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Ziveri, Patrizia; Passaro, Marcello; Incarbona, Alessandro; Milazzo, Marco; Rodolfo-Metalpa, Riccardo; Hall-Spencer, Jason M (2014): Decline in Coccolithophore Diversity and Impact on Coccolith Morphogenesis Along a Natural CO2 Gradient [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.838830, Supplement to: Ziveri, P et al. (2014): Decline in Coccolithophore Diversity and Impact on Coccolith Morphogenesis Along a Natural CO2 Gradient. Biological Bulletin, 226(3), 282-290, https://doi.org/10.1086/BBLv226n3p282

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Abstract:
A natural pH gradient caused by marine CO2 seeps off Vulcano Island (Italy) was used to assess the effects of ocean acidification on coccolithophores, which are abundant planktonic unicellular calcifiers. Such seeps are used as natural laboratories to study the effects of ocean acidification on marine ecosystems, since they cause long-term changes in seawater carbonate chemistry and pH, exposing the organisms to elevated CO2 concentrations and therefore mimicking future scenarios. Previous work at CO2 seeps has focused exclusively on benthic organisms. Here we show progressive depletion of 27 coccolithophore species, in terms of cell concentrations and diversity, along a calcite saturation gradient from Omega calcite 6.4 to <1. Water collected close to the main CO2 seeps had the highest concentrations of malformed Emiliania huxleyi. These observations add to a growing body of evidence that ocean acidification may benefit some algae but will likely cause marine biodiversity loss, especially by impacting calcifying species, which are affected as carbonate saturation falls.
Keyword(s):
Biomass/Abundance/Elemental composition; CO2 vent; Coast and continental shelf; Community composition and diversity; Entire community; Field observation; Growth/Morphology; Mediterranean Sea; Pelagos; Phytoplankton; Temperate
Further details:
Lavigne, Héloïse; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0 [webpage]. https://cran.r-project.org/package=seacarb
Funding:
Seventh Framework Programme (FP7), grant/award no. 265103: Mediterranean Sea Acidification in a Changing Climate
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 2014-11-12.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample IDSample IDZiveri, Patrizia
2Temperature, waterTemp°CZiveri, Patrizia
3SalinitySalZiveri, Patrizia
4pHpHZiveri, PatriziaPotentiometrictotal scale
5Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmZiveri, PatriziaCalculated using CO2SYS
6Alkalinity, totalATµmol/kgZiveri, PatriziaPotentiometric titration
7Calcite saturation stateOmega CalZiveri, PatriziaCalculated using CO2SYS
8CoccospheresCoccosp#/lZiveri, Patrizia
9Number of speciesSpec No#Ziveri, Patrizia
10Coccospheres, malformedCoccosp malformed%Ziveri, PatriziaEmiliana huxleyi
11Coccospheres, corrodedCoccosp corroded%Ziveri, PatriziaEmiliana huxleyi
12Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
13Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
14Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
15Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
16Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
17Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
18Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
19Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
20Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
292 data points

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