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Haynert, Kristin; Schönfeld, Joachim (2014): Impact of changing carbonate chemistry, temperature, and salinity on growth and test degradation of the benthic foraminifer Ammonia aomoriensis. PANGAEA, https://doi.org/10.1594/PANGAEA.832994, Supplement to: Haynert, K; Schönfeld, J (2014): Impact of changing carbonate chemistry, temperature, and salinity on growth and test degradation of the benthic foraminifer Ammonia aomoriensis. Journal of Foraminiferal Research, 44(2), 76-89, https://doi.org/10.2113/gsjfr.44.2.76

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Abstract:
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 a critical Omega calc of 0.5. Elevated temperature (18°C) led to increased Omega calc, larger test diameter, and lower test degradation. Maximal growth was observed at 18°C. No significant relationship was observed between salinity and test growth. Lowered and undersaturated Omega calc, which results from increasing pCO2 in bottom waters, may cause a significant future decline of the population density of A. aomoriensis in its natural environment. At the same time, this effect might be partially compensated by temperature rise due to global warming.
Keyword(s):
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
Further details:
Lavigne, Héloise; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. https://cran.r-project.org/package=seacarb
Comment:
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.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1SpeciesSpeciesHaynert, Kristin
2FigureFigHaynert, Kristin
3TableTabHaynert, Kristin
4Temperature, waterTemp°CHaynert, Kristin
5SalinitySalHaynert, Kristin
6Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmHaynert, Kristin
7PercentagePerc%Haynert, Kristinliving specimens, with cytoplasm
8PercentagePerc%Haynert, Kristindead tests, without cytoplasm
9Incubation durationInc durdaysHaynert, Kristin
10Temperature, waterTemp°CHaynert, Kristin
11Temperature, water, standard deviationTemp std dev±Haynert, Kristin
12SalinitySalHaynert, Kristin
13Salinity, standard deviationSal std dev±Haynert, Kristin
14pHpHHaynert, KristinPotentiometricNBS scale
15pH, standard deviationpH std dev±Haynert, KristinPotentiometricNBS scale
16Alkalinity, totalATµmol/kgHaynert, KristinPotentiometric titration
17Alkalinity, total, standard deviationAT std dev±Haynert, KristinPotentiometric titration
18Phosphate[PO4]3-µmol/lHaynert, KristinColorimetric
19Phosphate, standard deviationPO4 std dev±Haynert, KristinColorimetric
20SilicateSi(OH)4µmol/lHaynert, KristinColorimetric
21Silicate, standard deviationSi(OH)4 std dev±Haynert, KristinColorimetric
22Carbon, inorganic, dissolvedDICµmol/kgHaynert, KristinCalculated using CO2SYS
23Carbon, inorganic, dissolved, standard deviationDIC std dev±Haynert, KristinCalculated using CO2SYS
24Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmHaynert, KristinCalculated using CO2SYS
25Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Haynert, KristinCalculated using CO2SYS
26Calcite saturation stateOmega CalHaynert, KristinCalculated using CO2SYS
27Calcite saturation state, standard deviationOmega Cal std dev±Haynert, KristinCalculated using CO2SYS
28Diameter changeØ changeµmHaynert, Kristin
29Diameter change, standard deviationDiam change std dev±Haynert, Kristin
30SurvivalSurvival%Haynert, Kristin
31Survival rate, standard deviationSurvival rate std dev±Haynert, Kristin
32Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
33pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
34Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
35Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
37Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
38Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
39Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
2538 data points

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