Impact of changing carbonate chemistry, temperature, and salinity on growth and test degradation of the benthic foraminifer Ammonia aomoriensis ...

• Main Authors: Haynert, Kristin, Schönfeld, Joachim
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Ammonia aomoriensis; Baltic Sea; Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Coast and continental shelf; Foraminifera; Growth/Morphology; Heterotrophic prokaryotes; Laboratory experiment; Mortality/Survival; Salinity; Single species; Temperate; Temperature; Species; Figure; Table; Temperature, water; Partial pressure of carbon dioxide water at sea surface temperature wet air; Percentage; Incubation duration; Temperature, water, standard deviation; Salinity, standard deviation; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Phosphate; Phosphate, standard deviation; Silicate; Silicate, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Partial pressure of carbon dioxide, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Diameter change; Diameter change, standard deviation; Survival; Survival rate, standard deviation; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Potentiometric; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.832994; https://doi.pangaea.de/10.1594/PANGAEA.832994

The present study investigated the combined effects of ocean acidification, temperature, and salinity on growth and test degradation of Ammonia aomoriensis. This species is one of the dominant benthic foraminifera in near-coastal habitats of the southwestern Baltic Sea that can be particularly sensitive to changes in seawater carbonate chemistry. To assess potential responses to ocean acidification and climate change, we performed a fully crossed experiment involving three temperatures (8, 13, and 18°C), three salinities (15, 20, and 25) and four pCO2 levels (566, 1195, 2108, and 3843 µatm) for six weeks. Our results highlight a sensitive response of A. aomoriensis to undersaturated seawater with respect to calcite. The specimens continued to grow and increase their test diameter in treatments with pCO2 <1200 µatm, when Omega calc >1. Growth rates declined when pCO2 exceeded 1200 µatm (Omega calc <1). A significant reduction in test diameter and number of tests due to dissolution was observed below ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-05-26. ...