Thermal stress reduces pocilloporid coral resilience to ocean acidification by impairing control over calcifying fluid chemistry

Type Article
Date 2021-01
Language English
Author(s) Guillermic Maxence1, 2, 3, Cameron Louise P.4, 5, 6, de Corte Ilian1, 2, Misra Sambuddha7, 8, Bijma Jelle9, de Beer Dirk10, Reymond Claire E.6, 11, Westphal HildegardORCID6, 12, Ries Justin B.4, 6, Eagle Robert A.1, 2, 3
Affiliation(s) 1 : Univ Calif Los Angeles, Inst Environm & Sustainabil, Dept Atmospher & Ocean Sci, 520 Portola Plaza, Los Angeles, CA 90095 USA.
2 : Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, 595 Charles Young Dr E, Los Angeles, CA 90095 USA.
3 : Univ Brest Occidentale, LGO, Inst Univ Europe Mer, Rue Dumont Urville, F-29280 Plouzane, France.
4 : Northeastern Univ, Marine Sci Ctr, Dept Marine & Environm Sci, 430 Nahant Rd, Nahant, MA 01908 USA.
5 : Woods Hole Oceanog Inst, McLean Lab, 360 Woods Hole Rd, Falmouth, MA 02543 USA.
6 : Leibniz Ctr ForTrop Marine Res ZMT, Fahrenheitstr 6, D-28359 Bremen, Germany.
7 : Indian Inst Sci, Ctr Earth Sci, Bengaluru 560012, Karnataka, India.
8 : Univ Cambridge, Dept Earthsci, Godwin Lab Palaeoclimate Res, Cambridge, England.
9 : Alfred Wegener Inst, Helmholtz Zentrum Polar & Meeresforsch, Marine Biogeosci, Handelshafen 12, D-27570 Bremerhaven, Germany.
10 : Max Planck Inst Marine Microbiol, Celsiusstr 1, D-28359 Bremen, Germany.
11 : China Univ Geosci CUG, State Key Lab Biogeol & Environm Geol, 388 Lumo Rd, Wuhan 430074, Peoples R China.
12 : Bremen Univ, Dept Geosci, D-28359 Bremen, Germany.
Source Science Advances (2375-2548) (Amer Assoc Advancement Science), 2021-01 , Vol. 7 , N. 2 , P. eaba9958 (18p.)
DOI 10.1126/sciadv.aba9958
WOS© Times Cited 8

The combination of thermal stress and ocean acidification (OA) can more negatively affect coral calcification than an individual stressors, but the mechanism behind this interaction is unknown. We used two independent methods (microelectrode and boron geochemistry) to measure calcifying fluid pH (pH(cf)) and carbonate chemistry of the corals Pocillopora damicornis and Stylophora pistillata grown under various temperature and pCO(2) conditions. Although these approaches demonstrate that they record pH(cf) over different time scales, they reveal that both species can cope with OA under optimal temperatures (28 degrees C) by elevating pH(cf) and aragonite saturation state (Omega(cf)) in support of calcification. At 31 degrees C, neither species elevated these parameters as they did at 28 degrees C and, likewise, could not maintain substantially positive calcification rates under any pH treatment. These results reveal a previously uncharacterized influence of temperature on coral pH(cf) regulation-the apparent mechanism behind the negative interaction between thermal stress and OA on coral calcification.

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Guillermic Maxence, Cameron Louise P., de Corte Ilian, Misra Sambuddha, Bijma Jelle, de Beer Dirk, Reymond Claire E., Westphal Hildegard, Ries Justin B., Eagle Robert A. (2021). Thermal stress reduces pocilloporid coral resilience to ocean acidification by impairing control over calcifying fluid chemistry. Science Advances, 7(2), eaba9958 (18p.). Publisher's official version : , Open Access version :