Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay.
International audience Benthic and planktic foraminiferal assemblages from two sediment cores (2,000 m depth, 44 degrees 33'N, 2 degrees 45'W) were analyzed to first compare modern and dead faunas and next to study changes in the hydrology of the southeastern Bay of Biscay (SE BoB) over th...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-01388894 https://doi.org/10.4467/16890027AP.13.0015.1112 |
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ftunivnantes:oai:HAL:hal-01388894v1 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Garcia, Jennifer Mojtahid, Meryem Howa, Hélène Michel, Elisabeth Schiebel, Ralf Charbonnier, Celine Anschutz, Pierre Jorissen, Frans Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Benthic and planktic foraminiferal assemblages from two sediment cores (2,000 m depth, 44 degrees 33'N, 2 degrees 45'W) were analyzed to first compare modern and dead faunas and next to study changes in the hydrology of the southeastern Bay of Biscay (SE BoB) over the last 12.8 cal ka BP. Considering benthic ecosystem characteristics, the first part of the paleorecord (12.8-7.6 cal ka BP) is composed of laminated sediments that may have resulted from turbiditic overflow events, whereas occurrences of transported species (e. g. Nonionella sp., Cassidulina carinata) attest of continental influence at the core location. After 7.6 cal ka BP, the sediment becomes bioturbated concomitantly to the stabilization of the sea-level. The benthic foraminiferal fauna is largely dominated by Uvigerina peregrina suggesting a high seasonality with seasonal pulsed organic matter fluxes to the seafloor. On the other hand, the planktic foraminiferal composition indicates that surface water masses were under the influence of the polar front in the early record, which retreated at about 11.5 cal ka BP. The early Holocene is characterized by relatively warm and stratified water masses at 8.4-4.8 cal ka BP. The last 4.8 cal ka BP records a gradual sea surface water cooling trend and enhanced foraminiferal production from similar to 2.6 cal ka BP until present. The early (12.8-10.5 cal ka BP) and late (2.3-1.7 cal ka BP) Holocene are characterized by the presence of the planktic species Globigerinoides ruber probably caused by intrusions of the Iberian Poleward Current (IPC), and a negative state of the North Atlantic Oscillation (NAO). |
author2 |
Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Garcia, Jennifer Mojtahid, Meryem Howa, Hélène Michel, Elisabeth Schiebel, Ralf Charbonnier, Celine Anschutz, Pierre Jorissen, Frans |
author_facet |
Garcia, Jennifer Mojtahid, Meryem Howa, Hélène Michel, Elisabeth Schiebel, Ralf Charbonnier, Celine Anschutz, Pierre Jorissen, Frans |
author_sort |
Garcia, Jennifer |
title |
Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
title_short |
Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
title_full |
Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
title_fullStr |
Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
title_full_unstemmed |
Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. |
title_sort |
benthic and planktic foraminifera as indicators of late glacial to holocene paleoclimatic changes in a marginal environment: an example from the southeastern bay of biscay. |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-01388894 https://doi.org/10.4467/16890027AP.13.0015.1112 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0065-1583 EISSN: 1689-0027 Acta Protozoologica https://hal.science/hal-01388894 Acta Protozoologica, 2013, 52 (3), pp.161-180. ⟨10.4467/16890027AP.13.0015.1112⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.4467/16890027AP.13.0015.1112 hal-01388894 https://hal.science/hal-01388894 doi:10.4467/16890027AP.13.0015.1112 OKINA: ua3936 |
op_doi |
https://doi.org/10.4467/16890027AP.13.0015.1112 |
_version_ |
1766134648245583872 |
spelling |
ftunivnantes:oai:HAL:hal-01388894v1 2023-05-15T17:35:28+02:00 Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay. Garcia, Jennifer Mojtahid, Meryem Howa, Hélène Michel, Elisabeth Schiebel, Ralf Charbonnier, Celine Anschutz, Pierre Jorissen, Frans Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.science/hal-01388894 https://doi.org/10.4467/16890027AP.13.0015.1112 en eng HAL CCSD Jagiellonian University info:eu-repo/semantics/altIdentifier/doi/10.4467/16890027AP.13.0015.1112 hal-01388894 https://hal.science/hal-01388894 doi:10.4467/16890027AP.13.0015.1112 OKINA: ua3936 ISSN: 0065-1583 EISSN: 1689-0027 Acta Protozoologica https://hal.science/hal-01388894 Acta Protozoologica, 2013, 52 (3), pp.161-180. ⟨10.4467/16890027AP.13.0015.1112⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.4467/16890027AP.13.0015.1112 2023-02-08T09:58:55Z International audience Benthic and planktic foraminiferal assemblages from two sediment cores (2,000 m depth, 44 degrees 33'N, 2 degrees 45'W) were analyzed to first compare modern and dead faunas and next to study changes in the hydrology of the southeastern Bay of Biscay (SE BoB) over the last 12.8 cal ka BP. Considering benthic ecosystem characteristics, the first part of the paleorecord (12.8-7.6 cal ka BP) is composed of laminated sediments that may have resulted from turbiditic overflow events, whereas occurrences of transported species (e. g. Nonionella sp., Cassidulina carinata) attest of continental influence at the core location. After 7.6 cal ka BP, the sediment becomes bioturbated concomitantly to the stabilization of the sea-level. The benthic foraminiferal fauna is largely dominated by Uvigerina peregrina suggesting a high seasonality with seasonal pulsed organic matter fluxes to the seafloor. On the other hand, the planktic foraminiferal composition indicates that surface water masses were under the influence of the polar front in the early record, which retreated at about 11.5 cal ka BP. The early Holocene is characterized by relatively warm and stratified water masses at 8.4-4.8 cal ka BP. The last 4.8 cal ka BP records a gradual sea surface water cooling trend and enhanced foraminiferal production from similar to 2.6 cal ka BP until present. The early (12.8-10.5 cal ka BP) and late (2.3-1.7 cal ka BP) Holocene are characterized by the presence of the planktic species Globigerinoides ruber probably caused by intrusions of the Iberian Poleward Current (IPC), and a negative state of the North Atlantic Oscillation (NAO). Article in Journal/Newspaper North Atlantic North Atlantic oscillation Université de Nantes: HAL-UNIV-NANTES |