Decrease in coccolithophore calcification and CO2 since the middle Miocene
International audience Marine algae are instrumental in carbon cycling and atmospheric carbon dioxide (CO2) regulation. One group, coccolithophores, uses carbon to photosynthesize and to calcify, covering their cells with chalk platelets (coccoliths). How ocean acidification influences coccolithopho...
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ftunivnantes:oai:HAL:hal-01277350v1 2023-05-15T17:51:14+02:00 Decrease in coccolithophore calcification and CO2 since the middle Miocene Bolton, Clara T. Hernández-Sánchez, María T. Fuertes, Miguel-Ángel González-Lemos, Saúl Abrevaya, Lorena Mendez-Vicente, Ana Flores, José-Abel Probert, Ian Giosan, Liviu Johnson, Joel Stoll, Heather M. Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) Geology Department Universidad de Oviedo Oviedo Grupo de Geociencias Oceánicas Universidad de Salamanca Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Department of Geology and Geophysics Woods Hole Woods Hole Oceanographic Institution (WHOI) Department of Earth Sciences UNH Durham University of New Hampshire (UNH) 2015 https://hal.sorbonne-universite.fr/hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350/document https://hal.sorbonne-universite.fr/hal-01277350/file/gbc20392.pdf https://doi.org/10.1038/ncomms10284 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms10284 hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350/document https://hal.sorbonne-universite.fr/hal-01277350/file/gbc20392.pdf doi:10.1038/ncomms10284 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-01277350 Nature Communications, Nature Publishing Group, 2015, 7, pp.10284. ⟨10.1038/ncomms10284⟩ Earth sciences Biogeochemistry Climate science Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1038/ncomms10284 2022-10-19T00:18:04Z International audience Marine algae are instrumental in carbon cycling and atmospheric carbon dioxide (CO2) regulation. One group, coccolithophores, uses carbon to photosynthesize and to calcify, covering their cells with chalk platelets (coccoliths). How ocean acidification influences coccolithophore calcification is strongly debated, and the effects of carbonate chemistry changes in the geological past are poorly understood. This paper relates degree of coccolith calcification to cellular calcification, and presents the first records of size-normalized coccolith thickness spanning the last 14 Myr from tropical oceans. Degree of calcification was highest in the low-pH, high-CO2 Miocene ocean, but decreased significantly between 6 and 4 Myr ago. Based on this and concurrent trends in a new alkenone εp record, we propose that decreasing CO2 partly drove the observed trend via reduced cellular bicarbonate allocation to calcification. This trend reversed in the late Pleistocene despite low CO2, suggesting an additional regulator of calcification such as alkalinity. Article in Journal/Newspaper Ocean acidification Université de Nantes: HAL-UNIV-NANTES Nature Communications 7 1 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Earth sciences Biogeochemistry Climate science Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Earth sciences Biogeochemistry Climate science Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Bolton, Clara T. Hernández-Sánchez, María T. Fuertes, Miguel-Ángel González-Lemos, Saúl Abrevaya, Lorena Mendez-Vicente, Ana Flores, José-Abel Probert, Ian Giosan, Liviu Johnson, Joel Stoll, Heather M. Decrease in coccolithophore calcification and CO2 since the middle Miocene |
topic_facet |
Earth sciences Biogeochemistry Climate science Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Marine algae are instrumental in carbon cycling and atmospheric carbon dioxide (CO2) regulation. One group, coccolithophores, uses carbon to photosynthesize and to calcify, covering their cells with chalk platelets (coccoliths). How ocean acidification influences coccolithophore calcification is strongly debated, and the effects of carbonate chemistry changes in the geological past are poorly understood. This paper relates degree of coccolith calcification to cellular calcification, and presents the first records of size-normalized coccolith thickness spanning the last 14 Myr from tropical oceans. Degree of calcification was highest in the low-pH, high-CO2 Miocene ocean, but decreased significantly between 6 and 4 Myr ago. Based on this and concurrent trends in a new alkenone εp record, we propose that decreasing CO2 partly drove the observed trend via reduced cellular bicarbonate allocation to calcification. This trend reversed in the late Pleistocene despite low CO2, suggesting an additional regulator of calcification such as alkalinity. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) Geology Department Universidad de Oviedo Oviedo Grupo de Geociencias Oceánicas Universidad de Salamanca Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Department of Geology and Geophysics Woods Hole Woods Hole Oceanographic Institution (WHOI) Department of Earth Sciences UNH Durham University of New Hampshire (UNH) |
format |
Article in Journal/Newspaper |
author |
Bolton, Clara T. Hernández-Sánchez, María T. Fuertes, Miguel-Ángel González-Lemos, Saúl Abrevaya, Lorena Mendez-Vicente, Ana Flores, José-Abel Probert, Ian Giosan, Liviu Johnson, Joel Stoll, Heather M. |
author_facet |
Bolton, Clara T. Hernández-Sánchez, María T. Fuertes, Miguel-Ángel González-Lemos, Saúl Abrevaya, Lorena Mendez-Vicente, Ana Flores, José-Abel Probert, Ian Giosan, Liviu Johnson, Joel Stoll, Heather M. |
author_sort |
Bolton, Clara T. |
title |
Decrease in coccolithophore calcification and CO2 since the middle Miocene |
title_short |
Decrease in coccolithophore calcification and CO2 since the middle Miocene |
title_full |
Decrease in coccolithophore calcification and CO2 since the middle Miocene |
title_fullStr |
Decrease in coccolithophore calcification and CO2 since the middle Miocene |
title_full_unstemmed |
Decrease in coccolithophore calcification and CO2 since the middle Miocene |
title_sort |
decrease in coccolithophore calcification and co2 since the middle miocene |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350/document https://hal.sorbonne-universite.fr/hal-01277350/file/gbc20392.pdf https://doi.org/10.1038/ncomms10284 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-01277350 Nature Communications, Nature Publishing Group, 2015, 7, pp.10284. ⟨10.1038/ncomms10284⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms10284 hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350 https://hal.sorbonne-universite.fr/hal-01277350/document https://hal.sorbonne-universite.fr/hal-01277350/file/gbc20392.pdf doi:10.1038/ncomms10284 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/ncomms10284 |
container_title |
Nature Communications |
container_volume |
7 |
container_issue |
1 |
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1766158323288113152 |