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Cornwall, Christopher Edward; Hurd, Catriona L (2019): Seawater carbonate chemistry and photosynthetic rates of macroalgae [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.912280, Supplement to: Cornwall, CE; Hurd, CL (2019): Variability in the benefits of ocean acidification to photosynthetic rates of macroalgae without CO2-concentrating mechanisms. Marine and Freshwater Research, https://doi.org/10.1071/MF19134

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Published: 2019 (exact date unknown) • DOI registered: 2020-03-21

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Abstract:
Increasing concentrations of surface-seawater carbon dioxide (CO2) (ocean acidification) could favour seaweed species that currently are limited for dissolved inorganic carbon (DIC). Among them, those that are unable to use CO2-concentrating mechanisms (CCMs) to actively uptake bicarbonate (HCO3–) across the plasmalemma are most likely to benefit. Here, we assess how the DIC uptake and photosynthetic rates of three rhodophytes without CCMs respond to four seawater CO2 concentrations representing pre-industrial (280 μatm), present-day (400 μatm), representative concentration pathway (RCP) emissions scenario 8.5 2050 (650 μatm) and RCP 8.5 2100 (1000 μatm). We demonstrated that the photosynthetic rates of only one species increase between the preindustrial and end-of-century scenarios, but because of differing photosynthetic quotients (DIC taken up relative to O2 evolved), all three increase their DIC uptake rates from pre-industrial or present-day scenarios to the end-of-century scenario. These variable, but generally beneficial, responses highlight that not all species without CCMs will respond to ocean acidification uniformly. This supports past assessments that, on average, this group will likely benefit from the impacts of ocean acidification. However, more concerted efforts are now required to assess whether similar benefits to photosynthetic rates and DIC uptake are also observed in chlorophytes and ochrophytes without CCMs.
Keyword(s):
Benthos; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Heminuera frondosa; Laboratory experiment; Macroalgae; Plantae; Plocamium angustum; Primary production/Photosynthesis; Rhodophyta; Rhodymenia sp.; Single species; South Pacific; Temperate
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2019): seacarb: seawater carbonate chemistry with R. R package version 3.2.12. https://CRAN.R-project.org/package=seacarb
Project(s):
Ocean Acidification International Coordination Centre (OA-ICC)
Coverage:
Latitude: -43.058852 * Longitude: 147.333442
Date/Time Start: 2015-01-24T00:00:00 * Date/Time End: 2015-01-24T00:00:00
Event(s):
Tinderbox * Latitude: -43.058852 * Longitude: 147.333442 * Date/Time: 2015-01-24T00:00:00 * Method/Device: Experiment (EXP)
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) 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 2020-02-17.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeCornwall, Christopher Edwardstudy
2SpeciesSpeciesCornwall, Christopher Edward
3Registration number of speciesReg spec noCornwall, Christopher Edward
4Uniform resource locator/link to referenceURL refCornwall, Christopher EdwardWoRMS Aphia ID
5TreatmentTreatCornwall, Christopher Edward
6Photosynthetic rate, oxygen, per dry massPs oxygen/dmµmol/kg/g/hCornwall, Christopher Edward
7Photosynthetic quotientPQCornwall, Christopher Edward
8Dissolved inorganic carbon uptake rateDIC upt rateµmol/kg/g/hCornwall, Christopher Edward
9Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmCornwall, Christopher Edward
10Temperature, waterTemp°CCornwall, Christopher Edward
11SalinitySalCornwall, Christopher Edward
12pH, total scalepHTCornwall, Christopher Edwardtotal scale, initial
13pH, standard deviationpH std dev±Cornwall, Christopher Edwardtotal scale, initial
14pH, total scalepHTCornwall, Christopher Edwardtotal scale, final
15pH, standard deviationpH std dev±Cornwall, Christopher Edwardtotal scale, final
16Alkalinity, totalATµmol/kgCornwall, Christopher Edward
17Alkalinity, total, standard deviationAT std dev±Cornwall, Christopher Edward
18Carbon, inorganic, dissolvedDICµmol/kgCornwall, Christopher Edward
19Carbon, inorganic, dissolved, standard deviationDIC std dev±Cornwall, Christopher Edward
20Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmCornwall, Christopher Edward
21Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Cornwall, Christopher Edward
22Carbon dioxideCO2µmol/kgCornwall, Christopher Edward
23Carbon dioxide, standard deviationCO2 std dev±Cornwall, Christopher Edward
24Bicarbonate ion[HCO3]-µmol/kgCornwall, Christopher Edward
25Bicarbonate ion, standard deviation[HCO3]- std dev±Cornwall, Christopher Edward
26Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
27Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
28Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
29Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
30Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
31Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
32Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
33Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
34Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2400 data points

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