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The combined effects of ocean acidification and copper on the physiological responses of the tropical coral Stylophora pistillata

The combined effects of ocean acidification and copper on the physiological responses of the tropical coral Stylophora pistillata
The combined effects of ocean acidification and copper on the physiological responses of the tropical coral Stylophora pistillata

A decrease in ocean pH of 0.3 units will likely double the proportion of dissolved copper (Cu) present as the free metal ion, Cu 2+, the most bioavailable form of Cu, and one of the most common marine pollutants. We assess the impact of ocean acidification and Cu, separately and in combination, on calcification, photosynthesis and respiration of sub-colonies of a single tropical Stylophora pistillata colony. After 15 days of treatment, total calcification rates were significantly decreased in corals exposed to high seawater pCO 2 (∼1000-μatm, 2100 scenario) and at both ambient (1.6–1.9 nmols) and high (2.5–3.6 nmols) dissolved Cu concentrations compared to controls. The effect was increased when both stressors were combined. Coral respiration rates were significantly reduced by the combined stressors after 2 weeks of exposure, indicating the importance of experiment duration. It is therefore likely rising atmospheric CO 2 will exacerbate the negative effects of Cu pollution to S. pistillata.

Calcification, Copper, Coral, Ocean acidification, Respiration
0141-1136
Cryer, S.E.
16bfcad1-bb17-4215-8aa9-bf1d3f6ab127
Schlosser, C.
93df4206-5ae4-48a3-80b9-d6f4fc2d4b0a
Allison, N.
aa19d194-15d5-4de7-96d4-b960f520fd39
Cryer, S.E.
16bfcad1-bb17-4215-8aa9-bf1d3f6ab127
Schlosser, C.
93df4206-5ae4-48a3-80b9-d6f4fc2d4b0a
Allison, N.
aa19d194-15d5-4de7-96d4-b960f520fd39

Cryer, S.E., Schlosser, C. and Allison, N. (2022) The combined effects of ocean acidification and copper on the physiological responses of the tropical coral Stylophora pistillata. Marine Environmental Research, 176, [105610]. (doi:10.1016/j.marenvres.2022.105610).

Record type: Article

Abstract

A decrease in ocean pH of 0.3 units will likely double the proportion of dissolved copper (Cu) present as the free metal ion, Cu 2+, the most bioavailable form of Cu, and one of the most common marine pollutants. We assess the impact of ocean acidification and Cu, separately and in combination, on calcification, photosynthesis and respiration of sub-colonies of a single tropical Stylophora pistillata colony. After 15 days of treatment, total calcification rates were significantly decreased in corals exposed to high seawater pCO 2 (∼1000-μatm, 2100 scenario) and at both ambient (1.6–1.9 nmols) and high (2.5–3.6 nmols) dissolved Cu concentrations compared to controls. The effect was increased when both stressors were combined. Coral respiration rates were significantly reduced by the combined stressors after 2 weeks of exposure, indicating the importance of experiment duration. It is therefore likely rising atmospheric CO 2 will exacerbate the negative effects of Cu pollution to S. pistillata.

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The combined effects of ocean acidification and copper on the physiological responses of the tropical coral Stylophora pistillata - Accepted Manuscript
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Accepted/In Press date: 16 March 2022
e-pub ahead of print date: 18 March 2022
Published date: April 2022
Additional Information: Funding Information: We thank the Marine Alliance for Science and Technology for Scotland who contributed to the purchase of equipment used in this study (Award SG367). We thank the anonymous reviewers for their constructive comments, which helped to improve this manuscript, and editor Inna Sokolova. Publisher Copyright: © 2022 Elsevier Ltd
Keywords: Calcification, Copper, Coral, Ocean acidification, Respiration

Identifiers

Local EPrints ID: 457387
URI: http://eprints.soton.ac.uk/id/eprint/457387
ISSN: 0141-1136
PURE UUID: d177e368-1260-401f-af53-d62e751a6231
ORCID for S.E. Cryer: ORCID iD orcid.org/0000-0001-7192-7426

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Date deposited: 06 Jun 2022 16:45
Last modified: 27 Jan 2023 02:54

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Contributors

Author: S.E. Cryer ORCID iD
Author: C. Schlosser
Author: N. Allison

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