The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers
This study used an interdisciplinary approach to assess the effects of ocean acidification on Mediterranean pteropods and foraminifers. A comparison of museum and modern samples of two pteropod species investigated the effects of pH on shell properties. Pteropod populations were analysed using time...
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Format: | Doctoral or Postdoctoral Thesis |
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Online Access: | https://tel.archives-ouvertes.fr/tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368/document https://tel.archives-ouvertes.fr/tel-01127368/file/2014PA066346.pdf |
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ftccsdartic:oai:HAL:tel-01127368v1 2023-05-15T17:50:30+02:00 The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers Les effets de l'acidification des océans sur le potentiel de calcification et l'intégration des éléments et des isotopes dans les ptéropodes méditerranéens et les foraminifères Howes, Ella Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 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 VI School of Engineering and Science (Brême) Jelle Bijma Jean-Pierre Gattuso 2014-06-05 https://tel.archives-ouvertes.fr/tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368/document https://tel.archives-ouvertes.fr/tel-01127368/file/2014PA066346.pdf en eng HAL CCSD NNT: 2014PA066346 tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368/document https://tel.archives-ouvertes.fr/tel-01127368/file/2014PA066346.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-01127368 Earth Sciences. Université Pierre et Marie Curie - Paris VI; School of Engineering and Science (Brême), 2014. English. ⟨NNT : 2014PA066346⟩ Ocean acidification Global change Acidification des océans Changement global Thécosome ptéropode Foraminifères planctoniques Méditerranée Interdisciplinaire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2014 ftccsdartic 2021-11-21T03:13:11Z This study used an interdisciplinary approach to assess the effects of ocean acidification on Mediterranean pteropods and foraminifers. A comparison of museum and modern samples of two pteropod species investigated the effects of pH on shell properties. Pteropod populations were analysed using time series data. To improve future perturbation experiments, a collaborative review of pteropod culture techniques was produced. Finally, the foraminifer O. universa was cultured under decoupled pH and [CO32-] to assess the effects of changes in the carbonate chemistry on boron incorporation and isotope fractionation. Museum pteropod samples were thicker than shells from 2012 and C. inflexa shells collected in 1910 were significantly denser than those from 2012, possibly due to a pH effect. Pteropod abundances displayed an increasing trend between 1967-2003 and are influenced by inter- annual temperature changes, with no sign of the observed changes in shell properties having had negative impacts. pH was the sole parameter of the carbonate system that affected the δ11B of O. universa calcite. The B/Ca ratio decreased with decreasing [CO32-] at constant pH but did not show consistent trends at constant [CO32-] and varying pH. Instead, a close correlation of B/Ca ratios and [HCO3-] was observed suggesting that boron is controlled by the [HCO3-]. Cette étude a utilisé une approche interdisciplinaire pour évaluer les effets de l'acidification de l'océan sur des ptéropodes et les foraminifères Méditerranéennes. Une comparaison d'échantillons conservés et modernes de 2 espèces de ptéropodes a été réalisée pour étudier les effets du pH sur les propriétés de la coquille. Des populations de ptéropodes ont également été analysées à l'aide des données de séries temporelles. Pour permettre l'amélioration de futures expériences de perturbation, une revue collaborative des techniques de culture de ptéropodes a été produite. Enfin, le foraminifère O. universa a été cultivé dans des conditions de pH et de [CO32-] découplés pour évaluer ... Doctoral or Postdoctoral Thesis Ocean acidification Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Ocean acidification Global change Acidification des océans Changement global Thécosome ptéropode Foraminifères planctoniques Méditerranée Interdisciplinaire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Ocean acidification Global change Acidification des océans Changement global Thécosome ptéropode Foraminifères planctoniques Méditerranée Interdisciplinaire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Howes, Ella The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
topic_facet |
Ocean acidification Global change Acidification des océans Changement global Thécosome ptéropode Foraminifères planctoniques Méditerranée Interdisciplinaire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
This study used an interdisciplinary approach to assess the effects of ocean acidification on Mediterranean pteropods and foraminifers. A comparison of museum and modern samples of two pteropod species investigated the effects of pH on shell properties. Pteropod populations were analysed using time series data. To improve future perturbation experiments, a collaborative review of pteropod culture techniques was produced. Finally, the foraminifer O. universa was cultured under decoupled pH and [CO32-] to assess the effects of changes in the carbonate chemistry on boron incorporation and isotope fractionation. Museum pteropod samples were thicker than shells from 2012 and C. inflexa shells collected in 1910 were significantly denser than those from 2012, possibly due to a pH effect. Pteropod abundances displayed an increasing trend between 1967-2003 and are influenced by inter- annual temperature changes, with no sign of the observed changes in shell properties having had negative impacts. pH was the sole parameter of the carbonate system that affected the δ11B of O. universa calcite. The B/Ca ratio decreased with decreasing [CO32-] at constant pH but did not show consistent trends at constant [CO32-] and varying pH. Instead, a close correlation of B/Ca ratios and [HCO3-] was observed suggesting that boron is controlled by the [HCO3-]. Cette étude a utilisé une approche interdisciplinaire pour évaluer les effets de l'acidification de l'océan sur des ptéropodes et les foraminifères Méditerranéennes. Une comparaison d'échantillons conservés et modernes de 2 espèces de ptéropodes a été réalisée pour étudier les effets du pH sur les propriétés de la coquille. Des populations de ptéropodes ont également été analysées à l'aide des données de séries temporelles. Pour permettre l'amélioration de futures expériences de perturbation, une revue collaborative des techniques de culture de ptéropodes a été produite. Enfin, le foraminifère O. universa a été cultivé dans des conditions de pH et de [CO32-] découplés pour évaluer ... |
author2 |
Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 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 VI School of Engineering and Science (Brême) Jelle Bijma Jean-Pierre Gattuso |
format |
Doctoral or Postdoctoral Thesis |
author |
Howes, Ella |
author_facet |
Howes, Ella |
author_sort |
Howes, Ella |
title |
The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
title_short |
The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
title_full |
The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
title_fullStr |
The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
title_full_unstemmed |
The effects of ocean acidification on calcification and incorporation of isotopes in Mediterranean pteropods and foraminifers |
title_sort |
effects of ocean acidification on calcification and incorporation of isotopes in mediterranean pteropods and foraminifers |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://tel.archives-ouvertes.fr/tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368/document https://tel.archives-ouvertes.fr/tel-01127368/file/2014PA066346.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
https://tel.archives-ouvertes.fr/tel-01127368 Earth Sciences. Université Pierre et Marie Curie - Paris VI; School of Engineering and Science (Brême), 2014. English. ⟨NNT : 2014PA066346⟩ |
op_relation |
NNT: 2014PA066346 tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368 https://tel.archives-ouvertes.fr/tel-01127368/document https://tel.archives-ouvertes.fr/tel-01127368/file/2014PA066346.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766157277512859648 |