Early life stages of the Arctic copepod Calanus glacialis are unaffected by increased seawater pCO2

• Main Authors: Bailey, Allison, Thor, Peter, Browman, Howard I, Fields, David M, Runge, Jeffrey A, Vermont, Alexander, Bjelland, Reidun, Thompson, Cameron R S, Shema, Steven, Durif, Caroline M F, Hop, Haakon
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Alkalinity; total; standard error; Animalia; Aragonite saturation state; Arctic; Arthropoda; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calanus glacialis; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbon/Nitrogen ratio; Carbonate ion; Carbonate system computation flag; Carbon content per individual; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Development; Dry mass; Duration; number of days; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Laboratory experiment; Median development time; Arctic copepod; Ocean acidification; Sea ice; Svalbard
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.861734; https://doi.org/10.1594/PANGAEA.861734

As the world's oceans continue to absorb anthropogenic CO2 from the atmosphere, the carbonate chemistry of seawater will change. This process, termed ocean acidification, may affect the physiology of marine organisms. Arctic seas are expected to experience the greatest decreases in pH in the future, as changing sea ice dynamics and naturally cold, brackish water, will accelerate ocean acidification. In this study, we investigated the effect of increased pCO2 on the early developmental stages of the key Arctic copepod Calanus glacialis. Eggs from wild-caught C. glacialis females from Svalbard, Norway (80°N), were cultured for 2 months to copepodite stage C1 in 2°C seawater under four pCO2 treatments (320, 530, 800, and 1700 matm). Developmental rate, dry weight, and carbon and nitrogen mass were measured every other day throughout the experiment, and oxygen consumption rate was measured at stages N3, N6, and C1. All endpoints were unaffected by pCO2 levels projected for the year 2300. These results indicate that naupliar development in wild populations of C. glacialis is unlikely to be detrimentally affected in a future high CO2 ocean.