Regulation of calcification site pH is a polyphyletic but not always governing response to ocean acidification

• Published in: Science Advances
• Main Authors: Liu, Yi-Wei, Sutton, Jill, Ries, Justin B., Eagle, Robert A.
• Other Authors: Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute of Earth Sciences Tapei (IES Sinica), Academia Sinica, Northeastern University's Marine Science Center, Northeastern University Boston, Department of Atmospheric and Oceanic Sciences Los Angeles (AOS), University of California Los Angeles (UCLA), University of California-University of California, Laboratoire d'Excellence LabexMER ANR-10-LABX-19, French government under the program "Investissements d'Avenir"French National Research Agency (ANR), NSFNational Science Foundation (NSF) OCE-1437166, OCE-1437371, Pritzker Endowment, Institute of Earth Sciences, Academia Sinica, TaiwanAcademia Sinica - Taiwan, ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: ISOTOPIC COMPOSITION; BORIC-ACID; BORON; SEAWATER; CALCITE; ARAGONITE; IMPACTS; FRACTIONATION; TEMPERATURE; SPECIATION; ACL; [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; Ocean acidification
• Online Access: https://hal.archives-ouvertes.fr/hal-02933391; https://hal.archives-ouvertes.fr/hal-02933391/document; https://hal.archives-ouvertes.fr/hal-02933391/file/eaax1314.full.pdf; https://doi.org/10.1126/sciadv.aax1314

International audience The response of marine-calcifying organisms to ocean acidification (OA) is highly variable, although the mechanisms behind this variability are not well understood. Here, we use the boron isotopic composition (delta B-11) of biogenic calcium carbonate to investigate the extent to which organisms' ability to regulate pH at their site of calcification (pH(CF)) determines their calcification responses to OA. We report comparative delta B-11 analyses of 10 species with divergent calcification responses (positive, parabolic, threshold, and negative) to OA. Although the pH(CF) is closely coupled to calcification responses only in 3 of the 10 species, all 10 species elevate pH(CF) above pH(sw) under elevated pCO(2). This result suggests that these species may expend additional energy regulating pH(CF) under future OA. This strategy of elevating pH(CF) above pH(sw) appears to be a polyphyletic, if not universal, response to OA among marine calcifiers-although not always the principal factor governing a species' response to OA.