Resilience to temperature and pH changes in a future climate change scenario in six strains of the polar diatom Fragilariopsis cylindrus ...

• Main Authors: Pančić, M, Hansen, Per Juel, Tammilehto, A, Lundholm, Nina
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Bottles or small containers/Aquaria <20 L; Chromista; Coast and continental shelf; Fragilariopsis cylindrus; Growth/Morphology; Laboratory experiment; North Atlantic; Ochrophyta; Pelagos; Polar; Single species; Temperature; Type; Species; Registration number of species; Uniform resource locator/link to reference; Strain; pH, NBS scale; Temperature, water; Growth rate; Time in days; Cumulative cell concentration, logarithm; Cumulative cell concentration, logarithm, standard deviation; Salinity; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Bicarbonate; Bicarbonate, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Carbonate system computation flag; pH, total scale; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Alkalinity, total; Aragonite saturation state; Calcite saturation state; Potentiometric; Infrared gas analyzer; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Greenland; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.859285; https://doi.pangaea.de/10.1594/PANGAEA.859285

The effects of ocean acidification and increased temperature on physiology of six strains of the polar diatom Fragilariopsis cylindrus from Greenland were investigated. Experiments were performed under manipulated pH levels (8.0, 7.7, 7.4, and 7.1) and different temperatures (1, 5, and 8 °C) to simulate changes from present to plausible future levels. Each of the 12 scenarios was run for 7 days, and a significant interaction between temperature and pH on growth was detected. By combining increased temperature and acidification, the two factors counterbalanced each other, and therefore no effect on the growth rates was found. However, the growth rates increased with elevated temperatures by 20-50% depending on the strain. In addition, a general negative effect of increasing acidification on growth was observed. At pH 7.7 and 7.4, the growth response varied considerably among strains. However, a more uniform response was detected at pH 7.1 with most of the strains exhibiting reduced growth rates by 20-37% ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 is 2016-04-01. ...