PS51/135-4. https://doi.org/10.1594/PANGAEA.735535
- Stepanova, AY (2010): Ostracoda in sediment core PS51/138-12. https://doi.org/10.1594/PANGAEA.735536
- Stepanova, AY (2010): Ostracoda in sediment core PS51/154-11. https://doi.org/10.1594/PANGAEA.735537
- Stepanova, AY (2010): Ostracoda in sediment core PS51/159-10. https://doi.org/10.1594/PANGAEA.735538