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Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification.
Sci Rep. 2019 02 18; 9(1):2201.SR

Abstract

The resilience of corals to ocean acidification has been proposed to rely on regulation of extracellular calcifying medium pH (pHECM), but few studies have compared the capacity of coral species to control this parameter at elevated pCO2. Furthermore, exposure to light and darkness influences both pH regulation and calcification in corals, but little is known about its effect under conditions of seawater acidification. Here we investigated the effect of acidification in light and darkness on pHECM, calcifying cell intracellular pH (pHI), calcification, photosynthesis and respiration in three coral species: Stylophora pistillata, Pocillopora damicornis and Acropora hyacinthus. We show that S. pistillata was able to maintain pHECM under acidification in light and darkness, but pHECM decreased in P. damicornis and A. hyacinthus to a much greater extent in darkness than in the light. Acidification depressed calcifying cell pHI in all three species, but we identified an unexpected positive effect of light on pHI. Calcification rate and pHECM decreased together under acidification, but there are inconsistencies in their relationship indicating that other physiological parameters are likely to shape how coral calcification responds to acidification. Overall our study reveals interspecies differences in coral regulation of pHECM and pHI when exposed to acidification, influenced by exposure to light and darkness.

Authors+Show Affiliations

Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. avenn@centrescientifique.mc. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco. avenn@centrescientifique.mc.Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco.Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco.Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco.Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco.Marine Biology Department, Centre Scientifique de Monaco, 8 Quai Antoine 1er, 98000, Monaco, Monaco. Laboratoire Européen Associe 647 « BIOSENSIB », Centre Scientifique de Monaco- Centre National de la Recherche Scientifique, 8 Quai Antoine 1er, 98000, Monaco, Monaco.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30778093

Citation

Venn, A A., et al. "Effects of Light and Darkness On pH Regulation in Three Coral Species Exposed to Seawater Acidification." Scientific Reports, vol. 9, no. 1, 2019, p. 2201.
Venn AA, Tambutté E, Caminiti-Segonds N, et al. Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification. Sci Rep. 2019;9(1):2201.
Venn, A. A., Tambutté, E., Caminiti-Segonds, N., Techer, N., Allemand, D., & Tambutté, S. (2019). Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification. Scientific Reports, 9(1), 2201. https://doi.org/10.1038/s41598-018-38168-0
Venn AA, et al. Effects of Light and Darkness On pH Regulation in Three Coral Species Exposed to Seawater Acidification. Sci Rep. 2019 02 18;9(1):2201. PubMed PMID: 30778093.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification. AU - Venn,A A, AU - Tambutté,E, AU - Caminiti-Segonds,N, AU - Techer,N, AU - Allemand,D, AU - Tambutté,S, Y1 - 2019/02/18/ PY - 2018/06/25/received PY - 2018/12/20/accepted PY - 2019/2/20/entrez PY - 2019/2/20/pubmed PY - 2020/9/12/medline SP - 2201 EP - 2201 JF - Scientific reports JO - Sci Rep VL - 9 IS - 1 N2 - The resilience of corals to ocean acidification has been proposed to rely on regulation of extracellular calcifying medium pH (pHECM), but few studies have compared the capacity of coral species to control this parameter at elevated pCO2. Furthermore, exposure to light and darkness influences both pH regulation and calcification in corals, but little is known about its effect under conditions of seawater acidification. Here we investigated the effect of acidification in light and darkness on pHECM, calcifying cell intracellular pH (pHI), calcification, photosynthesis and respiration in three coral species: Stylophora pistillata, Pocillopora damicornis and Acropora hyacinthus. We show that S. pistillata was able to maintain pHECM under acidification in light and darkness, but pHECM decreased in P. damicornis and A. hyacinthus to a much greater extent in darkness than in the light. Acidification depressed calcifying cell pHI in all three species, but we identified an unexpected positive effect of light on pHI. Calcification rate and pHECM decreased together under acidification, but there are inconsistencies in their relationship indicating that other physiological parameters are likely to shape how coral calcification responds to acidification. Overall our study reveals interspecies differences in coral regulation of pHECM and pHI when exposed to acidification, influenced by exposure to light and darkness. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/30778093/Effects_of_light_and_darkness_on_pH_regulation_in_three_coral_species_exposed_to_seawater_acidification_ L2 - https://doi.org/10.1038/s41598-018-38168-0 DB - PRIME DP - Unbound Medicine ER -