Tolerance of juvenile barnacles (Amphibalanus improvisus) to warming and elevated pCO2

• Main Authors: Pansch, Christian, Nasrolahi, Ali, Appelhans, Yasmin S, Wahl, Martin
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Alkalinity; total; standard deviation; Amphibalanus improvisus; Animalia; Aragonite saturation state; Arthropoda; Ash free dry mass; Ash mass; Baltic Sea; Benthic animals; Benthos; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Condition index; Diameter; Dry mass; Figure; Force; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Incubation duration; Laboratory experiment; Number; OA-ICC; Ocean Acidification International Coordination Centre; Organic matter; Partial pressure of carbon dioxide; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.831429; https://doi.org/10.1594/PANGAEA.831429

We investigated the impacts of warming and elevated pCO2 on newly settled Amphibalanus improvisus from Kiel Fjord, an estuarine ecosystem characterized by significant natural pCO2 variability. In two experiments, juvenile barnacles were maintained at two temperature and three pCO2 levels (20/24°C, 700-2.140 µatm) for 8 weeks in a batch culture and at four pCO2 levels (20°C, 620-2.870 µatm) for 12 weeks in a water flow-through system. Warming as well as elevated pCO2 hardly affected growth or the condition index of barnacles, although some factor combinations led to temporal significances in enhanced or reduced growth with an increase in pCO2. While warming increased the shell strength of A. improvisus individuals, elevated pCO2 had only weak effects. We demonstrate a strong tolerance of juvenile A. improvisus to mean acidification levels of about 1,000 µatm pCO2 as is already naturally experienced by the investigated barnacle population.