Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic
Reconstructions of paleo-environments are frequently based on stable isotope measurements. General assumptions are that a foraminifer has a stable life habitat throughout ontogeny and that the d13C of the TCO2 is constant in the mixed layer. However, because most planktic foraminifera, if not all, c...
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ftawi:oai:epic.awi.de:1274 2023-09-05T13:21:32+02:00 Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic Hemleben, C. Bijma, Jelle 1994 application/pdf https://epic.awi.de/id/eprint/1274/ https://epic.awi.de/id/eprint/1274/1/Hem1994a.pdf https://hdl.handle.net/10013/epic.11864 https://hdl.handle.net/10013/epic.11864.d001 unknown https://epic.awi.de/id/eprint/1274/1/Hem1994a.pdf https://hdl.handle.net/10013/epic.11864.d001 Hemleben, C. and Bijma, J. orcid:0000-0003-4371-1438 (1994) Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic , Carbon cycling in the glacial ocean Constraints on the ocean's role in global change (R Zahn, M Kaminski, L Labeyrie, T Pedersen, eds ) NATO ASI Series I 17 . hdl:10013/epic.11864 EPIC3Carbon cycling in the glacial ocean Constraints on the ocean's role in global change (R Zahn, M Kaminski, L Labeyrie, T Pedersen, eds ) NATO ASI Series I 17, pp. 145-166 Inbook peerRev 1994 ftawi 2023-08-22T19:42:32Z Reconstructions of paleo-environments are frequently based on stable isotope measurements. General assumptions are that a foraminifer has a stable life habitat throughout ontogeny and that the d13C of the TCO2 is constant in the mixed layer. However, because most planktic foraminifera, if not all, change their life horizon during ontogeny and because the d13C of the TCO2 is not necessarily constant in the mixed layer, the isotopic composition of the foraminiferal shells is not only dependent on water-mass properties (e.g. oligotrophic vs. eutrophic) and the geographic and climatic setting (e.g. upwelling, monsoon etc.) but to an important extent on the life history of the foraminifer. Consequently, the disequilibrium precipitation reported in the literature must be explained in terms of ontogenetic migration and so called vital effects in addition to phytoplankton growth dynamics.Modelling the effect of ontogenetic migration patterns and metabolic effects show a discrepancy with measured isotope data that needs further attention. Without the understanding of the mechanism controlling the carbon isotope signal, paleo-environmental reconstruction on the basis of carbon isotopes is not legitimate. Book Part North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Reconstructions of paleo-environments are frequently based on stable isotope measurements. General assumptions are that a foraminifer has a stable life habitat throughout ontogeny and that the d13C of the TCO2 is constant in the mixed layer. However, because most planktic foraminifera, if not all, change their life horizon during ontogeny and because the d13C of the TCO2 is not necessarily constant in the mixed layer, the isotopic composition of the foraminiferal shells is not only dependent on water-mass properties (e.g. oligotrophic vs. eutrophic) and the geographic and climatic setting (e.g. upwelling, monsoon etc.) but to an important extent on the life history of the foraminifer. Consequently, the disequilibrium precipitation reported in the literature must be explained in terms of ontogenetic migration and so called vital effects in addition to phytoplankton growth dynamics.Modelling the effect of ontogenetic migration patterns and metabolic effects show a discrepancy with measured isotope data that needs further attention. Without the understanding of the mechanism controlling the carbon isotope signal, paleo-environmental reconstruction on the basis of carbon isotopes is not legitimate. |
format |
Book Part |
author |
Hemleben, C. Bijma, Jelle |
spellingShingle |
Hemleben, C. Bijma, Jelle Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
author_facet |
Hemleben, C. Bijma, Jelle |
author_sort |
Hemleben, C. |
title |
Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
title_short |
Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
title_full |
Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
title_fullStr |
Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
title_full_unstemmed |
Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic |
title_sort |
foraminiferal population dynamics, stable isotopes and paleo-environment in the red sea and the north atlantic |
publishDate |
1994 |
url |
https://epic.awi.de/id/eprint/1274/ https://epic.awi.de/id/eprint/1274/1/Hem1994a.pdf https://hdl.handle.net/10013/epic.11864 https://hdl.handle.net/10013/epic.11864.d001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EPIC3Carbon cycling in the glacial ocean Constraints on the ocean's role in global change (R Zahn, M Kaminski, L Labeyrie, T Pedersen, eds ) NATO ASI Series I 17, pp. 145-166 |
op_relation |
https://epic.awi.de/id/eprint/1274/1/Hem1994a.pdf https://hdl.handle.net/10013/epic.11864.d001 Hemleben, C. and Bijma, J. orcid:0000-0003-4371-1438 (1994) Foraminiferal population dynamics, stable isotopes and paleo-environment in the Red Sea and the North Atlantic , Carbon cycling in the glacial ocean Constraints on the ocean's role in global change (R Zahn, M Kaminski, L Labeyrie, T Pedersen, eds ) NATO ASI Series I 17 . hdl:10013/epic.11864 |
_version_ |
1776202134202613760 |