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Reorganization of Southern Ocean Plankton Ecosystem at the Onset of Antarctic Glaciation

Reorganization of Southern Ocean Plankton Ecosystem at the Onset of Antarctic Glaciation
Reorganization of Southern Ocean Plankton Ecosystem at the Onset of Antarctic Glaciation
The circum-Antarctic Southern Ocean is an important region for global marine food webs and carbon cycling because of sea-ice formation and its unique plankton ecosystem. However, the mechanisms underlying the installation of this distinct ecosystem and the geological timing of its development remain unknown. Here, we show, on the basis of fossil marine dinoflagellate cyst records, that a major restructuring of the Southern Ocean plankton ecosystem occurred abruptly and concomitant with the first major Antarctic glaciation in the earliest Oligocene (~33.6 million years ago). This turnover marks a regime shift in zooplankton-phytoplankton interactions and community structure, which indicates the appearance of eutrophic and seasonally productive environments on the Antarctic margin. We conclude that earliest Oligocene cooling, ice-sheet expansion, and subsequent sea-ice formation were important drivers of biotic evolution in the Southern Ocean.
0036-8075
341-344
Houben, A.J.P.
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Bijl, P.K.
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Pross, J.
e6953dba-20e4-4abd-8b01-4e1ac8d1e14a
Bohaty, S.M.
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Passchier, S.
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Stickley, C.E.
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Rohl, U.
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Sugisaki, S.
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Tauxe, L.
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van de Flierdt, T.
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Olney, M.
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Sangiorgi, F.
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Sluijs, A.
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Escutia, C.
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Brinkhuis, H.
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Houben, A.J.P.
7fc1873c-1af2-4291-8a00-f0d7c87d166f
Bijl, P.K.
121c4b68-94b0-4186-a0bb-730167bd26d6
Pross, J.
e6953dba-20e4-4abd-8b01-4e1ac8d1e14a
Bohaty, S.M.
af9dbe78-8b9f-44f2-ba1d-20795837d2d1
Passchier, S.
2c0cb99a-b765-4906-b7a7-a22e6dec61ce
Stickley, C.E.
ad01e13a-f406-439b-a0b9-14efad06c17b
Rohl, U.
3545696d-3b67-4b2b-a3d0-8a781e6af3a2
Sugisaki, S.
c3f1a6c5-a270-4db4-accc-ffd58f948b44
Tauxe, L.
d444c533-38fd-484b-b74b-79a84a8133d8
van de Flierdt, T.
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Olney, M.
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Sangiorgi, F.
07f16d94-bae6-43e7-8b06-6af2c893bc0a
Sluijs, A.
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Escutia, C.
0045bb05-eae3-46d8-9f6a-c8b0d2e0699c
Brinkhuis, H.
c9577a7a-c06c-44af-a641-015aacc50b57

Houben, A.J.P., Bijl, P.K., Pross, J., Bohaty, S.M., Passchier, S., Stickley, C.E., Rohl, U., Sugisaki, S., Tauxe, L., van de Flierdt, T., Olney, M., Sangiorgi, F., Sluijs, A., Escutia, C. and Brinkhuis, H. (2013) Reorganization of Southern Ocean Plankton Ecosystem at the Onset of Antarctic Glaciation. Science, 340 (6130), 341-344. (doi:10.1126/science.1223646).

Record type: Article

Abstract

The circum-Antarctic Southern Ocean is an important region for global marine food webs and carbon cycling because of sea-ice formation and its unique plankton ecosystem. However, the mechanisms underlying the installation of this distinct ecosystem and the geological timing of its development remain unknown. Here, we show, on the basis of fossil marine dinoflagellate cyst records, that a major restructuring of the Southern Ocean plankton ecosystem occurred abruptly and concomitant with the first major Antarctic glaciation in the earliest Oligocene (~33.6 million years ago). This turnover marks a regime shift in zooplankton-phytoplankton interactions and community structure, which indicates the appearance of eutrophic and seasonally productive environments on the Antarctic margin. We conclude that earliest Oligocene cooling, ice-sheet expansion, and subsequent sea-ice formation were important drivers of biotic evolution in the Southern Ocean.

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More information

Published date: 19 April 2013
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 353311
URI: https://eprints.soton.ac.uk/id/eprint/353311
ISSN: 0036-8075
PURE UUID: 7f7c4ade-2c41-436d-a5b6-52dfd738f820
ORCID for S.M. Bohaty: ORCID iD orcid.org/0000-0002-1193-7398

Catalogue record

Date deposited: 04 Jun 2013 15:47
Last modified: 26 Oct 2018 00:32

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Contributors

Author: A.J.P. Houben
Author: P.K. Bijl
Author: J. Pross
Author: S.M. Bohaty ORCID iD
Author: S. Passchier
Author: C.E. Stickley
Author: U. Rohl
Author: S. Sugisaki
Author: L. Tauxe
Author: T. van de Flierdt
Author: M. Olney
Author: F. Sangiorgi
Author: A. Sluijs
Author: C. Escutia
Author: H. Brinkhuis

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