Mason, Robert A B; Wall, Christopher B; Cunning, Ross; Dove, Sophie; Gates, Ruth D (2023): Seawater carbonate chemistry and the net photosynthesis， gross photosynthesis and respiration in Pocillopora acuta [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961060
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The absorbtion of human-emitted CO2 by the oceans (elevated PCO2) is projected to alter the physiological performance of coral reef organisms by perturbing seawater chemistry (i.e. ocean acidification). Simultaneously, greenhouse gas emissions are driving ocean warming and changes in irradiance (through turbidity and cloud cover), which have the potential to influence the effects of ocean acidification on coral reefs. Here, we explored whether physiological impacts of elevated PCO2 on a coral–algal symbiosis (Pocillopora acuta–Symbiodiniaceae) are mediated by light and/or temperature levels. In a 39 day experiment, elevated PCO2 (962 versus 431 µatm PCO2) had an interactive effect with midday light availability (400 versus 800 µmol photons m−2 s−1) and temperature (25 versus 29°C) on areal gross and net photosynthesis, for which a decline at 29°C was ameliorated under simultaneous high-PCO2 and high-light conditions. Light-enhanced dark respiration increased under elevated PCO2 and/or elevated temperature. Symbiont to host cell ratio and chlorophyll a per symbiont increased at elevated temperature, whilst symbiont areal density decreased. The ability of moderately strong light in the presence of elevated PCO2 to alleviate the temperature-induced decrease in photosynthesis suggests that higher substrate availability facilitates a greater ability for photochemical quenching, partially offsetting the impacts of high temperature on the photosynthetic apparatus. Future environmental changes that result in moderate increases in light levels could therefore assist the P. acuta holobiont to cope with the 'one–two punch' of rising temperatures in the presence of an acidifying ocean.
Keyword(s):
Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Light; North Pacific; Pocillopora acuta; Primary production/Photosynthesis; Respiration; Single species; Temperature; Tropical
Supplement to:
Mason, Robert A B; Wall, Christopher B; Cunning, Ross; Dove, Sophie; Gates, Ruth D (2020): High light alongside elevated P CO2 alleviates thermal depression of photosynthesis in a hard coral ( Pocillopora acuta ). Journal of Experimental Biology, 223(20), jeb223198, https://doi.org/10.1242/jeb.223198
Source:
Mason, Robert A B; Wall, Christopher B; Cunning, Ross; Dove, Sophie; Gates, Ruth D (2020): Data and code for: High light alongside elevated pCO2 alleviates thermal depression of photosynthesis in a hard coral (Pocillopora acuta). Zenodo, https://doi.org/10.5281/zenodo.3526369
Documentation:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2019): seacarb: Seawater Carbonate Chemistry. R package version 3.2.15. https://CRAN.R-project.org/package=seacarb
Project(s):
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2023-07-19.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
5701 data points
Download Data
View dataset as HTML (shows only first 2000 rows)