Pleistocene to Holocene benthic foraminiferal assemblages from the Peruvian continental margin.

Erdem, Zeynep and Schönfeld, Joachim (2017) Pleistocene to Holocene benthic foraminiferal assemblages from the Peruvian continental margin. Open Access Palaeontologia Electronica, 20 (2). Art.Nr. 35A. DOI 10.26879/764.

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The benthic foraminiferal inventory and their assemblage composition was documented
along five sediment cores from the Peruvian margin between 3°S and 18°S at
water depths of 500 to 1250 m, covering the lower boundary of today’s Oxygen Minimum
Zone (OMZ). Emphasis was given to certain time intervals during the last 22
thousand years when different climatic and oceanographic conditions prevailed than
today. In total three agglutinated and 186 calcareous species were recognised. Bolivina
costata, Bolivinita minuta, Cassidulina delicata and Epistominella exigua were most
abundant. The foraminiferal distributions revealed a marked change in assemblage
composition particularly at the deeper cores during and after the deglaciation. The
diversity declined and Bolivina species became dominant. These changes took place
gradually over several millennia, and high-frequency fluctuations were not recorded.
This pattern provides evidence for rather stable ecological conditions and sluggish
changes in bottom water circulation during the last deglaciation.

Document Type: Article
Additional Information: WOS:000416504000006
Keywords: benthic foraminifera; taxonomy; Peru; Oxygen Minimum Zone; Holocene; Deglaciation
Research affiliation: OceanRep > SFB 754 > B7
OceanRep > SFB 754
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: Yes
Publisher: Palaeontological Association
Projects: SFB754
Date Deposited: 02 Aug 2017 12:24
Last Modified: 23 Nov 2020 11:52

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