Experiment: Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels, supplement to: Hofmann, Laurie C; Yildiz, Gamse; Hanelt, D; Bischof, Kai (2011): Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels. Marine Biology, 159(4), 783-792

• Main Authors: Hofmann, Laurie C, Yildiz, Gamse, Hanelt, D, Bischof, Kai
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2012
• Subjects: Benthos; Calcification/Dissolution; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Corallina officinalis; Growth/Morphology; Laboratory experiment; Macroalgae; North Atlantic; Plantae; Primary production/Photosynthesis; Rhodophyta; Single species; Temperate; Species; Treatment; Group; Replicate; Incubation duration; Date; Time of day; Maximum photochemical quantum yield of photosystem II; Irradiance; Gross oxygen evolution, per chlorophyll a; Net oxygen evolution, per chlorophyll a; Calcified area; Growth rate; Carbonic anhydrase, activity; Organic matter; Inorganic matter; Fluorescence, yield at any given time; Electron transport rate; Yield; Photochemical quenching; Non photochemical quenching; Fluorescence, maximum, without dark adaptation; Fluorescence, minimum, without dark adaptation; Temperature, water; Salinity; pH; pH, standard error; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Alkalinity, total; Aragonite saturation state; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Biological Impacts of Ocean Acidification BIOACID; Ocean Acidification International Coordination Centre OA-ICC; Hofmann; Laurie; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.830128; https://doi.pangaea.de/10.1594/PANGAEA.830128

Future atmospheric CO2 levels will most likely have complex consequences for marine organisms, particulary photosynthetic calcifying organisms. Corallina officinalis L. is an erect calcifying macroalga found in the inter- and subtidal regions of temperate rocky coastlines and provides important substrate and refugia for marine meiofauna. The main goal of the current study was to determine the physiological responses of C. officinalis to increased CO2 concentrations expected to occur within the next century and beyond. Our results show that growth and production of inorganic material decreased under high CO2 levels, while carbonic anhydrase activity was stimulated and negatively correlated to algal inorganic content. Photosynthetic efficiency based on oxygen evolution was also negatively affected by increased CO2. The results of this study indicate that C. officinalis may become less competitive under future CO2 levels, which could result in structural changes in future temperate intertidal communities. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 2014-02-11.