Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga
Ocean acidification (OA) is predicted to enhance photosynthesis in many marine taxa. However, photophysiology has multiple components that OA may affect differently, especially under different light environments, with potentially contrasting consequences for photosynthetic performance. Furthermore,...
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ftpubmed:oai:pubmedcentral.nih.gov:6408467 2023-05-15T17:50:27+02:00 Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga Briggs, Amy A. Carpenter, Robert C. 2019-03-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408467/ http://www.ncbi.nlm.nih.gov/pubmed/30850681 https://doi.org/10.1038/s41598-019-40620-8 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408467/ http://www.ncbi.nlm.nih.gov/pubmed/30850681 http://dx.doi.org/10.1038/s41598-019-40620-8 © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2019 ftpubmed https://doi.org/10.1038/s41598-019-40620-8 2019-03-17T01:20:37Z Ocean acidification (OA) is predicted to enhance photosynthesis in many marine taxa. However, photophysiology has multiple components that OA may affect differently, especially under different light environments, with potentially contrasting consequences for photosynthetic performance. Furthermore, because photosynthesis affects energetic budgets and internal acid-base dynamics, changes in it due to OA or light could mediate the sensitivity of other biological processes to OA (e.g. respiration and calcification). To better understand these effects, we conducted experiments on Porolithon onkodes, a common crustose coralline alga in Pacific coral reefs, crossing pCO(2) and light treatments. Results indicate OA inhibited some aspects of photophysiology (maximum photochemical efficiency), facilitated others (α, the responsiveness of photosynthesis to sub-saturating light), and had no effect on others (maximum gross photosynthesis), with the first two effects depending on treatment light level. Light also exacerbated the increase in dark-adapted respiration under OA, but did not alter the decline in calcification. Light-adapted respiration did not respond to OA, potentially due to indirect effects of photosynthesis. Combined, results indicate OA will interact with light to alter energetic budgets and potentially resource allocation among photosynthetic processes in P. onkodes, likely shifting its light tolerance, and constraining it to a narrower range of light environments. Text Ocean acidification PubMed Central (PMC) Pacific Scientific Reports 9 1 |
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Article Briggs, Amy A. Carpenter, Robert C. Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
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Article |
description |
Ocean acidification (OA) is predicted to enhance photosynthesis in many marine taxa. However, photophysiology has multiple components that OA may affect differently, especially under different light environments, with potentially contrasting consequences for photosynthetic performance. Furthermore, because photosynthesis affects energetic budgets and internal acid-base dynamics, changes in it due to OA or light could mediate the sensitivity of other biological processes to OA (e.g. respiration and calcification). To better understand these effects, we conducted experiments on Porolithon onkodes, a common crustose coralline alga in Pacific coral reefs, crossing pCO(2) and light treatments. Results indicate OA inhibited some aspects of photophysiology (maximum photochemical efficiency), facilitated others (α, the responsiveness of photosynthesis to sub-saturating light), and had no effect on others (maximum gross photosynthesis), with the first two effects depending on treatment light level. Light also exacerbated the increase in dark-adapted respiration under OA, but did not alter the decline in calcification. Light-adapted respiration did not respond to OA, potentially due to indirect effects of photosynthesis. Combined, results indicate OA will interact with light to alter energetic budgets and potentially resource allocation among photosynthetic processes in P. onkodes, likely shifting its light tolerance, and constraining it to a narrower range of light environments. |
format |
Text |
author |
Briggs, Amy A. Carpenter, Robert C. |
author_facet |
Briggs, Amy A. Carpenter, Robert C. |
author_sort |
Briggs, Amy A. |
title |
Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
title_short |
Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
title_full |
Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
title_fullStr |
Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
title_full_unstemmed |
Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
title_sort |
contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga |
publisher |
Nature Publishing Group UK |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408467/ http://www.ncbi.nlm.nih.gov/pubmed/30850681 https://doi.org/10.1038/s41598-019-40620-8 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408467/ http://www.ncbi.nlm.nih.gov/pubmed/30850681 http://dx.doi.org/10.1038/s41598-019-40620-8 |
op_rights |
© The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-40620-8 |
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Scientific Reports |
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