Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis
WOS:000450278800002 International audience The rapidly intensifying process of ocean acidification (OA) due to anthropogenic CO2 is not only depleting carbonate ions necessary for calcification but also causing acidosis and disrupting internal pH homeostasis in several marine organisms. These negati...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-02635027 https://hal.science/hal-02635027/document https://hal.science/hal-02635027/file/Meng_etal_Biogeosciences_2018.pdf https://doi.org/10.5194/bg-15-6833-2018 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
ACL calcification pacific oyster energy-metabolism eastern oysters carbonic-acid crassostrea-virginica elevated co2 levels high-co2 world marine bivalves mercenaria-mercenaria [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
ACL calcification pacific oyster energy-metabolism eastern oysters carbonic-acid crassostrea-virginica elevated co2 levels high-co2 world marine bivalves mercenaria-mercenaria [SDE.BE]Environmental Sciences/Biodiversity and Ecology Meng, Yuan Guo, Zhenbin Fitzer, Susan C. Upadhyay, Abhishek Chan, Vera B. S. Li, Chaoyi Cusack, Maggie Yao, Haimin Yeung, Kelvin W. K. Thiyagarajan, Vengatesen Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
topic_facet |
ACL calcification pacific oyster energy-metabolism eastern oysters carbonic-acid crassostrea-virginica elevated co2 levels high-co2 world marine bivalves mercenaria-mercenaria [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
WOS:000450278800002 International audience The rapidly intensifying process of ocean acidification (OA) due to anthropogenic CO2 is not only depleting carbonate ions necessary for calcification but also causing acidosis and disrupting internal pH homeostasis in several marine organisms. These negative consequences of OA on marine calcifiers, i.e. oyster species, have been very well documented in recent studies; however, the consequences of reduced or impaired calcification on the end-product, shells or skeletons, still remain one of the major research gaps. Shells produced by marine organisms under OA are expected to show signs of dissolution, disorganized microstructure and reduced mechanical properties. To bridge this knowledge gap and to test the above hypothesis, we investigated the effect of OA on juvenile shells of the commercially important oyster species, Magallana angulata, at ecologically and climatically relevant OA levels (using pH 8.1, 7.8, 7.5, 7.2). In lower pH conditions, a drop of shell hardness and stiffness was revealed by nanoindentation tests, while an evident porous internal microstructure was detected by scanning electron microscopy. Crystallographic orientation, on the other hand, showed no significant difference with decreasing pH using electron back-scattered diffraction (EBSD). These results indicate the porous internal microstructure may be the cause of the reduction in shell hardness and stiffness. The overall decrease of shell density observed from micro-computed tomography analysis indicates the porous internal microstructure may run through the shell, thus inevitably limiting the effectiveness of the shell's defensive function. This study shows the potential deterioration of oyster shells induced by OA, especially in their early life stage. This knowledge is critical to estimate the survival and production of edible oysters in the future ocean. |
author2 |
The University of Hong Kong (HKU) Department of Mechanical Engineering Hong Kong The Hong Kong Polytechnic University Hong Kong (POLYU) Faculty of Natural Sciences Stirling University of Stirling Department of Biological Sciences Clemson Clemson University Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Meng, Yuan Guo, Zhenbin Fitzer, Susan C. Upadhyay, Abhishek Chan, Vera B. S. Li, Chaoyi Cusack, Maggie Yao, Haimin Yeung, Kelvin W. K. Thiyagarajan, Vengatesen |
author_facet |
Meng, Yuan Guo, Zhenbin Fitzer, Susan C. Upadhyay, Abhishek Chan, Vera B. S. Li, Chaoyi Cusack, Maggie Yao, Haimin Yeung, Kelvin W. K. Thiyagarajan, Vengatesen |
author_sort |
Meng, Yuan |
title |
Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
title_short |
Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
title_full |
Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
title_fullStr |
Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
title_full_unstemmed |
Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis |
title_sort |
ocean acidification reduces hardness and stiffness of the portuguese oyster shell with impaired microstructure: a hierarchical analysis |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02635027 https://hal.science/hal-02635027/document https://hal.science/hal-02635027/file/Meng_etal_Biogeosciences_2018.pdf https://doi.org/10.5194/bg-15-6833-2018 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Carbonic acid Ocean acidification Pacific oyster |
genre_facet |
Carbonic acid Ocean acidification Pacific oyster |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02635027 Biogeosciences, 2018, 15 (22), pp.6833-6846. ⟨10.5194/bg-15-6833-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-6833-2018 hal-02635027 https://hal.science/hal-02635027 https://hal.science/hal-02635027/document https://hal.science/hal-02635027/file/Meng_etal_Biogeosciences_2018.pdf doi:10.5194/bg-15-6833-2018 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-15-6833-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
22 |
container_start_page |
6833 |
op_container_end_page |
6846 |
_version_ |
1790598965399388160 |
spelling |
ftinsu:oai:HAL:hal-02635027v1 2024-02-11T10:02:53+01:00 Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis Meng, Yuan Guo, Zhenbin Fitzer, Susan C. Upadhyay, Abhishek Chan, Vera B. S. Li, Chaoyi Cusack, Maggie Yao, Haimin Yeung, Kelvin W. K. Thiyagarajan, Vengatesen The University of Hong Kong (HKU) Department of Mechanical Engineering Hong Kong The Hong Kong Polytechnic University Hong Kong (POLYU) Faculty of Natural Sciences Stirling University of Stirling Department of Biological Sciences Clemson Clemson University Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2018 https://hal.science/hal-02635027 https://hal.science/hal-02635027/document https://hal.science/hal-02635027/file/Meng_etal_Biogeosciences_2018.pdf https://doi.org/10.5194/bg-15-6833-2018 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-6833-2018 hal-02635027 https://hal.science/hal-02635027 https://hal.science/hal-02635027/document https://hal.science/hal-02635027/file/Meng_etal_Biogeosciences_2018.pdf doi:10.5194/bg-15-6833-2018 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02635027 Biogeosciences, 2018, 15 (22), pp.6833-6846. ⟨10.5194/bg-15-6833-2018⟩ ACL calcification pacific oyster energy-metabolism eastern oysters carbonic-acid crassostrea-virginica elevated co2 levels high-co2 world marine bivalves mercenaria-mercenaria [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2018 ftinsu https://doi.org/10.5194/bg-15-6833-2018 2024-01-24T17:34:06Z WOS:000450278800002 International audience The rapidly intensifying process of ocean acidification (OA) due to anthropogenic CO2 is not only depleting carbonate ions necessary for calcification but also causing acidosis and disrupting internal pH homeostasis in several marine organisms. These negative consequences of OA on marine calcifiers, i.e. oyster species, have been very well documented in recent studies; however, the consequences of reduced or impaired calcification on the end-product, shells or skeletons, still remain one of the major research gaps. Shells produced by marine organisms under OA are expected to show signs of dissolution, disorganized microstructure and reduced mechanical properties. To bridge this knowledge gap and to test the above hypothesis, we investigated the effect of OA on juvenile shells of the commercially important oyster species, Magallana angulata, at ecologically and climatically relevant OA levels (using pH 8.1, 7.8, 7.5, 7.2). In lower pH conditions, a drop of shell hardness and stiffness was revealed by nanoindentation tests, while an evident porous internal microstructure was detected by scanning electron microscopy. Crystallographic orientation, on the other hand, showed no significant difference with decreasing pH using electron back-scattered diffraction (EBSD). These results indicate the porous internal microstructure may be the cause of the reduction in shell hardness and stiffness. The overall decrease of shell density observed from micro-computed tomography analysis indicates the porous internal microstructure may run through the shell, thus inevitably limiting the effectiveness of the shell's defensive function. This study shows the potential deterioration of oyster shells induced by OA, especially in their early life stage. This knowledge is critical to estimate the survival and production of edible oysters in the future ocean. Article in Journal/Newspaper Carbonic acid Ocean acidification Pacific oyster Institut national des sciences de l'Univers: HAL-INSU Pacific Biogeosciences 15 22 6833 6846 |