The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species

International audience Diatom assemblages from 228 core-top samples were investigated to determine the modern geographic distributions of 10 major open ocean species or species groups in the Atlantic and Indian sectors of the Southern Ocean. Our study gives a more comprehensive view of the relations...

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Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Crosta, Xavier, Romero, Oscar, Armand, Leanne, Pichon, Jean-Jacques
Other Authors: Environnements et Paléoenvironnements OCéaniques (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), Universität Bremen, University of Tasmania Hobart, Australia (UTAS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2005
Subjects:
Online Access:https://hal.science/hal-02105695
https://doi.org/10.1016/j.palaeo.2005.03.028
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spelling ftinsu:oai:HAL:hal-02105695v1 2023-08-27T04:06:03+02:00 The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species Crosta, Xavier Romero, Oscar Armand, Leanne Pichon, Jean-Jacques Environnements et Paléoenvironnements OCéaniques (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) Universität Bremen University of Tasmania Hobart, Australia (UTAS) 2005 https://hal.science/hal-02105695 https://doi.org/10.1016/j.palaeo.2005.03.028 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2005.03.028 hal-02105695 https://hal.science/hal-02105695 doi:10.1016/j.palaeo.2005.03.028 ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://hal.science/hal-02105695 Palaeogeography, Palaeoclimatology, Palaeoecology, 2005, 223 (1-2), pp.66-92. ⟨10.1016/j.palaeo.2005.03.028⟩ Diatom Bacillariophyceae Biogeography POOZ Southern Ocean Sediments [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2005 ftinsu https://doi.org/10.1016/j.palaeo.2005.03.028 2023-08-02T16:24:29Z International audience Diatom assemblages from 228 core-top samples were investigated to determine the modern geographic distributions of 10 major open ocean species or species groups in the Atlantic and Indian sectors of the Southern Ocean. Our study gives a more comprehensive view of the relationships between diatom distribution and environmental pressures than previous studies, as our modern database covers a much wider area, and additionally highlights the relationships with sea ice cover and concentration. The 10 species or species categories can mainly be lumped into three groupings. First, a cool open ocean grouping composed of Rhizosolenia pointed group, Thalassiosira gracilis group and Trichotoxon reinboldii with maximum relative abundances occurring within the maximum winter sea-ice edge. Second, a pelagic open ocean grouping composed of Fragilariopsis kerguelensis, Thalassiosira lentiginosa, Thalassiosira oliverana and Thalassiothrix spp. group with maximum occurrences at the Antarctic Polar Front. Third, a warm open ocean grouping with maximum abundances observed within the Polar Front Zone and composed of the Rhizosolenia rounded group, the Thalassionema nitzschioides var. nitzschioides group and the Thalassionema nitzschioides var. lanceolata. Comparisons of the abovementioned 10 species or species groups with modern February sea-surface temperatures and sea-ice duration and concentration reveal species-specific sedimentary distributions regulated both by sea-surface temperatures and sea ice conditions that support the use of diatom remains to reconstruct past variations of these environmental parameters via qualitative and transfer function approaches. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Antarctic Indian Southern Ocean The Antarctic Palaeogeography, Palaeoclimatology, Palaeoecology 223 1-2 66 92
institution Open Polar
collection Institut national des sciences de l'Univers: HAL-INSU
op_collection_id ftinsu
language English
topic Diatom
Bacillariophyceae
Biogeography
POOZ
Southern Ocean
Sediments
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
spellingShingle Diatom
Bacillariophyceae
Biogeography
POOZ
Southern Ocean
Sediments
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
Crosta, Xavier
Romero, Oscar
Armand, Leanne
Pichon, Jean-Jacques
The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
topic_facet Diatom
Bacillariophyceae
Biogeography
POOZ
Southern Ocean
Sediments
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
description International audience Diatom assemblages from 228 core-top samples were investigated to determine the modern geographic distributions of 10 major open ocean species or species groups in the Atlantic and Indian sectors of the Southern Ocean. Our study gives a more comprehensive view of the relationships between diatom distribution and environmental pressures than previous studies, as our modern database covers a much wider area, and additionally highlights the relationships with sea ice cover and concentration. The 10 species or species categories can mainly be lumped into three groupings. First, a cool open ocean grouping composed of Rhizosolenia pointed group, Thalassiosira gracilis group and Trichotoxon reinboldii with maximum relative abundances occurring within the maximum winter sea-ice edge. Second, a pelagic open ocean grouping composed of Fragilariopsis kerguelensis, Thalassiosira lentiginosa, Thalassiosira oliverana and Thalassiothrix spp. group with maximum occurrences at the Antarctic Polar Front. Third, a warm open ocean grouping with maximum abundances observed within the Polar Front Zone and composed of the Rhizosolenia rounded group, the Thalassionema nitzschioides var. nitzschioides group and the Thalassionema nitzschioides var. lanceolata. Comparisons of the abovementioned 10 species or species groups with modern February sea-surface temperatures and sea-ice duration and concentration reveal species-specific sedimentary distributions regulated both by sea-surface temperatures and sea ice conditions that support the use of diatom remains to reconstruct past variations of these environmental parameters via qualitative and transfer function approaches.
author2 Environnements et Paléoenvironnements OCéaniques (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)
Universität Bremen
University of Tasmania Hobart, Australia (UTAS)
format Article in Journal/Newspaper
author Crosta, Xavier
Romero, Oscar
Armand, Leanne
Pichon, Jean-Jacques
author_facet Crosta, Xavier
Romero, Oscar
Armand, Leanne
Pichon, Jean-Jacques
author_sort Crosta, Xavier
title The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
title_short The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
title_full The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
title_fullStr The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
title_full_unstemmed The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species
title_sort biogeography of major diatom taxa in southern ocean sediments: 2. open ocean related species
publisher HAL CCSD
publishDate 2005
url https://hal.science/hal-02105695
https://doi.org/10.1016/j.palaeo.2005.03.028
geographic Antarctic
Indian
Southern Ocean
The Antarctic
geographic_facet Antarctic
Indian
Southern Ocean
The Antarctic
genre Antarc*
Antarctic
Sea ice
Southern Ocean
genre_facet Antarc*
Antarctic
Sea ice
Southern Ocean
op_source ISSN: 0031-0182
EISSN: 1872-616X
Palaeogeography, Palaeoclimatology, Palaeoecology
https://hal.science/hal-02105695
Palaeogeography, Palaeoclimatology, Palaeoecology, 2005, 223 (1-2), pp.66-92. ⟨10.1016/j.palaeo.2005.03.028⟩
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hal-02105695
https://hal.science/hal-02105695
doi:10.1016/j.palaeo.2005.03.028
op_doi https://doi.org/10.1016/j.palaeo.2005.03.028
container_title Palaeogeography, Palaeoclimatology, Palaeoecology
container_volume 223
container_issue 1-2
container_start_page 66
op_container_end_page 92
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