More than local adaptation: High diversity of response to seawater acidification in seven coral species from the same assemblage in French Polynesia

Type : ACL
Nature : Production scientifique
Au bénéfice du Laboratoire : Oui
Statut de publication : Publié
Année de publication : 2021
Auteurs (8) : GODEFROID Mathilde ARÇUBY Robin LACUBE Yann ESPIAU Benoît DUPONT Sam GAZEAU Frederic METIAN M HÉDOUIN Laetitia
Revue scientifique : Journal of The Marine Biological Association of The United Kingdom
Volume : 1
Fascicule :
Pages : 1-9
DOI : 10.1017/S0025315421000618
URL : -
Abstract : Responses of corals to seawater acidification have been extensively studied. Sensitivity varies widely between species, highlighting the need to avoid extrapolation from one to another to get an accurate understanding of coral community responses. We tested the responses of seven coral species (Acropora cytherea, Acropora hyacinthus, Acropora pulchra, Leptastrea pruinosa, Montipora grisea, Pavona cactus, Pocillopora verrucosa) from the Mo'orea lagoon to a 48-day exposure to three pH scenarios (pH 7.95, 7.7 and 7.3). Tissue necrosis, mortality, growth rates, photophysiological performances and colour index were recorded. Few significant differences were noted between pH 7.95 and 7.7, but species-specific responses were observed at pH 7.3. While our data do not allow identification of the mechanisms behind this diversity in response between species inhabiting the same environment, it can exclude several hypotheses such as local adaptation, skeletal type, corallum morphology or calcification rate as sole factors determining coral sensitivity to pH.
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Citation :
Godefroid M, Arçuby R, Lacube Y, Espiau B, Dupont S, Gazeau F, Metian M, Hédouin L (2021) More than local adaptation: High diversity of response to seawater acidification in seven coral species from the same assemblage in French Polynesia. J Mar Biol Assoc Uk 1: 1-9 | doi: 10.1017/S0025315421000618