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Canesi M, Douville É, Bordier L, Dapoigny A, Coulibaly GE, Montagna P, Béraud É, Allemand D, Planes S, Furla P, Gilson E, Roberty S, Zoccola D, Reynaud S. Porites' coral calcifying fluid chemistry regulation under normal- and low-pH seawater conditions in Palau Archipelago: Impacts on growth properties. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 911:168552. [PMID: 38007109 DOI: 10.1016/j.scitotenv.2023.168552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 11/07/2023] [Accepted: 11/11/2023] [Indexed: 11/27/2023]
Abstract
Ongoing ocean acidification is known to be a major threat to tropical coral reefs. To date, only few studies have evaluated the impacts of natural long-term exposure to low-pH seawater on the chemical regulation and growth of reef-building corals. This work investigated the different responses of the massive Porites coral living at normal (pHsw ~ 8.03) and naturally low-pH (pHsw ~ 7.85) seawater conditions at Palau over the last decades. Our results show that both Porites colonies maintained similar carbonate properties (pHcf, [CO32-]cf, DICcf, and Ωcf) within their calcifying fluid since 1972. However, the Porites skeleton of the more acidified conditions revealed a significantly lower density (~ 1.21 ± 0.09 g·cm-3) than the skeleton from the open-ocean site (~ 1.41 ± 0.07 g·cm-3). Overall, both Porites colonies exerted a strong biological control to maintain stable calcifying fluid carbonate chemistry that favored the calcification process, especially under low-pH conditions. However, the decline in skeletal density observed at low pH provides critical insights into Porites vulnerability to future global change.
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Affiliation(s)
- Marine Canesi
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France; Centre Scientifique de Monaco, 8 Quai Antoine Ier, 98000 Monaco, Principality of Monaco, Monaco; LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco.
| | - Éric Douville
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
| | - Louise Bordier
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
| | - Arnaud Dapoigny
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
| | - Gninwoyo Eric Coulibaly
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
| | - Paolo Montagna
- Istituto di Scienze Polari (ISP), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna, Italy; National Biodiversity Future Center S.c.a.r.l., Piazza Marina 61, Palermo, Italy
| | - Éric Béraud
- Centre Scientifique de Monaco, 8 Quai Antoine Ier, 98000 Monaco, Principality of Monaco, Monaco; LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco
| | - Denis Allemand
- Centre Scientifique de Monaco, 8 Quai Antoine Ier, 98000 Monaco, Principality of Monaco, Monaco; LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco
| | - Serge Planes
- Laboratoire d'Excellence "CORAIL", PSL Research University: EPHE-UPVD-CNRS, USR 3278 CRIOBE, Université de Perpignan, 66100 Perpignan, France
| | - Paola Furla
- LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco; Université Côte d'Azur, CNRS, INSERM, Institute for Research on Cancer and Aging, Nice (IRCAN), Nice, France; Université Côte d'Azur, Institut Fédératif de Recherche - Ressources Marines (IFR MARRES), Nice, France
| | - Eric Gilson
- LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco; Université Côte d'Azur, CNRS, INSERM, Institute for Research on Cancer and Aging, Nice (IRCAN), Nice, France; Université Côte d'Azur, Institut Fédératif de Recherche - Ressources Marines (IFR MARRES), Nice, France; Department of Medical Genetics, CHU, Nice, France
| | - Stephane Roberty
- InBioS - Animal Physiology and Ecophysiology, Department of Biology, Ecology & Evolution, University of Liège, Liège, Belgium
| | - Didier Zoccola
- Centre Scientifique de Monaco, 8 Quai Antoine Ier, 98000 Monaco, Principality of Monaco, Monaco; LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco
| | - Stéphanie Reynaud
- Centre Scientifique de Monaco, 8 Quai Antoine Ier, 98000 Monaco, Principality of Monaco, Monaco; LIA ROPSE, Laboratoire International Associé Université Côte d'Azur - Centre Scientifique de Monaco, Monaco
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Willard HF, Deutekom ES, Allemand D, Tambutté S, Kaandorp JA. Testing hypotheses on the calcification in scleractinian corals using a spatio-temporal model that shows a high degree of robustness. J Theor Biol 2023; 561:111382. [PMID: 36610694 DOI: 10.1016/j.jtbi.2022.111382] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 01/06/2023]
Abstract
Calcification in photosynthetic scleractinian corals is a complicated process that involves many different biological, chemical, and physical sub-processes that happen within and around the coral tissue. Identifying and quantifying the role of separate processes in vivo or in vitro is difficult or not possible. A computational model can facilitate this research by simulating the sub-processes independently. This study presents a spatio-temporal model of the calcification physiology, which is based on processes that are considered essential for calcification: respiration, photosynthesis, Ca2+-ATPase, carbonic anhydrase. The model is used to test different hypotheses considering ion transport across the calicoblastic cells and Light Enhanced Calcification (LEC). It is also used to quantify the effect of ocean acidification (OA) on the Extracellular Calcifying Medium (ECM) and ATP-consumption of Ca2+-ATPase. It was able to reproduce the experimental data of three separate studies and finds that paracellular transport plays a minor role compared to transcellular transport. In the model, LEC results from increased Ca2+-ATPase activity in combination with increased metabolism. Implementing OA increases the concentration of CO2 throughout the entire tissue, thereby increasing the availability of CO3- in the ECM. As a result, the model finds that calcification becomes more energy-demanding and the calcification rate increases.
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Affiliation(s)
- Helena F Willard
- Computational Science Lab, Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands
| | - Eva S Deutekom
- Computational Science Lab, Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands
| | - Denis Allemand
- Centre Scientifique de Monaco, Avenue Saint Martin, 98000, Monaco
| | - Sylvie Tambutté
- Centre Scientifique de Monaco, Avenue Saint Martin, 98000, Monaco
| | - Jaap A Kaandorp
- Computational Science Lab, Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands.
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Godefroid M, Dupont S, Metian M, Hédouin L. Two decades of seawater acidification experiments on tropical scleractinian corals: Overview, meta-analysis and perspectives. MARINE POLLUTION BULLETIN 2022; 178:113552. [PMID: 35339865 DOI: 10.1016/j.marpolbul.2022.113552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/03/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Ocean acidification has emerged as a major concern in the last fifteen years and studies on the impacts of seawater acidification on marine organisms have multiplied accordingly. This review aimed at synthesizing the literature on the effects of seawater acidification on tropical scleractinians under laboratory-controlled conditions. We identified 141 articles (published between 1999 and 2021) and separated endpoints into 22 biological categories to identify global trends for mitigation and gaps in knowledge and research priorities for future investigators. The relative number of affected endpoints increased with pH intensity (particularly for endpoints associated to calcification and reproduction). When exposed to pH 7.6-7.8 (compared to higher pH), 49% of endpoints were affected. The diversity in experimental designs prevented deciphering the modulating role of coral life stages, genera or duration of exposure. Finally, important bias in research efforts included most experiments on adult corals (68.5%), in 27 out of 150 (18%) coral ecoregions and exclusively from shallow-waters.
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Affiliation(s)
- Mathilde Godefroid
- PSL Research University: EPHE-CNRS-UPVD, USR 3278 CRIOBE, BP 1013, 98729 Papetoai, Mo'orea, French Polynesia; Laboratoire d'Excellence "CORAIL", Mo'orea, French Polynesia.
| | - Sam Dupont
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg Marine Research Station, Kristineberg 566, 45178 Fiskebäckskil, Sweden; Radioecology Laboratory International Atomic Energy Agency (IAEA), Marine Laboratories, 4 Quai Antoine 1er, 98000, Monaco
| | - Marc Metian
- Radioecology Laboratory International Atomic Energy Agency (IAEA), Marine Laboratories, 4 Quai Antoine 1er, 98000, Monaco
| | - Laetitia Hédouin
- PSL Research University: EPHE-CNRS-UPVD, USR 3278 CRIOBE, BP 1013, 98729 Papetoai, Mo'orea, French Polynesia; Laboratoire d'Excellence "CORAIL", Mo'orea, French Polynesia
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Comeau S, Cornwall CE, Shlesinger T, Hoogenboom M, Mana R, McCulloch MT, Rodolfo-Metalpa R. pH variability at volcanic CO 2 seeps regulates coral calcifying fluid chemistry. GLOBAL CHANGE BIOLOGY 2022; 28:2751-2763. [PMID: 35119159 DOI: 10.1111/gcb.16093] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Coral reefs are iconic ecosystems with immense ecological, economic and cultural value, but globally their carbonate-based skeletal construction is threatened by ocean acidification (OA). Identifying coral species that have specialised mechanisms to maintain high rates of calcification in the face of declining seawater pH is of paramount importance in predicting future species composition, and growth of coral reefs. Here, we studied multiple coral species from two distinct volcanic CO2 seeps in Papua New Guinea to assess their capacity to control their calcifying fluid (CF) chemistry. Several coral species living under conditions of low mean seawater pH, but with either low or high variability in seawater pH, were examined and compared with those living in 'normal' (non-seep) ambient seawater pH. We show that when mean seawater pH is low but highly variable, corals have a greater ability to maintain constant pHcf in their CF, but this characteristic was not linked with changes in abundance. Within less variable low pH seawater, corals with limited reductions in pHcf at the seep sites compared with controls tended to be more abundant at the seep site than at the control site. However, this finding was strongly influenced by a single species (Montipora foliosa), which was able to maintain complete pHcf homeostasis. Overall, although our findings indicate that there might be an association between ecological success and greater pHcf homeostasis, further research with additional species and at more sites with differing seawater pH regimes is required to solidify inferences regarding coral ecological success under future OA.
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Affiliation(s)
- Steeve Comeau
- CNRS-INSU, Laboratoire d'Océanographie de Villefranche, Sorbonne Université, Villefranche- sur-mer, France
- ARC Centre of Excellence for Coral Reef Studies and Ocean Graduate School, The University of Western Australia, Crawley, Western Australia, Australia
| | - Christopher E Cornwall
- ARC Centre of Excellence for Coral Reef Studies and Ocean Graduate School, The University of Western Australia, Crawley, Western Australia, Australia
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Tom Shlesinger
- Institute for Global Ecology, Florida Institute of Technology, Melbourne, Florida, USA
| | - Mia Hoogenboom
- ARC Centre of Excellence for Coral Reef Studies and College of Science and Engineering, James Cook University, Townsville, Queensland, Australia
| | - Ralph Mana
- School of Natural and Physical Sciences, University of Papua New Guinea, Port Moresby, National Capital District, Papua New Guinea
| | - Malcolm T McCulloch
- ARC Centre of Excellence for Coral Reef Studies and Ocean Graduate School, The University of Western Australia, Crawley, Western Australia, Australia
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Fietzke J, Wall M. Distinct fine-scale variations in calcification control revealed by high-resolution 2D boron laser images in the cold-water coral Lophelia pertusa. SCIENCE ADVANCES 2022; 8:eabj4172. [PMID: 35302850 PMCID: PMC8932653 DOI: 10.1126/sciadv.abj4172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 01/26/2022] [Indexed: 05/18/2023]
Abstract
Coral calcification is a complex biologically controlled process of hard skeleton formation, and it is influenced by environmental conditions. The chemical composition of coral skeletons responds to calcification conditions and can be used to gain insights into both the control asserted by the organism and the environment. Boron and its isotopic composition have been of particular interest because of links to carbon chemistry and pH. In this study, we acquired high-resolution boron images (concentration and isotopes) in a skeleton sample of the azooxanthellate cold-water coral Lophelia pertusa. We observed high boron variability at a small spatial scale related to skeletal structure. This implies differences in calcification control during different stages of skeleton formation. Our data point to bicarbonate active transport as a critical pathway during early skeletal growth, and the variable activity rates explain the majority of the observed boron systematic.
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Affiliation(s)
- Jan Fietzke
- GEOMAR Helmholtz Center for Ocean Research Kiel, Wischhofstr. 1-3, 24148 Kiel, Germany
- Corresponding author.
| | - Marlene Wall
- GEOMAR Helmholtz Center for Ocean Research Kiel, Wischhofstr. 1-3, 24148 Kiel, Germany
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany
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