FN Archimer Export Format PT J TI Regulation of calcification site pH is a polyphyletic but not always governing response to ocean acidification BT AF Liu, Yi-Wei Sutton, Jill Ries, Justin B. Eagle, Robert A. AS 1:1,2;2:1;3:3;4:1,4,5; FF 1:;2:;3:;4:; C1 Université de Brest, UBO, CNRS, IRD, Ifremer, Institut Universitaire Européen de la Mer, LEMAR, Rue Dumont d’Urville, 29280 Plouzané, France. Institute of Earth Sciences, Academia Sinica, 128, Sec. 2, Academia Road, Nangang, Taipei 11529, Taiwan. Department of Marine and Environmental Sciences, Marine Science Center, Northeastern University, 430 Nahant Rd., Nahant, MA 01908, USA. Institute of the Environment and Sustainability, University of California–Los Angeles, La Kretz Hall, 619 Charles E. Young Dr. E #300, Los Angeles, CA 90095, USA. Atmospheric and Oceanic Sciences Department, University of California–Los Angeles, Math Sciences Building, 520 Portola Plaza, Los Angeles, CA 90095, USA. C2 UBO, FRANCE ACAD SINICA, TAIWAN UNIV NORTHEASTERN, USA UNIV CALIF LOS ANGELES, USA UNIV CALIF LOS ANGELES, USA UM LEMAR IN WOS Cotutelle UMR DOAJ copubli-int-hors-europe IF 14.136 TC 29 UR https://archimer.ifremer.fr/doc/00609/72072/70780.pdf https://archimer.ifremer.fr/doc/00609/72072/70781.pdf LA English DT Article AB 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 (δ11B) of biogenic calcium carbonate to investigate the extent to which organisms’ ability to regulate pH at their site of calcification (pHCF) determines their calcification responses to OA. We report comparative δ11B analyses of 10 species with divergent calcification responses (positive, parabolic, threshold, and negative) to OA. Although the pHCF is closely coupled to calcification responses only in 3 of the 10 species, all 10 species elevate pHCF above pHsw under elevated pCO2. This result suggests that these species may expend additional energy regulating pHCF under future OA. This strategy of elevating pHCF above pHsw 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. PY 2020 PD JAN SO Science Advances SN 2375-2548 PU American Association for the Advancement of Science (AAAS) VL 6 IS 5 UT 000512904600006 DI 10.1126/sciadv.aax1314 ID 72072 ER EF