Abyssal ostracods from the South and Equatorial Atlantic Ocean: Biological and paleoceanographic implications

Yasuhara, M.; Cronin, T. M.; Martinez, Arbizu, P.

Abstract:

We report the distribution of ostracods from ???5000 m depth from the Southeast and Equatorial Atlantic Ocean recovered from the uppermost 10 cm of minimally disturbed sediments taken by multiple-corer during the R/V Meteor DIVA2 expedition M63.2. Five cores yielded the following major deep-sea genera: Krithe, Henryhowella, Poseidonamicus, Legitimocythere, Pseudobosquetina, and Pennyella. All genera are widely distributed in abyssal depths in the world‘s oceans and common in Cenozoic deep-sea sediments. The total number of ostracod specimens is higher and ostracod shell preservation is better near the sediment-water interface, especially at the 0-1 cm core depths. Core slices from ???5 to 10 cm were barren or yielded a few poorly preserved specimens. The DIVA2 cores show that deep-sea ostracod species inhabit corrosive bottom water near the carbonate compensation depth (CCD) even though their calcareous valves are rarely preserved as fossils in sediment cores due to postmortem dissolution. Their occurrence at great water depths may partially explain the well-known global distributions of major deep-sea taxa in the world‘s oceans, although further expeditions using minimal-disturbance sampling devices are needed to fill geographic gaps. ?? 2008 Elsevier Ltd. All rights reserved.

Genre:

Article

ProdID:

70032136

Citation Author:

Yasuhara, M.; Cronin, T. M.; Martinez, Arbizu, P.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

497

Citation Issue:

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

Deep-Sea Research Part I: Oceanographic Research Papers

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

Citation Projection:

Citation Public Comments:

Citation Publisher:

Citation Series:

Citation Series Code:

Citation Series Number:

Citation Search Results Text:

Abyssal ostracods from the South and Equatorial Atlantic Ocean: Biological and paleoceanographic implications; 2008; Article; Journal; Deep-Sea Research Part I: Oceanographic Research Papers; Yasuhara, M.; Cronin, T. M.; Martinez, Arbizu, P.