Guillermic, M and Cameron, LP and De Corte, I and Misra, S and Bijma, J and De Beer, D and Reymond, CE and Westphal, H and Ries, JB and Eagle, RA (2021) Thermal stress reduces pocilloporid coral resilience to ocean acidification by impairing control over calcifying fluid chemistry. In: Science Advances, 7 (2).
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Abstract
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 (pHcf) and carbonate chemistry of the corals Pocillopora damicornis and Stylophora pistillata grown under various temperature and pCO2conditions. Although these approaches demonstrate that they record pHcf over different time scales, they reveal that both species can cope with OA under optimal temperatures (28°C) by elevating pHcf and aragonite saturation state (�cf) in support of calcification. At 31°C, neither species elevated these parameters as they did at 28°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 pHcf regulation-the apparent mechanism behind the negative interaction between thermal stress and OA on coral calcification. © 2021 American Association for the Advancement of Science. All rights reserved.
| Item Type: | Journal Article |
|---|---|
| Publication: | Science Advances |
| Publisher: | American Association for the Advancement of Science |
| Additional Information: | The copyright of this article belongs to American Association for the Advancement of Science |
| Keywords: | Acidification; Biomineralization; Bone; Microelectrodes, Different time scale; Fluid chemistry; Negative interaction; Ocean acidifications; Optimal temperature; PH treatment; PISTILLATA; Saturation state, Thermal stress |
| Department/Centre: | Division of Mechanical Sciences > Centre for Earth Sciences |
| Date Deposited: | 28 Jan 2021 09:07 |
| Last Modified: | 28 Jan 2021 09:07 |
| URI: | http://eprints.iisc.ac.in/id/eprint/67802 |
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