Seawater carbonate chemistry and experiment on pH effects on coralline-epiphyte complex (Ellisolandia elongata) ...

• Main Authors: Guy-Haim, Tamar, Silverman, Jacob, Wahl, Martin, Aguirre, Julio, Noisette, Fanny, Rilov, Gil
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Ellisolandia elongata; Laboratory experiment; Macroalgae; Mediterranean Sea; Other; Other studied parameter or process; Plantae; Primary production/Photosynthesis; Respiration; Rhodophyta; Single species; Temperate; Type of study; Species; Experiment; Treatment pH; Treatment; Net photosynthesis rate, oxygen; Net photosynthesis rate, standard deviation; Respiration rate, oxygen, per dry mass; Respiration rate, oxygen, standard deviation; Net calcification rate of calcium carbonate; Calcification rate, standard deviation; Biomass, ash free dry mass; Biomass, ash free dry mass, standard deviation; Distance; Oxygen; pH; Aragonite saturation state; Carbon dioxide, aquatic; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.960969; https://doi.pangaea.de/10.1594/PANGAEA.960969

Coralline algae, a major calcifying component of coastal shallow water communities, have been shown to be one of the more vulnerable taxonomic groups to ocean acidification (OA). Under OA, the interaction between corallines and epiphytes was previously described as both positive and negative. We hypothesized that the photosynthetic activity and the complex structure of non-calcifying epiphytic algae that grow on corallines ameliorate the chemical microenvironmental conditions around them, providing protection from OA. Using mesocosm and microsensor experiments, we showed that the widespread coralline Ellisolandia elongata is less susceptible to the detrimental effects of OA when covered with non-calcifying epiphytic algae, and its diffusive boundary layer is thicker than when not covered by epiphytes. By modifying the microenvironmental carbonate chemistry, epiphytes, facilitated by OA, create micro-scale shield (and refuge) with more basic conditions that may allow the persistence of corallines associated ... : 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 2023-07-17. ...