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Haynert, Kristin; Schönfeld, Joachim; Schiebel, Ralf; Wilson, Brent; Thomsen, Jörn (2014): Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.833014, Supplement to: Haynert, K et al. (2014): Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment. Biogeosciences, 11(6), 1581-1597, https://doi.org/10.5194/bg-11-1581-2014

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Abstract:
Calcifying foraminifera are expected to be endangered by ocean acidification; however, the response of a complete community kept in natural sediment and over multiple generations under controlled laboratory conditions has not been constrained to date. During 6 months of incubation, foraminiferal assemblages were kept and treated in natural sediment with pCO2-enriched seawater of 430, 907, 1865 and 3247 µatm pCO2. The fauna was dominated by Ammonia aomoriensis and Elphidium species, whereas agglutinated species were rare. After 6 months of incubation, pore water alkalinity was much higher in comparison to the overlying seawater. Consequently, the saturation state of Omega calc was much higher in the sediment than in the water column in nearly all pCO2 treatments and remained close to saturation. As a result, the life cycle (population density, growth and reproduction) of living assemblages varied markedly during the experimental period, but was largely unaffected by the pCO2 treatments applied. According to the size-frequency distribution, we conclude that foraminifera start reproduction at a diameter of 250 µm. Mortality of living Ammonia aomoriensis was unaffected, whereas size of large and dead tests decreased with elevated pCO2 from 285 µm (pCO2 from 430 to 1865 µatm) to 258 µm (pCO2 3247 µatm). The total organic content of living Ammonia aomoriensis has been determined to be 4.3% of CaCO3 weight. Living individuals had a calcium carbonate production rate of 0.47 g/m**2/a, whereas dead empty tests accumulated a rate of 0.27 g /m**2/a. Although Omega calc was close to 1, approximately 30% of the empty tests of Ammonia aomoriensis showed dissolution features at high pCO2 of 3247 µatm during the last 2 months of incubation. In contrast, tests of the subdominant species, Elphidium incertum, stayed intact. Our results emphasize that the sensitivity to ocean acidification of the endobenthic foraminifera Ammonia aomoriensis in their natural sediment habitat is much lower compared to the experimental response of specimens isolated from the sediment.
Keyword(s):
Ammonia aomoriensis; Ammotium cassis; Armorella sphaerica; Baltic Sea; Benthos; Coast and continental shelf; Community composition and diversity; Elphidium excavatum clavatum; Elphidium excavatum excavatum; Elphidium gerthi; Elphidium incertum; Entire community; Field observation; Growth/Morphology; Reophax dentaliniformis; Soft-bottom community; Temperate
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
Coverage:
Latitude: 54.531390 * Longitude: 10.211110
Date/Time Start: 2011-04-01T00:00:00 * Date/Time End: 2011-04-30T00:00:00
Minimum Elevation: -13.0 m * Maximum Elevation: -13.0 m
Event(s):
Kiel_fjord * Latitude: 54.531390 * Longitude: 10.211110 * Date/Time Start: 2011-04-01T00:00:00 * Date/Time End: 2011-04-30T00:00:00 * Elevation: -13.0 m * Device: Experiment (EXP)
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 2014-05-27.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1FigureFigHaynert, Kristin
2TableTabHaynert, Kristin
3CommentCommentHaynert, Kristin
4Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmHaynert, Kristin
5SpeciesSpeciesHaynert, Kristin
6Number of specimensNo spec#Haynert, Kristin
7Number of specimens, standard deviationNo spec std dev±Haynert, Kristin
8PercentagePerc%Haynert, Kristinmean
9Incubation durationInc durmonthsHaynert, Kristin
10AbundanceAbund#/cm3Haynert, Kristin
11SizeSizeHaynert, Kristinµm
12PercentagePerc%Haynert, Kristinsize class
13Percentage, standard deviationPerc std dev±Haynert, KristinSize class
14DiameterصmHaynert, Kristinmean
15Diameter, standard deviationØ std dev±Haynert, Kristin
16Calcium carbonate, mass per individualCaCO3 per/indµg/#Haynert, Kristinmean
17Calcium carbonate, mass per individual, standard deviationCaCO3 per/ind std dev±Haynert, Kristin
18AbundanceAbund#/cm3Haynert, Kristinmean
19Abundance, standard deviationAbund std dev±Haynert, Kristin
20MassMassµgHaynert, Kristindifference in mass
21Mass, standard deviationMass std dev±Haynert, Kristindifference in mass
22ReplicatesRepl#Haynert, Kristin
23ReplicateReplicateHaynert, Kristin
24MassMassµgHaynert, Kristintotal
25MassMassµgHaynert, Kristinorganic
26Calcium carbonate, massCaCO3gHaynert, Kristin
27IndividualsInd#Haynert, Kristin
28Calcium carbonate, mass per individualCaCO3 per/indµg/#Haynert, Kristin
29Temperature, waterTemp°CHaynert, Kristin
30Temperature, water, standard deviationTemp std dev±Haynert, Kristin
31SalinitySalHaynert, Kristin
32Salinity, standard deviationSal std dev±Haynert, Kristin
33pHpHHaynert, KristinPotentiometricNBS scale
34pH, standard deviationpH std dev±Haynert, KristinPotentiometricNBS scale
35Carbon, inorganic, dissolvedDICµmol/kgHaynert, KristinCoulometric titration
36Phosphate[PO4]3-µmol/lHaynert, KristinColorimetric
37Phosphate, standard deviationPO4 std dev±Haynert, KristinColorimetric
38SilicateSi(OH)4µmol/lHaynert, KristinColorimetric
39Silicate, standard deviationSi(OH)4 std dev±Haynert, KristinColorimetric
40Alkalinity, totalATµmol/kgHaynert, KristinCalculated using CO2SYS
41Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmHaynert, KristinCalculated using CO2SYS
42Calcite saturation stateOmega CalHaynert, KristinCalculated using CO2SYS
43Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
45Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
48Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
49Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
50Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
51Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
52Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
30268 data points

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