Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults
International audience Volcanic CO2 vents are ideal sites to study the long-term effects of ocean acidification on long- lived calcified species, such as corals. At the Island of Ischia (Italy), we investigated, both in situ and ex situ, whether past exposure to low pH confers physiological toleranc...
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ftccsdartic:oai:HAL:hal-03979440v1 2023-05-15T17:50:07+02:00 Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults Carbonne, Chloe Comeau, Steeve Moore, Billy Plichon, Keyla Mirasole, Alice Gutierrez, Thomas Gattuso, Jean-Pierre Teixidó, Núria Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) The University of Western Australia (UWA) University of Essex Université Côte d'Azur (UCA) Stazione Zoologica Anton Dohrn (SZN) Sorbonne Université (SU) Hopkins Marine Station Stanford Stanford University Lima, Chile 2022-09-07 https://hal.science/hal-03979440 en eng HAL CCSD hal-03979440 https://hal.science/hal-03979440 The 5th international Symposium on the ocean in a High CO2 World https://hal.science/hal-03979440 The 5th international Symposium on the ocean in a High CO2 World, Sep 2022, Lima, Chile https://www.highco2-lima.org/ [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2022 ftccsdartic 2023-03-19T02:33:49Z International audience Volcanic CO2 vents are ideal sites to study the long-term effects of ocean acidification on long- lived calcified species, such as corals. At the Island of Ischia (Italy), we investigated, both in situ and ex situ, whether past exposure to low pH confers physiological tolerance to ocean acidification in different life stages and affects sexual reproduction. Adult colonies of Astroides calycularis (azooxanthellate) and Cladocora caespitosa zooxanthellate), and larvae of A. calycularis were sampled at CO2 vent and ambient pH sites. They were then maintained under controlled conditionsin the laboratory, during two distinct 6-month experiments, under ambient (pHT 8.0), low (pHT 7.7) and extreme low pH (pHT 7.5, only for larvae from CO2 vents). Adult net calcification and respiration of both species, and net and gross photosynthesis of C. caespitosa were unaffected by the pH treatments regardless of their environmental history. Larvae of A. calycularis from the CO2 vents were smaller and had a lower survivorship and settlement success than larvae from the ambient pH site regardless of experimental pH treatment. Colonies of C. caespitosa were smaller and less abundant near CO2 vents. Histological sections of C. caespitosa from the vents demonstrated an asynchrony of spawning between male and female, which could have major effects on fertilization. Our results suggest that adult colonies of A. calycularis and C. caespitosa exhibit tolerance to acidification. However, long exposition to low pH appears to decrease sexual reproduction and early life stages development, which are both of particular relevance for the persistence of healthy populations. Conference Object Ocean acidification Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Carbonne, Chloe Comeau, Steeve Moore, Billy Plichon, Keyla Mirasole, Alice Gutierrez, Thomas Gattuso, Jean-Pierre Teixidó, Núria Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Volcanic CO2 vents are ideal sites to study the long-term effects of ocean acidification on long- lived calcified species, such as corals. At the Island of Ischia (Italy), we investigated, both in situ and ex situ, whether past exposure to low pH confers physiological tolerance to ocean acidification in different life stages and affects sexual reproduction. Adult colonies of Astroides calycularis (azooxanthellate) and Cladocora caespitosa zooxanthellate), and larvae of A. calycularis were sampled at CO2 vent and ambient pH sites. They were then maintained under controlled conditionsin the laboratory, during two distinct 6-month experiments, under ambient (pHT 8.0), low (pHT 7.7) and extreme low pH (pHT 7.5, only for larvae from CO2 vents). Adult net calcification and respiration of both species, and net and gross photosynthesis of C. caespitosa were unaffected by the pH treatments regardless of their environmental history. Larvae of A. calycularis from the CO2 vents were smaller and had a lower survivorship and settlement success than larvae from the ambient pH site regardless of experimental pH treatment. Colonies of C. caespitosa were smaller and less abundant near CO2 vents. Histological sections of C. caespitosa from the vents demonstrated an asynchrony of spawning between male and female, which could have major effects on fertilization. Our results suggest that adult colonies of A. calycularis and C. caespitosa exhibit tolerance to acidification. However, long exposition to low pH appears to decrease sexual reproduction and early life stages development, which are both of particular relevance for the persistence of healthy populations. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) The University of Western Australia (UWA) University of Essex Université Côte d'Azur (UCA) Stazione Zoologica Anton Dohrn (SZN) Sorbonne Université (SU) Hopkins Marine Station Stanford Stanford University |
format |
Conference Object |
author |
Carbonne, Chloe Comeau, Steeve Moore, Billy Plichon, Keyla Mirasole, Alice Gutierrez, Thomas Gattuso, Jean-Pierre Teixidó, Núria |
author_facet |
Carbonne, Chloe Comeau, Steeve Moore, Billy Plichon, Keyla Mirasole, Alice Gutierrez, Thomas Gattuso, Jean-Pierre Teixidó, Núria |
author_sort |
Carbonne, Chloe |
title |
Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
title_short |
Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
title_full |
Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
title_fullStr |
Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
title_full_unstemmed |
Early life stages of Mediterranean corals are more sensitive to ocean acidification than adults |
title_sort |
early life stages of mediterranean corals are more sensitive to ocean acidification than adults |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03979440 |
op_coverage |
Lima, Chile |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
The 5th international Symposium on the ocean in a High CO2 World https://hal.science/hal-03979440 The 5th international Symposium on the ocean in a High CO2 World, Sep 2022, Lima, Chile https://www.highco2-lima.org/ |
op_relation |
hal-03979440 https://hal.science/hal-03979440 |
_version_ |
1766156731496267776 |