Seawater carbonate chemistry and photosynthesis and photochemical efficiency of Porolithon onkodes

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 pCO2 and light treatments. Results indicate OA inhibited some aspects of photophysiology (maximum photochemical efficiency), facilitated others (alpha, 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.

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Cite this as

Briggs, Amy A, Carpenter, Robert C (2019). Dataset: Seawater carbonate chemistry and photosynthesis and photochemical efficiency of Porolithon onkodes. https://doi.org/10.1594/PANGAEA.920025

DOI retrieved: 2019

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-4.0
Source https://doi.org/10.1594/PANGAEA.920025
Author Briggs, Amy A
Given Name Amy A
Family Name Briggs
More Authors
Carpenter, Robert C
Source Creation 2019
Publication Year 2019
Resource Type text/tab-separated-values - filename: Briggs-Carpenter_2019_SR
Subject Areas
Name: BiologicalClassification

Name: Chemistry

Related Identifiers
Title: Contrasting responses of photosynthesis and photochemical efficiency to ocean acidification under different light environments in a calcifying alga
Identifier: https://doi.org/10.1038/s41598-019-40620-8
Type: DOI
Relation: References
Year: 2019
Source: Scientific Reports
Authors: Briggs Amy A , Carpenter Robert C , Gattuso Jean-Pierre , Epitalon Jean-Marie , Lavigne Héloïse , Orr James C , Gentili Bernard , Hagens Mathilde , Hofmann Andreas , Mueller Jens-Daniel , Proye Aurélien , Rae James , Soetaert Karline .

Title: seacarb: seawater carbonate chemistry with R. R package version 3.2.12
Identifier: https://CRAN.R-project.org/package=seacarb
Type: DOI
Relation: References
Year: 2019
Authors: Briggs Amy A , Carpenter Robert C , Gattuso Jean-Pierre , Epitalon Jean-Marie , Lavigne Héloïse , Orr James C , Gentili Bernard , Hagens Mathilde , Hofmann Andreas , Mueller Jens-Daniel , Proye Aurélien , Rae James , Soetaert Karline .