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Fabricius, Katharina Elisabeth; Langdon, Chris; Uthicke, Sven; Humphrey, Craig; Noonan, Sam; De'ath, Glenn; Okazaki, Remy; Muehllehner, Nancy; Glas, Martin S; Lough, Janice M (2011): Physiological and ecological variables measured at the high and low pCO2 reef sections. PANGAEA, https://doi.org/10.1594/PANGAEA.821559, Supplement to: Fabricius, KE et al. (2011): Losers and winners in coral reefs acclimatized to elevated carbon dioxide concentrations. Nature Climate Change, 1(3), 165-169, https://doi.org/10.1038/nclimate1122

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Abstract:
Experiments have shown that ocean acidification due to rising atmospheric carbon dioxide concentrations has deleterious effects on the performance of many marine organisms. However, few empirical or modelling studies have addressed the long-term consequences of ocean acidification for marine ecosystems. Here we show that as pH declines from 8.1 to 7.8 (the change expected if atmospheric carbon dioxide concentrations increase from 390 to 750 ppm, consistent with some scenarios for the end of this century) some organisms benefit, but many more lose out. We investigated coral reefs, seagrasses and sediments that are acclimatized to low pH at three cool and shallow volcanic carbon dioxide seeps in Papua New Guinea. At reduced pH, we observed reductions in coral diversity, recruitment and abundances of structurally complex framework builders, and shifts in competitive interactions between taxa. However, coral cover remained constant between pH 8.1 and ~7.8, because massive Porites corals established dominance over structural corals, despite low rates of calcification. Reef development ceased below pH 7.7. Our empirical data from this unique field setting confirm model predictions that ocean acidification, together with temperature stress, will probably lead to severely reduced diversity, structural complexity and resilience of Indo-Pacific coral reefs within this century.
Keyword(s):
Benthos; Calcification/Dissolution; CO2 vent; Coast and continental shelf; Community composition and diversity; Entire community; Field observation; Growth/Morphology; Rocky-shore community; South Pacific; Tropical
Further details:
Lavigne, Héloise; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb
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 2013-10-17.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DescriptionDescriptionFabricius, Katharina Elisabeth
2TreatmentTreatFabricius, Katharina Elisabeth
3CoverageCov%Fabricius, Katharina Elisabeth
4Species richnessSFabricius, Katharina Elisabethtaxa/transect
5Areal densityAreal den#/m2Fabricius, Katharina Elisabeth
6Linear extensionLin extcm/aFabricius, Katharina Elisabeth
7Density, skeletal bulkDensity bg/cm3Fabricius, Katharina Elisabeth
8Calcification rate of calcium carbonateCalc rate CaCO3g/cm2/aFabricius, Katharina Elisabeth
9ThicknessThickmmFabricius, Katharina Elisabethtissue
10Pigmentation, color chart scorePigmentation color chart scoreFabricius, Katharina Elisabeth
11Growth rateµmm/dayFabricius, Katharina Elisabeth
12BiomassBiomg/m2Fabricius, Katharina Elisabeth
13Species richnessSFabricius, Katharina Elisabeth#/plot
14Shannon Diversity IndexH'Fabricius, Katharina Elisabeth#/plot
15EpibiontsEpibionts%Fabricius, Katharina Elisabeth
16ForaminiferaForam#/m2Fabricius, Katharina Elisabethepibiotic foraminifera
17Carbon, inorganic, totalTIC%Fabricius, Katharina Elisabeth
18Nitrogen, total particulateTPN%Fabricius, Katharina Elisabeth
19Carbon, organic, totalTOC%Fabricius, Katharina Elisabeth
20Density, faunalDensity#/gFabricius, Katharina Elisabeth
21Species richnessSFabricius, Katharina Elisabethtaxa/g
22Temperature, waterTemp°CFabricius, Katharina Elisabeth
23SalinitySalFabricius, Katharina Elisabeth
24Alkalinity, totalATµmol/kgFabricius, Katharina ElisabethPotentiometric titration
25Carbon, inorganic, dissolvedDICµmol/kgFabricius, Katharina ElisabethCoulometric titration
26Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmFabricius, Katharina ElisabethCalculated using CO2SYS
27pHpHFabricius, Katharina ElisabethPotentiometric
28Aragonite saturation stateOmega ArgFabricius, Katharina ElisabethCalculated using CO2SYS
29Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
30pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
31Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
32Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
33Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
34Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
35Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
37Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
760 data points

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