Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent
Corals exert a strong biological control over their calcification processes, but there is a lack of knowledge on their capability of long-term acclimatization to ocean acidification (OA). We used a dual geochemical proxy approach to estimate the calcifying fluid pH (pHcf) and carbonate chemistry of...
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ftdoajarticles:oai:doaj.org/article:cbbf77c86a5144b4a2792711c4bc1a86 2023-05-15T17:51:06+02:00 Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent Marlene Wall Fiorella Prada Jan Fietzke Erik Caroselli Zvy Dubinsky Leonardo Brizi Paola Fantazzini Silvia Franzellitti Tali Mass Paolo Montagna Giuseppe Falini Stefano Goffredo 2019-11-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00699 https://doaj.org/article/cbbf77c86a5144b4a2792711c4bc1a86 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00699/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00699 https://doaj.org/article/cbbf77c86a5144b4a2792711c4bc1a86 Frontiers in Marine Science, Vol 6 (2019) pH up-regulation ocean acidification Balanophyllia europaea Mediterranean Sea boron calcifying fluid Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00699 2022-12-31T01:28:04Z Corals exert a strong biological control over their calcification processes, but there is a lack of knowledge on their capability of long-term acclimatization to ocean acidification (OA). We used a dual geochemical proxy approach to estimate the calcifying fluid pH (pHcf) and carbonate chemistry of a Mediterranean coral (Balanophyllia europaea) naturally growing along a pH gradient (range: pHTS 8.07–7.74). The pHcf derived from skeletal boron isotopic composition (δ11B) was 0.3–0.6 units above seawater values and homogeneous along the gradient (mean ± SEM: Site 1 = 8.39 ± 0.03, Site 2 = 8.34 ± 0.03, Site 3 = 8.34 ± 0.02). Also carbonate ion concentration derived from B/Ca was homogeneous [mean ± SEM (μmol kg–1): Site 1 = 579 ± 34, Site 2 = 541 ± 27, Site 3 = 568 ± 30] regardless of seawater pH. Furthermore, gross calcification rate (GCR, mass of CaCO3 deposited on the skeletal unit area per unit of time), estimated by a “bio-inorganic model” (IpHRAC), was homogeneous with decreasing pH. The homogeneous GCR, internal pH and carbonate chemistry confirm that the features of the “building blocks” – the fundamental structural components – produced by the biomineralization process were substantially unaffected by increased acidification. Furthermore, the pH up-regulation observed in this study could potentially explain the previous hypothesis that less “building blocks” are produced with increasing acidification ultimately leading to increased skeletal porosity and to reduced net calcification rate computed by including the total volume of the pore space. In fact, assuming that the available energy at the three sites is the same, this energy at the low pH sites could be partitioned among fewer calicoblastic cells that consume more energy given the larger difference between external and internal pH compared to the control, leading to the production of less building blocks (i.e., formation of pores inside the skeleton structure, determining increased porosity). However, we cannot exclude that also dissolution may play a ... Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 6 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
pH up-regulation ocean acidification Balanophyllia europaea Mediterranean Sea boron calcifying fluid Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
pH up-regulation ocean acidification Balanophyllia europaea Mediterranean Sea boron calcifying fluid Science Q General. Including nature conservation geographical distribution QH1-199.5 Marlene Wall Fiorella Prada Jan Fietzke Erik Caroselli Zvy Dubinsky Leonardo Brizi Paola Fantazzini Silvia Franzellitti Tali Mass Paolo Montagna Giuseppe Falini Stefano Goffredo Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
topic_facet |
pH up-regulation ocean acidification Balanophyllia europaea Mediterranean Sea boron calcifying fluid Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Corals exert a strong biological control over their calcification processes, but there is a lack of knowledge on their capability of long-term acclimatization to ocean acidification (OA). We used a dual geochemical proxy approach to estimate the calcifying fluid pH (pHcf) and carbonate chemistry of a Mediterranean coral (Balanophyllia europaea) naturally growing along a pH gradient (range: pHTS 8.07–7.74). The pHcf derived from skeletal boron isotopic composition (δ11B) was 0.3–0.6 units above seawater values and homogeneous along the gradient (mean ± SEM: Site 1 = 8.39 ± 0.03, Site 2 = 8.34 ± 0.03, Site 3 = 8.34 ± 0.02). Also carbonate ion concentration derived from B/Ca was homogeneous [mean ± SEM (μmol kg–1): Site 1 = 579 ± 34, Site 2 = 541 ± 27, Site 3 = 568 ± 30] regardless of seawater pH. Furthermore, gross calcification rate (GCR, mass of CaCO3 deposited on the skeletal unit area per unit of time), estimated by a “bio-inorganic model” (IpHRAC), was homogeneous with decreasing pH. The homogeneous GCR, internal pH and carbonate chemistry confirm that the features of the “building blocks” – the fundamental structural components – produced by the biomineralization process were substantially unaffected by increased acidification. Furthermore, the pH up-regulation observed in this study could potentially explain the previous hypothesis that less “building blocks” are produced with increasing acidification ultimately leading to increased skeletal porosity and to reduced net calcification rate computed by including the total volume of the pore space. In fact, assuming that the available energy at the three sites is the same, this energy at the low pH sites could be partitioned among fewer calicoblastic cells that consume more energy given the larger difference between external and internal pH compared to the control, leading to the production of less building blocks (i.e., formation of pores inside the skeleton structure, determining increased porosity). However, we cannot exclude that also dissolution may play a ... |
format |
Article in Journal/Newspaper |
author |
Marlene Wall Fiorella Prada Jan Fietzke Erik Caroselli Zvy Dubinsky Leonardo Brizi Paola Fantazzini Silvia Franzellitti Tali Mass Paolo Montagna Giuseppe Falini Stefano Goffredo |
author_facet |
Marlene Wall Fiorella Prada Jan Fietzke Erik Caroselli Zvy Dubinsky Leonardo Brizi Paola Fantazzini Silvia Franzellitti Tali Mass Paolo Montagna Giuseppe Falini Stefano Goffredo |
author_sort |
Marlene Wall |
title |
Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
title_short |
Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
title_full |
Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
title_fullStr |
Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
title_full_unstemmed |
Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent |
title_sort |
linking internal carbonate chemistry regulation and calcification in corals growing at a mediterranean co2 vent |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00699 https://doaj.org/article/cbbf77c86a5144b4a2792711c4bc1a86 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00699/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00699 https://doaj.org/article/cbbf77c86a5144b4a2792711c4bc1a86 |
op_doi |
https://doi.org/10.3389/fmars.2019.00699 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1766158127846129664 |