Revisiting tolerance to ocean acidification: insights from a new framework combining physiological and molecular tipping points of Pacific oyster

Type Article
Date 2022-05
Language English
Author(s) Lutier MathieuORCID1, Di Poi Broussard CaroleORCID4, Gazeau FrédéricORCID2, Appolis Alexis4, Le Luyer JeremyORCID3, Pernet FabriceORCID1
Affiliation(s) 1 : LEMAR CNRS/UBO/IRD/Ifremer, ZI pointe du diable, CS 10070 F‐29280 Plouzané , France
2 : LOV Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche‐sur‐Mer ,France
3 : EIO UPF/IRD/ILM/Ifremer, Labex CORAIL, Unité RMPF, Centre Océanologique du Pacifique, Vairao – BP 49 Vairao, Tahiti, Polynésie française
4 : LEMAR CNRS/UBO/IRD/Ifremer, ZI pointe du diable, CS 10070 F‐29280 Plouzané , France
Source Global Change Biology (1354-1013) (Wiley), 2022-05 , Vol. 28 , N. 10 , P. 3333-3348
DOI 10.1111/gcb.16101
WOS© Times Cited 3
Keyword(s) acidification, lipidomic, mollusk, reaction norm, threshold, transcriptomic
Abstract

Studies on the impact of ocean acidification on marine organisms involve exposing organisms to future acidification scenarios which has limited relevance for coastal calcifiers living in a mosaic of habitats. Identification of tipping points beyond which detrimental effects are observed is a widely generalizable proxy of acidification susceptibility at the populational level. This approach is limited to a handful of studies that focus on only a few macro-physiological traits, thus overlooking the whole organism response. Here we develop a framework to analyze the broad macro-physiological and molecular responses over a wide pH range in juvenile oyster. We identify low tipping points for physiological traits at pH 7.3-6.9 that coincide with a major reshuffling in membrane lipids and transcriptome. In contrast, a drop in pH affects shell parameters above tipping points, likely impacting animal fitness. These findings were made possible by the development of an innovative methodology to synthesize and identify the main patterns of variations in large -omic datasets, fitting them to pH and identifying molecular tipping-points. We propose the broad application of our framework to the assessment of effects of global change on other organisms.

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How to cite 

Lutier Mathieu, Di Poi Broussard Carole, Gazeau Frédéric, Appolis Alexis, Le Luyer Jeremy, Pernet Fabrice (2022). Revisiting tolerance to ocean acidification: insights from a new framework combining physiological and molecular tipping points of Pacific oyster. Global Change Biology, 28(10), 3333-3348. Publisher's official version : https://doi.org/10.1111/gcb.16101 , Open Access version : https://archimer.ifremer.fr/doc/00749/86130/