Freshwater ostracodes in Quaternary permafrost deposits in the Siberian Arctic.

Wetterich, Sebastian, Schirrmeister, Lutz and Pietrzeniuk, Erika (2005) Freshwater ostracodes in Quaternary permafrost deposits in the Siberian Arctic. Journal of Paleolimnology, 34 (3). pp. 363-376. DOI 10.1007/s10933-005-5801-y.

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Abstract

Ostracode analysis was carried out on samples from ice-rich permafrost deposits obtained on the Bykovsky Peninsula (Laptev Sea). A composite profile was investigated that covers most of a 38-m thick permafrost sequence and corresponds to the last ca. 60 kyr of the Late Quaternary. The ostracode assemblages are similar to those known from European Quaternary lake deposits during cold stages. The ostracode habitats were small, shallow, cold, oligotrophic pools located in low centred ice wedge polygons or in small thermokarst depressions. In total, 15 taxa, representing 7 genera, were identified from 65 samples. The studied section is subdivided into six ostracode zones that correspond to Late Quaternary climatic and environmental stadial-interstadial variations established by other paleoenvironmental proxies: (1) cold and dry Zyrianian stadial (58–53 kyr BP); (2) warm and dry Karginian interstadial (48–34 kyr BP); (3) transition from the Karginian interstadial to the cold and dry Sartanian stadial (34–21 kyr BP); (4) transition from the Sartanian stadial to the warm and dry Late Pleistocene period, the Allerød (21–14 kyr BP); (5) transition from the Allerød to the warm and wet Middle Holocene (14–7 kyr BP); and (6) cool and wet Late Holocene (ca. 3 kyr BP). The abundance and diversity of the ostracodes will be used as an additional bioindicator for paleoenvironmental reconstructions of the Siberian Arctic.

Document Type: Article
Keywords: Climate change; Physical geography; Sedimentology; Hydrobiology; Environment, general; Freshwater ostracodes; Late Quaternary; Paleoenvironments; Permafrost; Siberian Arctic
Research affiliation: AWI
Refereed: Yes
DOI etc.: 10.1007/s10933-005-5801-y
ISSN: 0921-2728
Projects: Laptev Sea System, Permafrost
Date Deposited: 02 Apr 2015 08:11
Last Modified: 02 Apr 2015 08:11
URI: http://oceanrep.geomar.de/id/eprint/28411

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