Impacts of ocean acidification on temperate benthic calcifying organisms
The anthropogenic increase in atmospheric CO2 partial pressure (pCO2) causes a decrease in seawater pH and changes in carbonate chemistry called ocean acidification (OA). All the marine species could be impacted by OA but calcifying organisms are known to be the most sensitive. This PhD thesis focus...
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ftsorbonneuniv:oai:HAL:tel-00925830v1 2023-06-11T04:15:36+02:00 Impacts of ocean acidification on temperate benthic calcifying organisms Impacts de l'acidification des océans sur les organismes benthiques calcifiants des milieux côtiers tempérés Noisette, Fanny Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Dominique Davoult et Sophie Martin(davoult@sb-roscoff.fr / sophie.martin@sb-roscoff.fr) 2013-12-11 https://theses.hal.science/tel-00925830 https://theses.hal.science/tel-00925830/document https://theses.hal.science/tel-00925830/file/These_F.Noisette_2013.12.11.pdf fr fre HAL CCSD tel-00925830 https://theses.hal.science/tel-00925830 https://theses.hal.science/tel-00925830/document https://theses.hal.science/tel-00925830/file/These_F.Noisette_2013.12.11.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00925830 Ecologie, Environnement. Université Pierre et Marie Curie - Paris VI, 2013. Français. ⟨NNT : ⟩ coastal ecosytems Crepidula fornicata ecophysiology global change Lithothamnion corallioides metabolism ocean acidification acidification des océans calcification changement global crépidule écophysiologie écosystèmes côtiers maërl métabolisme [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/doctoralThesis Theses 2013 ftsorbonneuniv 2023-05-29T16:06:26Z The anthropogenic increase in atmospheric CO2 partial pressure (pCO2) causes a decrease in seawater pH and changes in carbonate chemistry called ocean acidification (OA). All the marine species could be impacted by OA but calcifying organisms are known to be the most sensitive. This PhD thesis focused on the physiological responses of coralline algae (red calcareous algae) and the slipper limpet Crepidula fornicata (gastropod mollusc) exposed to current and future pCO2 conditions. Coralline algae showed variable species-specific responses to OA with a lack of effect in Corallina officinalis and a 80 % decrease in diel net calcification in Lithothamnion corallioides (maerl). Conversely, C. fornicata was highly tolerant to OA. Although net calcification decreased due to external shell dissolution, no metabolic depression has been shown under high pCO2. Size of early life stages (embryos and larvae) decreased with increasing pCO2 but there were no effect on larval respiration and survival. These calcifying species are of major ecological importance in coastal ecosystems from the Channel and Northeastern Atlantic. Changes induced by OA on the physiology of these key species are likely to impact energy and matter fluxes in the ecosystems they dominate. L'acidification des océans (AO) est un phénomène induit par l'augmentation de la pression partielle en CO2 (pCO2) atmosphérique d'origine anthropique caractérisé par une diminution du pH de l'eau de mer et une modification des paramètres de la chimie des carbonates. L'AO est susceptible d'impacter toutes les espèces marines mais les organismes calcifiants y seraient les plus sensibles. Dans le cadre de cette thèse, les réponses physiologiques des algues Corallinacées (algues rouges calcaires) et de la crépidule (mollusque gastéropode) ont été étudiées sous des conditions de pCO2 actuelles et prévues pour la fin du siècle. Les réponses des Corallinacées à l'AO en termes de production primaire et de calcification ont varié suivant les espèces, d'une absence de réponse ... Doctoral or Postdoctoral Thesis Ocean acidification HAL Sorbonne Université |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
French |
topic |
coastal ecosytems Crepidula fornicata ecophysiology global change Lithothamnion corallioides metabolism ocean acidification acidification des océans calcification changement global crépidule écophysiologie écosystèmes côtiers maërl métabolisme [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
coastal ecosytems Crepidula fornicata ecophysiology global change Lithothamnion corallioides metabolism ocean acidification acidification des océans calcification changement global crépidule écophysiologie écosystèmes côtiers maërl métabolisme [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology Noisette, Fanny Impacts of ocean acidification on temperate benthic calcifying organisms |
topic_facet |
coastal ecosytems Crepidula fornicata ecophysiology global change Lithothamnion corallioides metabolism ocean acidification acidification des océans calcification changement global crépidule écophysiologie écosystèmes côtiers maërl métabolisme [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
The anthropogenic increase in atmospheric CO2 partial pressure (pCO2) causes a decrease in seawater pH and changes in carbonate chemistry called ocean acidification (OA). All the marine species could be impacted by OA but calcifying organisms are known to be the most sensitive. This PhD thesis focused on the physiological responses of coralline algae (red calcareous algae) and the slipper limpet Crepidula fornicata (gastropod mollusc) exposed to current and future pCO2 conditions. Coralline algae showed variable species-specific responses to OA with a lack of effect in Corallina officinalis and a 80 % decrease in diel net calcification in Lithothamnion corallioides (maerl). Conversely, C. fornicata was highly tolerant to OA. Although net calcification decreased due to external shell dissolution, no metabolic depression has been shown under high pCO2. Size of early life stages (embryos and larvae) decreased with increasing pCO2 but there were no effect on larval respiration and survival. These calcifying species are of major ecological importance in coastal ecosystems from the Channel and Northeastern Atlantic. Changes induced by OA on the physiology of these key species are likely to impact energy and matter fluxes in the ecosystems they dominate. L'acidification des océans (AO) est un phénomène induit par l'augmentation de la pression partielle en CO2 (pCO2) atmosphérique d'origine anthropique caractérisé par une diminution du pH de l'eau de mer et une modification des paramètres de la chimie des carbonates. L'AO est susceptible d'impacter toutes les espèces marines mais les organismes calcifiants y seraient les plus sensibles. Dans le cadre de cette thèse, les réponses physiologiques des algues Corallinacées (algues rouges calcaires) et de la crépidule (mollusque gastéropode) ont été étudiées sous des conditions de pCO2 actuelles et prévues pour la fin du siècle. Les réponses des Corallinacées à l'AO en termes de production primaire et de calcification ont varié suivant les espèces, d'une absence de réponse ... |
author2 |
Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris VI Dominique Davoult et Sophie Martin(davoult@sb-roscoff.fr / sophie.martin@sb-roscoff.fr) |
format |
Doctoral or Postdoctoral Thesis |
author |
Noisette, Fanny |
author_facet |
Noisette, Fanny |
author_sort |
Noisette, Fanny |
title |
Impacts of ocean acidification on temperate benthic calcifying organisms |
title_short |
Impacts of ocean acidification on temperate benthic calcifying organisms |
title_full |
Impacts of ocean acidification on temperate benthic calcifying organisms |
title_fullStr |
Impacts of ocean acidification on temperate benthic calcifying organisms |
title_full_unstemmed |
Impacts of ocean acidification on temperate benthic calcifying organisms |
title_sort |
impacts of ocean acidification on temperate benthic calcifying organisms |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://theses.hal.science/tel-00925830 https://theses.hal.science/tel-00925830/document https://theses.hal.science/tel-00925830/file/These_F.Noisette_2013.12.11.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
https://theses.hal.science/tel-00925830 Ecologie, Environnement. Université Pierre et Marie Curie - Paris VI, 2013. Français. ⟨NNT : ⟩ |
op_relation |
tel-00925830 https://theses.hal.science/tel-00925830 https://theses.hal.science/tel-00925830/document https://theses.hal.science/tel-00925830/file/These_F.Noisette_2013.12.11.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1768372536021614592 |