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PANGAEA.
Data Publisher for Earth & Environmental Science

Comeau, Steeve; Jeffree, Ross; Teyssié, Jean-Louis; Gattuso, Jean-Pierre (2009): Seawater carbonate chemistry in Kongsfjorden, Svalbard, May 2009. PANGAEA, https://doi.org/10.1594/PANGAEA.744718, In: EPOCA Arctic experiment 2009 team (2009): EPOCA 2009 Svalbard benthic experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.745083

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Abstract:
Thecosome pteropods (pelagic mollusks) can play a key role in the food web of various marine ecosystems. They are a food source for zooplankton or higher predators such as fishes, whales and birds that is particularly important in high latitude areas. Since they harbor a highly soluble aragonitic shell, they could be very sensitive to ocean acidification driven by the increase of anthropogenic CO2 emissions. The effect of changes in the seawater chemistry was investigated on Limacina helicina, a key species of Arctic pelagic ecosystems. Individuals were kept in the laboratory under controlled pCO2 levels of 280, 380, 550, 760 and 1020 µatm and at control (0°C) and elevated (4°C) temperatures. The respiration rate was unaffected by pCO2 at control temperature, but significantly increased as a function of the pCO2 level at elevated temperature. pCO2 had no effect on the gut clearance rate at either temperature. Precipitation of CaCO3, measured as the incorporation of 45Ca, significantly declined as a function of pCO2 at both temperatures. The decrease in calcium carbonate precipitation was highly correlated to the aragonite saturation state. Even though this study demonstrates that pteropods are able to precipitate calcium carbonate at low aragonite saturation state, the results support the current concern for the future of Arctic pteropods, as the production of their shell appears to be very sensitive to decreased pH. A decline of pteropod populations would likely cause dramatic changes to various pelagic ecosystems.
Related to:
Comeau, Steeve; Jeffree, Ross; Teyssié, Jean-Louis; Gattuso, Jean-Pierre (2010): Response of the Arctic pteropod Limacina helicina to projected future environmental conditions. PLoS ONE, 5(6), e11362, https://doi.org/10.1371/journal.pone.0011362
Coverage:
Median Latitude: 78.950000 * Median Longitude: 11.985000 * South-bound Latitude: 78.940000 * West-bound Longitude: 11.900000 * North-bound Latitude: 78.960000 * East-bound Longitude: 12.070000
Date/Time Start: 2009-05-17T00:00:00 * Date/Time End: 2009-06-02T00:00:00
Minimum DEPTH, water: m * Maximum DEPTH, water: m
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DATE/TIMEDate/TimeGeocode
2LATITUDELatitudeGeocode
3LONGITUDELongitudeGeocode
4DEPTH, waterDepth watermGeocode
5SalinitySalComeau, Steeve
6Temperature, waterTemp°CComeau, Steeve
7Alkalinity, totalATµmol/kgComeau, Steeve
8Carbon, inorganic, dissolvedDICµmol/kgComeau, Steeve
9Carbonate system computation flagCSC flagNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
10pHpHNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)Total scale
11Carbon dioxideCO2µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
12Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
13Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
14Bicarbonate ion[HCO3]-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
15Carbonate ion[CO3]2-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
16Aragonite saturation stateOmega ArgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
17Calcite saturation stateOmega CalNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
Size:
104 data points

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