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Dupont, Sam; Havenhand, Jon N; Thorndyke, William; Peck, Loyd S; Thorndyke, Mike (2008): Seawater carbonate chemistry and morphometric coordinates and morphology of the control 8-arm pluteus of brittlestar Ophiothrix fragilis, 2008. PANGAEA, https://doi.org/10.1594/PANGAEA.758065, Supplement to: Dupont, S et al. (2008): Near-future level of CO2-driven ocean acidification radically affects larval survival and development in the brittlestar Ophiothrix fragilis. Marine Ecology Progress Series, 373, 285-295, https://doi.org/10.3354/meps07800

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Abstract:
The world's oceans are slowly becoming more acidic. In the last 150 yr, the pH of the oceans has dropped by ~0.1 units, which is equivalent to a 25% increase in acidity. Modelling predicts the pH of the oceans to fall by 0.2 to 0.4 units by the year 2100. These changes will have significant effects on marine organisms, especially those with calcareous skeletons such as echinoderms. Little is known about the possible long-term impact of predicted pH changes on marine invertebrate larval development. Here we predict the consequences of increased CO2 (corresponding to pH drops of 0.2 and 0.4 units) on the larval development of the brittlestar Ophiothrix fragilis, which is a keystone species occurring in high densities and stable populations throughout the shelf seas of northwestern Europe (eastern Atlantic). Acidification by 0.2 units induced 100% larval mortality within 8 d while control larvae showed 70% survival over the same period. Exposure to low pH also resulted in a temporal decrease in larval size as well as abnormal development and skeletogenesis (abnormalities, asymmetry, altered skeletal proportions). If oceans continue to acidify as expected, ecosystems of the Atlantic dominated by this keystone species will be seriously threatened with major changes in many key benthic and pelagic ecosystems. Thus, it may be useful to monitor O. fragilis populations and initiate conservation if needed.
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).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SalinitySalDupont, SamMeasured after Sarazin et al 1999
2Temperature, waterTemp°CDupont, SamMeasured after Sarazin et al 1999
3Alkalinity, totalATmmol(eq)/lDupont, SamMeasured after Sarazin et al 1999
4pHpHDupont, SamMeasured after Sarazin et al 1999NBS scale, H+ ion concentration in µmol/l
5Time, incubationT incubationdayDupont, Sam
6Ophiothrix fragilis, body lengthO. fragilis BLmmDupont, SamMeasured using LAS software (Leica)
7Ophiothrix fragilis, body length, standard errorO. fragilis BL std e±Dupont, SamMeasured using LAS software (Leica)
8Ophiothrix fragilis, body rod lengthO. fragilis BRLmmDupont, SamMeasured using LAS software (Leica)
9Ophiothrix fragilis, body rod length, standard errorO. fragilis BRL std e±Dupont, SamMeasured using LAS software (Leica)
10Ophiothrix fragilis, posterolateral rod lengthO. fragilis PLLmmDupont, SamMeasured using LAS software (Leica)
11Ophiothrix fragilis, posterolateral rod length, standard errorO. fragilis PLL std e±Dupont, SamMeasured using LAS software (Leica)
12Ophiothrix fragilis, post-oral rod lengthO. fragilis POLmmDupont, SamMeasured using LAS software (Leica)
13Ophiothrix fragilis, post-oral rod length, standard errorO. fragilis POL std e±Dupont, SamMeasured using LAS software (Leica)
14Ophiothrix fragilis, anterolateral rod lengthO. fragilis ALLmmDupont, SamMeasured using LAS software (Leica)
15Ophiothrix fragilis, anterolateral rod length, standard errorO. fragilis ALL std e±Dupont, SamMeasured using LAS software (Leica)
16Ophiothrix fragilis, post-dorsal rod lengthO. fragilis PDLmmDupont, SamMeasured using LAS software (Leica)
17Ophiothrix fragilis, post-dorsal rod length, standard errorO. fragilis PDL std e±Dupont, SamMeasured using LAS software (Leica)
18Ophiothrix fragilis, Symmetry indexO. fragilis SImmDupont, SamMeasured using LAS software (Leica)
19Ophiothrix fragilis, Symmetry index, standard errorO. fragilis SI std e±Dupont, SamMeasured using LAS software (Leica)
20Alkalinity, totalATµmol/kgDupont, SamCalculated
21Carbon, inorganic, dissolvedDICµmol/kgDupont, SamCalculated using CO2SYS
22Carbonate system computation flagCSC flagNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
23pHpHNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)Total scale, H+ ion concentration in µmol/kg
24Carbon dioxideCO2µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
25Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
26Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
27Bicarbonate ion[HCO3]-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
28Carbonate ion[CO3]2-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
29Aragonite saturation stateOmega ArgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
30Calcite saturation stateOmega CalNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
Size:
714 data points

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