Description: Culturing experiments were performed with the benthic foraminifer Ammonia aomoriensis from Flensburg Fjord, western Baltic Sea. The experiments simulated a projected rise in atmospheric CO2 concentrations. We exposed specimens to 5 seawater pCO2 levels ranging from 618 µatm (pH 7.9) to 3130 µatm (pH 7.2) for 6 wk. Growth rates and mortality differed significantly among pCO2 treatments. The highest increase of mean test diameter (19%) was observed at 618 µatm. At partial pressures >1829 µatm, the mean test diameter was observed to decrease, by up to 22% at 3130 µatm. At pCO2 levels of 618 and 751 µatm, A. aomoriensis tests were found intact after the experiment. The outer chambers of specimens incubated at 929 and 1829 µatm were severely damaged by corrosion. Visual inspection of specimens incubated at 3130 µatm revealed wall dissolution of all outer chambers, only their inner organic lining stayed intact. Our results demonstrate that pCO2 values of >=929 µatm in Baltic Sea waters cause reduced growth of A. aomoriensis and lead to shell dissolution. The bottom waters in Flensburg Fjord and adjacent areas regularly experience pCO2 levels in this range during summer and fall. Increasing atmospheric CO2 concentrations are likely to extend and intensify these periods of undersaturation. This may eventually slow down calcification in A. aomoriensis to the extent that net carbonate precipitation terminates. The possible disappearance of this species from the Baltic Sea and other areas prone to seasonal undersaturation would likely cause significant shifts in shallow-water benthic ecosystems in the near future.
Global identifier:
Doi(
"10.1594/PANGAEA.829879",
)
Measurements(
Measurements {
domain: Unspecified,
station: None,
measured_variables: [
"Species",
"Size fraction",
"Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
"Partial pressure of carbon dioxide, standard deviation",
"Replicates",
"Diameter change",
"Incubation duration",
"Diameter",
"Diameter, standard deviation",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Number of specimens",
"Percentage",
"Salinity",
"Salinity, standard deviation",
"Temperature, water",
"Temperature, water, standard deviation",
"pH, NBS scale",
"pH, standard deviation",
"Alkalinity, total",
"Alkalinity, total, standard deviation",
"Carbon, inorganic, dissolved",
"Carbon, inorganic, dissolved, standard deviation",
"Calcite saturation state",
"Calcite saturation state, standard deviation",
"Phosphate",
"Phosphate, standard deviation",
"Carbonate system computation flag",
"pH, total scale",
"Carbon dioxide",
"Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
"Fugacity of carbon dioxide (water) at sea surface temperature (wet air)",
"Bicarbonate ion",
"Carbonate ion",
"Carbon, inorganic, dissolved",
"Aragonite saturation state",
"Calcite saturation state",
],
methods: [
"Potentiometric",
"Potentiometric",
"Potentiometric titration",
"Potentiometric titration",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
],
},
)
Dataset
Comment: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 by seacarb is 2014-02-24.
Origins: /Wissenschaft/PANGAEA
Tags: Atmosphärische CO2-Konzentration ? Ammoniak ? Muschel ? Blei ? Meerestemperatur ? Meerwasser ? Wassertemperatur ? Benthos ? Bodenwasser ? Kohlendioxid ? Salzgehalt ? Mortalität ? Laborversuch ? Niederschlag ? Gewässer ? Ostsee ? Ammonia aomoriensis ? Bottles or small containers/Aquaria (<20 L) ? Chromista ? Coast and continental shelf ? Foraminifera ? Growth/Morphology ? Heterotrophic prokaryotes ? Mortality/Survival ? Single species ? Temperate ?
Bounding boxes: 9.88448° .. 9.88448° x 54.80137° .. 54.80137°
License: cc-by/3.0
Language: Englisch/English
Modified: 2022-12-15
Time ranges: 2009-06-01 - 2009-06-30
Accessed 1 times.