Data to Impact of ocean acidification on thermal tolerance and acid-base regulation of Mytilus edulis from the White Sea ...

• Main Authors: Zittier, Zora M C, Bock, Christian, Sukhotin, Alexey A, Häfker, N Sören, Pörtner, Hans-Otto
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: Experimental treatment; Temperature, water; Salinity; Individual code; Respiration rate, oxygen, per dry mass; Mytilus edulis, haemolymph, partial pressure of oxygen; Mytilus edulis, haemolymph, partial pressure of carbon dioxide; Mytilus edulis, haemolymph, pH; Mytilus edulis, haemolymph, carbon dioxide; Mytilus edulis, haemolymph, bicarbonate ion; Mytilus edulis, extrapallial fluid partial pressure of oxygen; Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide; Mytilus edulis, extrapallial fluid pH; Mytilus edulis, extrapallial fluid carbon dioxide; Mytilus edulis, mantle tissue, succinate; Mytilus edulis, mantle tissue, pH; Mytilus edulis, mantle tissue, carbon dioxide; Mytilus edulis, mantle tissue, partial pressure of carbon dioxide; Mytilus edulis, mantle tissue, bicarbonate ion; Experiment; Oxygen optode, flow-through respirometry; Blood gas analyser, Eschweiler, MT 33; Gas chromatography; Calculated after Heisler 1986; 1H NMR spectroscopy; Homogenate method by Pörtner et al. 1990 and pH optode, PreSens, Needle-Type-Housing-pH-Microsensor; European Project on Ocean Acidification EPOCA; Arctic; Sören; White Sea; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.892316; https://doi.pangaea.de/10.1594/PANGAEA.892316

Ocean warming and acidification are two important environmental drivers affecting marine organisms. Organisms living at high latitudes might be especially threatened in near future, as current environmental changes are larger and occur faster. Therefore, we investigated the effect of hypercapnia on thermal tolerance and physiological performance of sub-Arctic Mytilus edulis from the White Sea. Mussels were exposed (2 weeks) to 390 µatm (control) and 1,120 µatm CO2 (year 2100) before respiration rate (MO2), anaerobic metabolite (succinate) level, haemolymph acid-base status, and intracellular pH (pHi) were determined during acute warming (10-28°C, 3°C over night).In normocapnic mussels, warming induced MO2 to rise exponentially until it levelled off beyond a breakpoint temperature of 20.5°C. Concurrently, haemolymph PCO2 rose significantly >19°C followed by a decrease in PO2 indicating the pejus temperature (TP, onset of thermal limitation). Succinate started to accumulate at 28°C under normocapnia ... : Supplement to: Zittier, Zora M C; Bock, Christian; Sukhotin, Alexey A; Häfker, N Sören; Pörtner, Hans-Otto (2018): Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea. Polar Biology, 41(11), 2261-2273 ...