Seawater carbonate chemistry and ecophysiology of brown macroalga Fucus vesiculosus L. ...

• Main Authors: Takolander, Antti, Cabeza, Mar, Leskinen, Elina
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Baltic Sea; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Coast and continental shelf; Fucus vesiculosus; Growth/Morphology; Laboratory experiment; Light; Macroalgae; Ochrophyta; Primary production/Photosynthesis; Single species; Temperate; Type of study; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; ORDINAL NUMBER; Sample ID; Identification; Season; Treatment; Growth rate; Chlorophyll a per unit wet mass; Electron transport rate efficiency; Maximal electron transport rate; Light saturation; Nitrogen, total; Carbon, total; Carbon/Nitrogen ratio; Maximum photochemical quantum yield of photosystem II; Irradiance; pH; pH, standard deviation; Salinity; Salinity, standard deviation; Temperature, water; Temperature, water, standard deviation; Ammonium; Ammonium, standard deviation; Nitrate and Nitrite; Nitrate and Nitrite, standard deviation; Phosphate; Phosphate, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.959648; https://doi.pangaea.de/10.1594/PANGAEA.959648

Stochastic upwelling of seawater in the Baltic Sea from the deep, anoxic bottoms may bring low-pH water rich in CO2 close to the surface. Such events may become more frequent with climate change and ongoing ocean acidification (OA). Photoautotrophs, such as macroalgae, which are important foundation species, have been proposed to benefit from increased carbon availability due to reduced energetic cost in carbon acquisition. However, the exact effects of CO2 fertilization may depend on the ambient light environment, as photosynthesis rates depend on available irradiance. In this experimental study, interacting effects of CO2 addition and irradiance on the habitat-forming macroalga Fucus vesiculosus were investigated during two seasons – winter and summer – in the northern Baltic Sea. Growth rates remained unaffected by CO2 or irradiance during both seasons, suggesting that direct effects of elevated CO2 on mature F. vesiculosus are small. Increases in CO2 affected algal elemental ratios by increasing carbon ... : 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 2023-06-08. ...