Experiment: Combined effects of CO2, temperature, irradiance and time on the physiological performance of Chondrus crispus (Rhodophyta), supplement to: Sarker, Mohammed Yusuf; Bartsch, Inka; Olischläger, Mark; Gutow, Lars; Wiencke, Christian (2013): Combined effects of CO2, temperature, irradiance and time on the physiological performance of Chondrus crispus (Rhodophyta). Botanica Marina, 56(1), 63-74

• Main Author: Sarker, Mohammed Yusuf
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2012
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Chondrus crispus; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Light; Macroalgae; North Atlantic; Plantae; Primary production/Photosynthesis; Rhodophyta; Single species; Temperate; Temperature; Species; Experiment; Treatment; Replicate; Incubation duration; Mass; Temperature, water; Irradiance; Growth rate; Net photosynthesis rate, oxygen; Salinity; pH; Alkalinity, total; Carbon dioxide, partial pressure; Bicarbonate ion; Carbon dioxide; Carbonate ion; Carbonate system computation flag; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Carbon, inorganic, dissolved; 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; Helgoland; Wiencke; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.830139; https://doi.pangaea.de/10.1594/PANGAEA.830139

In natural environments, marine biotas are exposed to a variety of simultaneously acting abiotic factors. Among these, temperature, irradiance and CO2 availability are major factors influencing the physiological performance of marine macroalgae. To test whether elevated levels of CO2 may remediate the otherwise reduced performance of uncalcified seaweeds under the influence of other stressful abiotic factors, we performed multifactorial experiments with the red alga Chondrus crispus from Helgoland (North Sea) with two levels of CO2, temperature and irradiance: low and high pCO2 levels were tested in combination with either (1) optimal and low irradiances or (2) optimal and sub-lethal high temperatures for growth. Performance of C. crispus was evaluated as biomass increase and relative growth rates (RGR), gross photosynthesis and pigment content. Acclimations of growth and photosynthesis were measured after 4 and 8 days. Acclimation time was crucial for elucidating single or combined CO2 effects on growth and photosynthesis. Signifi- cant CO2 effects became evident only in combination with either elevated temperature or reduced irradiance. Growth and photosynthesis had divergent patterns: RGR and biomass significantly increased only under a combination of high pCO2 and elevated temperature; gross photosynthesis was significantly reduced under high pCO2 conditions at low irradiance. Pigment content varied in response to irradiance and temperature, but was independent of pCO2. : 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.