Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification
International audience Natural variability in pH in the diffusive boundary layer (DBL), the discrete layer of seawater between bulk seawater and the outer surface of organisms, could be an important factor determining the response of corals and coralline algae to ocean acidification (OA). Here, two...
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ftccsdartic:oai:HAL:hal-02297095v1 2023-05-15T17:50:56+02:00 Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification Comeau, S. Cornwall, C. Pupier, C. DeCarlo, T. Alessi, C. Trehern, R. McCulloch, T. The University of Western Australia (UWA) 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) Victoria University of Wellington Centre Scientifique de Monaco (CSM) 2019 https://hal.sorbonne-universite.fr/hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095/document https://hal.sorbonne-universite.fr/hal-02297095/file/s41598-019-49044-w.pdf https://doi.org/10.1038/s41598-019-49044-w en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-49044-w hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095/document https://hal.sorbonne-universite.fr/hal-02297095/file/s41598-019-49044-w.pdf doi:10.1038/s41598-019-49044-w info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.sorbonne-universite.fr/hal-02297095 Scientific Reports, Nature Publishing Group, 2019, 9, pp.12829. ⟨10.1038/s41598-019-49044-w⟩ Environmental impact Marine biology Climate-change ecology [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1038/s41598-019-49044-w 2021-12-05T02:01:03Z International audience Natural variability in pH in the diffusive boundary layer (DBL), the discrete layer of seawater between bulk seawater and the outer surface of organisms, could be an important factor determining the response of corals and coralline algae to ocean acidification (OA). Here, two corals with different morphologies and one coralline alga were maintained under two different regimes of flow velocities, pH, and light intensities in a 12 flumes experimental system for a period of 27 weeks. We used a combination of geochemical proxies, physiological and micro-probe measurements to assess how these treatments affected the conditions in the DBL and the response of organisms to OA. Overall, low flow velocity did not ameliorate the negative effect of low pH and therefore did not provide a refugia from OA. Flow velocity had species-specific effects with positive effects on calcification for two species. pH in the calcifying fluid (pHcf) was reduced by low flow in both corals at low light only. pHcf was significantly impacted by pH in the DBL for the two species capable of significantly modifying pH in the DBL. The dissolved inorganic carbon in the calcifying fluid (DICcf) was highest under low pH for the corals and low flow for the coralline, while the saturation state in the calcifying fluid and its proxy (FWHM) were generally not affected by the treatments. This study therefore demonstrates that the effects of OA will manifest most severely in a combination of lower light and lower flow habitats for sub-tropical coralline algae. These effects will also be greatest in lower flow habitats for some corals. Together with existing literature, these findings reinforce that the effects of OA are highly context dependent, and will differ greatly between habitats, and depending on species composition. Article in Journal/Newspaper Ocean acidification Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Scientific Reports 9 1 |
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 |
Environmental impact Marine biology Climate-change ecology [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Environmental impact Marine biology Climate-change ecology [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Comeau, S. Cornwall, C. Pupier, C. DeCarlo, T. Alessi, C. Trehern, R. McCulloch, T. Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
topic_facet |
Environmental impact Marine biology Climate-change ecology [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Natural variability in pH in the diffusive boundary layer (DBL), the discrete layer of seawater between bulk seawater and the outer surface of organisms, could be an important factor determining the response of corals and coralline algae to ocean acidification (OA). Here, two corals with different morphologies and one coralline alga were maintained under two different regimes of flow velocities, pH, and light intensities in a 12 flumes experimental system for a period of 27 weeks. We used a combination of geochemical proxies, physiological and micro-probe measurements to assess how these treatments affected the conditions in the DBL and the response of organisms to OA. Overall, low flow velocity did not ameliorate the negative effect of low pH and therefore did not provide a refugia from OA. Flow velocity had species-specific effects with positive effects on calcification for two species. pH in the calcifying fluid (pHcf) was reduced by low flow in both corals at low light only. pHcf was significantly impacted by pH in the DBL for the two species capable of significantly modifying pH in the DBL. The dissolved inorganic carbon in the calcifying fluid (DICcf) was highest under low pH for the corals and low flow for the coralline, while the saturation state in the calcifying fluid and its proxy (FWHM) were generally not affected by the treatments. This study therefore demonstrates that the effects of OA will manifest most severely in a combination of lower light and lower flow habitats for sub-tropical coralline algae. These effects will also be greatest in lower flow habitats for some corals. Together with existing literature, these findings reinforce that the effects of OA are highly context dependent, and will differ greatly between habitats, and depending on species composition. |
author2 |
The University of Western Australia (UWA) 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) Victoria University of Wellington Centre Scientifique de Monaco (CSM) |
format |
Article in Journal/Newspaper |
author |
Comeau, S. Cornwall, C. Pupier, C. DeCarlo, T. Alessi, C. Trehern, R. McCulloch, T. |
author_facet |
Comeau, S. Cornwall, C. Pupier, C. DeCarlo, T. Alessi, C. Trehern, R. McCulloch, T. |
author_sort |
Comeau, S. |
title |
Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
title_short |
Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
title_full |
Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
title_fullStr |
Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
title_full_unstemmed |
Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification |
title_sort |
flow-driven micro-scale ph variability affects the physiology of corals and coralline algae under ocean acidification |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.sorbonne-universite.fr/hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095/document https://hal.sorbonne-universite.fr/hal-02297095/file/s41598-019-49044-w.pdf https://doi.org/10.1038/s41598-019-49044-w |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.sorbonne-universite.fr/hal-02297095 Scientific Reports, Nature Publishing Group, 2019, 9, pp.12829. ⟨10.1038/s41598-019-49044-w⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-49044-w hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095 https://hal.sorbonne-universite.fr/hal-02297095/document https://hal.sorbonne-universite.fr/hal-02297095/file/s41598-019-49044-w.pdf doi:10.1038/s41598-019-49044-w |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-019-49044-w |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
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1766157876188938240 |