Ostracode fauna of sediment core GIK23414-9 in the northeast Atlantic, supplement to: Didié, Claudia; Bauch, Henning A (2000): Species composition and glacial-interglacial variations in the ostracode fauna of the northeast Atlantic during the past 200,000 years. Marine Micropaleontology, 40(1-2), 105-129

Sediment core M23414 from the Rockall Plateau (North Atlantic) covering the last two climatic cycles, marine isotope stages (MIS) 7 to 1, was investigated for glacial-interglacial variations in the deep-sea benthic ostracode fauna. A highly diversified ostracode fauna including 98 species was found....

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Bibliographic Details
Main Authors: Didié, Claudia, Bauch, Henning A
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2000
Subjects:
Kasten corer
M17/2
Meteor 1986
Helmholtz Centre for Ocean Research Kiel GEOMAR
Arctic
Arctic Ocean
Rockall Plateau
North Atlantic
Northeast Atlantic
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.714866
https://doi.pangaea.de/10.1594/PANGAEA.714866
Description
Summary:Sediment core M23414 from the Rockall Plateau (North Atlantic) covering the last two climatic cycles, marine isotope stages (MIS) 7 to 1, was investigated for glacial-interglacial variations in the deep-sea benthic ostracode fauna. A highly diversified ostracode fauna including 98 species was found. Two climate-related assemblages were identified, associated with interglacial and peak glacial periods, respectively. The 'interglacial' group occurs during the end of MIS 7, 5 and 1 and is composed of the genera Henryhowella, Pelecocythere, Echinocythereis, Cytherella, Bradleya, Aversovalva and Eucytherura. The 'glacial' group consists of the genera Acetabulastoma (which is known as 'sea ice indicator' in the modern Arctic Ocean), Polycope, Bythoceratina, ?Rhombobythere, and some species possibly belonging to the genus Pseudocythere and is found during MIS 6, 4 and 2. These longer-term variations within the ostracode fauna seem related to the particular glacial and interglacial climate conditions that affected both deep-water production as well as primary production in the surface waters. However, a detailed comparison of ostracode abundances with the occurrence of events marked by increased ice-rafted debris reveals also much shorter-term climate related changes in the ostracode fauna. Thus, the temporal fluctuations within ostracode assemblages reflect long- and short-term alterations of the deep-sea environment that are clearly linked to climate changes.

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