Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima
International audience Many reef organisms, such as the giant clams, are confronted with global change effects. Abnormally high seawater temperatures can lead to mass bleaching events and subsequent mortality, while ocean acidification may impact biomineralization processes. Despite its strong ecolo...
Published in: | Conservation Physiology |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586/document https://hal.archives-ouvertes.fr/hal-03265586/file/Brahmi-2021-ConservPhysiol-Effect.pdf https://doi.org/10.1093/conphys/coab041 |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Giant clams ocean acidification photosynthetic yield respiration symbionts thermal stress [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology |
spellingShingle |
Giant clams ocean acidification photosynthetic yield respiration symbionts thermal stress [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology Brahmi, Chloé Chapron, Leila Le Moullac, Gilles Soyez, Claude Beliaeff, Benoît Lazareth, Claire, Gaertner-Mazouni, Nabila Vidal-Dupiol, Jeremie Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
topic_facet |
Giant clams ocean acidification photosynthetic yield respiration symbionts thermal stress [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology |
description |
International audience Many reef organisms, such as the giant clams, are confronted with global change effects. Abnormally high seawater temperatures can lead to mass bleaching events and subsequent mortality, while ocean acidification may impact biomineralization processes. Despite its strong ecological and socio-economic importance, its responses to these threats still need to be explored. We investigated physiological responses of 4-year-old Tridacna maxima to realistic levels of temperature (+1.5°C) and partial pressure of carbon dioxide (pCO2) (+800 μatm of CO2) predicted for 2100 in French Polynesian lagoons during the warmer season. During a 65-day crossed-factorial experiment, individuals were exposed to two temperatures (29.2°C, 30.7°C) and two pCO2 (430 μatm, 1212 μatm) conditions. The impact of each environmental parameter and their potential synergetic effect were evaluated based on respiration, biomineralization and photophysiology. Kinetics of thermal and/or acidification stress were evaluated by performing measurements at different times of exposure (29, 41, 53, 65 days). At 30.7°C, the holobiont O2 production, symbiont photosynthetic yield and density were negatively impacted. High pCO2 had a significant negative effect on shell growth rate, symbiont photosynthetic yield and density. No significant differences of the shell microstructure were observed between control and experimental conditions in the first 29 days; however, modifications (i.e. less-cohesive lamellae) appeared from 41 days in all temperature and pCO2 conditions. No significant synergetic effect was found. Present thermal conditions (29.2°C) appeared to be sufficiently stressful to induce a host acclimatization response. All these observations indicate that temperature and pCO2 are both forcing variables affecting T. maxima’s physiology and jeopardize its survival under environmental conditions predicted for the end of this century. |
author2 |
Université de la Polynésie Française (UPF) Ecosystèmes Insulaires Océaniens (UMR 241) (EIO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Polynésie Française (UPF)-Institut Louis Malardé Papeete (ILM) Institut de Recherche pour le Développement (IRD) School of Earth Sciences Columbus Ohio State University Columbus (OSU) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Interactions Hôtes-Pathogènes-Environnements (IHPE) Université de Perpignan Via Domitia (UPVD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) |
format |
Article in Journal/Newspaper |
author |
Brahmi, Chloé Chapron, Leila Le Moullac, Gilles Soyez, Claude Beliaeff, Benoît Lazareth, Claire, Gaertner-Mazouni, Nabila Vidal-Dupiol, Jeremie |
author_facet |
Brahmi, Chloé Chapron, Leila Le Moullac, Gilles Soyez, Claude Beliaeff, Benoît Lazareth, Claire, Gaertner-Mazouni, Nabila Vidal-Dupiol, Jeremie |
author_sort |
Brahmi, Chloé |
title |
Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
title_short |
Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
title_full |
Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
title_fullStr |
Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
title_full_unstemmed |
Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima |
title_sort |
effects of elevated temperature and p co2 on the respiration, biomineralization and photophysiology of the giant clam tridacna maxima |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586/document https://hal.archives-ouvertes.fr/hal-03265586/file/Brahmi-2021-ConservPhysiol-Effect.pdf https://doi.org/10.1093/conphys/coab041 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 2051-1434 EISSN: 2051-1434 Conservation Physiology https://hal.archives-ouvertes.fr/hal-03265586 Conservation Physiology, 2021, 9 (1), pp.coab041. ⟨10.1093/conphys/coab041⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/conphys/coab041 hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586/document https://hal.archives-ouvertes.fr/hal-03265586/file/Brahmi-2021-ConservPhysiol-Effect.pdf doi:10.1093/conphys/coab041 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/conphys/coab041 |
container_title |
Conservation Physiology |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766157966436728832 |
spelling |
ftunivnantes:oai:HAL:hal-03265586v1 2023-05-15T17:51:00+02:00 Effects of elevated temperature and p CO2 on the respiration, biomineralization and photophysiology of the giant clam Tridacna maxima Brahmi, Chloé Chapron, Leila Le Moullac, Gilles Soyez, Claude Beliaeff, Benoît Lazareth, Claire, Gaertner-Mazouni, Nabila Vidal-Dupiol, Jeremie Université de la Polynésie Française (UPF) Ecosystèmes Insulaires Océaniens (UMR 241) (EIO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Polynésie Française (UPF)-Institut Louis Malardé Papeete (ILM) Institut de Recherche pour le Développement (IRD) School of Earth Sciences Columbus Ohio State University Columbus (OSU) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Interactions Hôtes-Pathogènes-Environnements (IHPE) Université de Perpignan Via Domitia (UPVD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) 2021 https://hal.archives-ouvertes.fr/hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586/document https://hal.archives-ouvertes.fr/hal-03265586/file/Brahmi-2021-ConservPhysiol-Effect.pdf https://doi.org/10.1093/conphys/coab041 en eng HAL CCSD Oxford University Press info:eu-repo/semantics/altIdentifier/doi/10.1093/conphys/coab041 hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586 https://hal.archives-ouvertes.fr/hal-03265586/document https://hal.archives-ouvertes.fr/hal-03265586/file/Brahmi-2021-ConservPhysiol-Effect.pdf doi:10.1093/conphys/coab041 info:eu-repo/semantics/OpenAccess ISSN: 2051-1434 EISSN: 2051-1434 Conservation Physiology https://hal.archives-ouvertes.fr/hal-03265586 Conservation Physiology, 2021, 9 (1), pp.coab041. ⟨10.1093/conphys/coab041⟩ Giant clams ocean acidification photosynthetic yield respiration symbionts thermal stress [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1093/conphys/coab041 2022-12-07T00:58:50Z International audience Many reef organisms, such as the giant clams, are confronted with global change effects. Abnormally high seawater temperatures can lead to mass bleaching events and subsequent mortality, while ocean acidification may impact biomineralization processes. Despite its strong ecological and socio-economic importance, its responses to these threats still need to be explored. We investigated physiological responses of 4-year-old Tridacna maxima to realistic levels of temperature (+1.5°C) and partial pressure of carbon dioxide (pCO2) (+800 μatm of CO2) predicted for 2100 in French Polynesian lagoons during the warmer season. During a 65-day crossed-factorial experiment, individuals were exposed to two temperatures (29.2°C, 30.7°C) and two pCO2 (430 μatm, 1212 μatm) conditions. The impact of each environmental parameter and their potential synergetic effect were evaluated based on respiration, biomineralization and photophysiology. Kinetics of thermal and/or acidification stress were evaluated by performing measurements at different times of exposure (29, 41, 53, 65 days). At 30.7°C, the holobiont O2 production, symbiont photosynthetic yield and density were negatively impacted. High pCO2 had a significant negative effect on shell growth rate, symbiont photosynthetic yield and density. No significant differences of the shell microstructure were observed between control and experimental conditions in the first 29 days; however, modifications (i.e. less-cohesive lamellae) appeared from 41 days in all temperature and pCO2 conditions. No significant synergetic effect was found. Present thermal conditions (29.2°C) appeared to be sufficiently stressful to induce a host acclimatization response. All these observations indicate that temperature and pCO2 are both forcing variables affecting T. maxima’s physiology and jeopardize its survival under environmental conditions predicted for the end of this century. Article in Journal/Newspaper Ocean acidification Université de Nantes: HAL-UNIV-NANTES Conservation Physiology 9 1 |