Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals
International audience The lithium isotope compositions ((7)Li/(6)Li) and Li/Ca ratios of shallow-water and deep-sea corals (Porites lutea, Cladocora caespitosa, Lophelia pertusa and Desmophyllum cristagalli) were measured using a Cameca ims 1270 ion microprobe. The two C. caespitosa samples were gr...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal.science/hal-03505012 https://doi.org/10.1016/j.epsl.2009.06.015 |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Rollion-Bard, Claire Vigier, Nathalie Meibom, Anders Blamart, Dominique Reynaud, Stephanie Rodolfo-Metalpa, Riccardo Martin, Sophie Gattuso, Jean-Pierre Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The lithium isotope compositions ((7)Li/(6)Li) and Li/Ca ratios of shallow-water and deep-sea corals (Porites lutea, Cladocora caespitosa, Lophelia pertusa and Desmophyllum cristagalli) were measured using a Cameca ims 1270 ion microprobe. The two C. caespitosa samples were grown under controlled conditions at CO(2) partial pressures (pCO(2)) of 416 +/- 29 mu atm and 729 +/- 30 mu atm, respectively. In situ analyses show that all samples are isotopically homogeneous (within analytical precision, +/- 1.1 parts per thousand, 1 sigma) and display significantly lower delta(7)Li values relative to seawater. indicating a significant isotope fractionation during aragonite formation. In contrast to all other elements analysed so far, there is no relationship between the Li isotopic compositions and the skeletal ultrastructure. However, Li/Ca does show variation correlated with ultrastructure, albeit with significant differences between species. This implies that the bio mineralization mechanisms, which are supposed to be different for the different skeletal components, do not influence the Li isotopic composition in corals. In particular, the model of Rayleigh fractionation in a semi-enclosed calcifying fluid is incompatible with the homogeneity of the Li isotope compositions at the micrometer scale We also. show that changes in pCO(2) (and pH) do not significantly affect the Li isotope signature. Nevertheless, a small but significant and systematic difference in Li isotopic composition is observed between deep-sea azooxanthellate and shallow-water zooxanthellate corals. The lack of dependence on pH and pCO(2) and on skeletal ultrastructure indicates that the U isotopic signature of corals could be used as a proxy for reconstructing the paleo-delta(7)Li of seawater and, potentially, for deconvolving past continental weathering rates. (C) 2009 Elsevier B.V. All rights reserved. |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Museum of Natural History Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Centre Scientifique de Monaco (CSM) Biocomplexité des écosystèmes coralliens de l'Indo-Pacifique (CoReUS2) Institut de Recherche pour le Développement (IRD) Marine Biology and Ecology Research Centre, School of Marine Science and Engineering Plymouth University Marine Environment Laboratories Monaco (IAEA-MEL) International Atomic Energy Agency Vienna (IAEA) |
format |
Article in Journal/Newspaper |
author |
Rollion-Bard, Claire Vigier, Nathalie Meibom, Anders Blamart, Dominique Reynaud, Stephanie Rodolfo-Metalpa, Riccardo Martin, Sophie Gattuso, Jean-Pierre |
author_facet |
Rollion-Bard, Claire Vigier, Nathalie Meibom, Anders Blamart, Dominique Reynaud, Stephanie Rodolfo-Metalpa, Riccardo Martin, Sophie Gattuso, Jean-Pierre |
author_sort |
Rollion-Bard, Claire |
title |
Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
title_short |
Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
title_full |
Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
title_fullStr |
Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
title_full_unstemmed |
Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals |
title_sort |
effect of environmental conditions and skeletal ultrastructure on the li isotopic composition of scleractinian corals |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-03505012 https://doi.org/10.1016/j.epsl.2009.06.015 |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03505012 Earth and Planetary Science Letters, 2009, 286 (1-2), pp.63-70. ⟨10.1016/j.epsl.2009.06.015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.06.015 hal-03505012 https://hal.science/hal-03505012 doi:10.1016/j.epsl.2009.06.015 |
op_doi |
https://doi.org/10.1016/j.epsl.2009.06.015 |
container_title |
Earth and Planetary Science Letters |
container_volume |
286 |
container_issue |
1-2 |
container_start_page |
63 |
op_container_end_page |
70 |
_version_ |
1801378812766715904 |
spelling |
ftceafr:oai:HAL:hal-03505012v1 2024-06-09T07:47:36+00:00 Effect of environmental conditions and skeletal ultrastructure on the Li isotopic composition of scleractinian corals Rollion-Bard, Claire Vigier, Nathalie Meibom, Anders Blamart, Dominique Reynaud, Stephanie Rodolfo-Metalpa, Riccardo Martin, Sophie Gattuso, Jean-Pierre Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Museum of Natural History Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Centre Scientifique de Monaco (CSM) Biocomplexité des écosystèmes coralliens de l'Indo-Pacifique (CoReUS2) Institut de Recherche pour le Développement (IRD) Marine Biology and Ecology Research Centre, School of Marine Science and Engineering Plymouth University Marine Environment Laboratories Monaco (IAEA-MEL) International Atomic Energy Agency Vienna (IAEA) 2009 https://hal.science/hal-03505012 https://doi.org/10.1016/j.epsl.2009.06.015 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.06.015 hal-03505012 https://hal.science/hal-03505012 doi:10.1016/j.epsl.2009.06.015 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03505012 Earth and Planetary Science Letters, 2009, 286 (1-2), pp.63-70. ⟨10.1016/j.epsl.2009.06.015⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftceafr https://doi.org/10.1016/j.epsl.2009.06.015 2024-05-16T13:56:45Z International audience The lithium isotope compositions ((7)Li/(6)Li) and Li/Ca ratios of shallow-water and deep-sea corals (Porites lutea, Cladocora caespitosa, Lophelia pertusa and Desmophyllum cristagalli) were measured using a Cameca ims 1270 ion microprobe. The two C. caespitosa samples were grown under controlled conditions at CO(2) partial pressures (pCO(2)) of 416 +/- 29 mu atm and 729 +/- 30 mu atm, respectively. In situ analyses show that all samples are isotopically homogeneous (within analytical precision, +/- 1.1 parts per thousand, 1 sigma) and display significantly lower delta(7)Li values relative to seawater. indicating a significant isotope fractionation during aragonite formation. In contrast to all other elements analysed so far, there is no relationship between the Li isotopic compositions and the skeletal ultrastructure. However, Li/Ca does show variation correlated with ultrastructure, albeit with significant differences between species. This implies that the bio mineralization mechanisms, which are supposed to be different for the different skeletal components, do not influence the Li isotopic composition in corals. In particular, the model of Rayleigh fractionation in a semi-enclosed calcifying fluid is incompatible with the homogeneity of the Li isotope compositions at the micrometer scale We also. show that changes in pCO(2) (and pH) do not significantly affect the Li isotope signature. Nevertheless, a small but significant and systematic difference in Li isotopic composition is observed between deep-sea azooxanthellate and shallow-water zooxanthellate corals. The lack of dependence on pH and pCO(2) and on skeletal ultrastructure indicates that the U isotopic signature of corals could be used as a proxy for reconstructing the paleo-delta(7)Li of seawater and, potentially, for deconvolving past continental weathering rates. (C) 2009 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Lophelia pertusa HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Earth and Planetary Science Letters 286 1-2 63 70 |