Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls
International audience Coccolithophores are one of the most abundant and widespread groups of calcifying plankton and have attracted extensive study in terms of their likely response to ocean acidification. Conflicting results concerning coccolithophore calcification have been reported from both exp...
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Online Access: | https://hal.science/hal-02409222 https://doi.org/10.1016/j.marmicro.2019.101798 |
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ftunivaixmarseil:oai:HAL:hal-02409222v1 2024-04-28T08:34:57+00:00 Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls Su, Xiang Liu, Chuanlian Beaufort, Luc, L State Key Laboratory of Marine Geology Shanghai Tongji University Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2020-01 https://hal.science/hal-02409222 https://doi.org/10.1016/j.marmicro.2019.101798 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2019.101798 hal-02409222 https://hal.science/hal-02409222 doi:10.1016/j.marmicro.2019.101798 WOS: 000515215200005 ISSN: 0377-8398 Marine Micropaleontology https://hal.science/hal-02409222 Marine Micropaleontology, 2020, 154, ⟨10.1016/j.marmicro.2019.101798⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2020 ftunivaixmarseil https://doi.org/10.1016/j.marmicro.2019.101798 2024-04-04T17:34:58Z International audience Coccolithophores are one of the most abundant and widespread groups of calcifying plankton and have attracted extensive study in terms of their likely response to ocean acidification. Conflicting results concerning coccolithophore calcification have been reported from both experimental and field studies. Due to their minute size, it is difficult to estimate the amount of calcite in coccoliths. Here we apply the SYRACO system to analyzing the weights and lengths of coccoliths produced by the dominant coccolithophore family Noelaerhabdaceae. We obtain high-resolution coccolith weight and length records of GEO (Gephyrocapsa oceanica) and SPC (Emiliania huxleyi and small Gephyrocapsa spp.) groups from sediment core MD05-2904 in the northern South China Sea (SCS) over the past 200 kyr. A calcification index (CI) based on the coccolith weight and length is applied to evaluate the changes in coccolithophore calcification. The two groups of coccolith weights / CIs show different patterns on long term variations and during the last two terminations. We compare the coccolith weight and CI records with the environmental variables and carbonate chemistry parameters calculated in the same core. Our data reveals that sea surface temperature and insolation have weak correlations to coccolith weight and CI on long-term variations. The SPC weight / CI are correlated with the seawater pH and pCO(2) variations while the GEO weight/ CI are more related to the nutrient variations. This implies a more significant role of ocean carbonate chemistry in the calcification of less calcified coccolithophores and nutrient concentration in the heavier calcifying coccolithophores. Article in Journal/Newspaper Ocean acidification Aix-Marseille Université: HAL Marine Micropaleontology 154 101798 |
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Open Polar |
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Aix-Marseille Université: HAL |
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ftunivaixmarseil |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.BE]Environmental Sciences/Biodiversity and Ecology Su, Xiang Liu, Chuanlian Beaufort, Luc, L Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Coccolithophores are one of the most abundant and widespread groups of calcifying plankton and have attracted extensive study in terms of their likely response to ocean acidification. Conflicting results concerning coccolithophore calcification have been reported from both experimental and field studies. Due to their minute size, it is difficult to estimate the amount of calcite in coccoliths. Here we apply the SYRACO system to analyzing the weights and lengths of coccoliths produced by the dominant coccolithophore family Noelaerhabdaceae. We obtain high-resolution coccolith weight and length records of GEO (Gephyrocapsa oceanica) and SPC (Emiliania huxleyi and small Gephyrocapsa spp.) groups from sediment core MD05-2904 in the northern South China Sea (SCS) over the past 200 kyr. A calcification index (CI) based on the coccolith weight and length is applied to evaluate the changes in coccolithophore calcification. The two groups of coccolith weights / CIs show different patterns on long term variations and during the last two terminations. We compare the coccolith weight and CI records with the environmental variables and carbonate chemistry parameters calculated in the same core. Our data reveals that sea surface temperature and insolation have weak correlations to coccolith weight and CI on long-term variations. The SPC weight / CI are correlated with the seawater pH and pCO(2) variations while the GEO weight/ CI are more related to the nutrient variations. This implies a more significant role of ocean carbonate chemistry in the calcification of less calcified coccolithophores and nutrient concentration in the heavier calcifying coccolithophores. |
author2 |
State Key Laboratory of Marine Geology Shanghai Tongji University Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Su, Xiang Liu, Chuanlian Beaufort, Luc, L |
author_facet |
Su, Xiang Liu, Chuanlian Beaufort, Luc, L |
author_sort |
Su, Xiang |
title |
Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
title_short |
Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
title_full |
Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
title_fullStr |
Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
title_full_unstemmed |
Late Quaternary coccolith weight variations in the northern South China Sea and their environmental controls |
title_sort |
late quaternary coccolith weight variations in the northern south china sea and their environmental controls |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02409222 https://doi.org/10.1016/j.marmicro.2019.101798 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 0377-8398 Marine Micropaleontology https://hal.science/hal-02409222 Marine Micropaleontology, 2020, 154, ⟨10.1016/j.marmicro.2019.101798⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2019.101798 hal-02409222 https://hal.science/hal-02409222 doi:10.1016/j.marmicro.2019.101798 WOS: 000515215200005 |
op_doi |
https://doi.org/10.1016/j.marmicro.2019.101798 |
container_title |
Marine Micropaleontology |
container_volume |
154 |
container_start_page |
101798 |
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1797591453791158272 |