Canesi_2024_Porites' coral calcifying fluid chemistry regulation under normal- and low-pH seawater conditions in Palau Archipelago Impacts on growth properties.pdf
[en] 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.
Disciplines :
Aquatic sciences & oceanology Chemistry
Author, co-author :
Canesi, Marine; 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. Electronic address: marine.canesi@gmail.com
Douville, Éric; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
Bordier, Louise; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
Dapoigny, Arnaud; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
Coulibaly, Gninwoyo Eric; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 911 91 Gif-sur-Yvette, France
Montagna, Paolo; 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
Béraud, Éric; 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
Allemand, Denis; 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
Planes, Serge; Laboratoire d'Excellence "CORAIL", PSL Research University: EPHE-UPVD-CNRS, USR 3278 CRIOBE, Université de Perpignan, 66100 Perpignan, France
Furla, Paola; 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
Gilson, Eric; 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
Roberty, Stéphane ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecophysiologie et physiologie animale
Zoccola, Didier; 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
Reynaud, Stéphanie; 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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