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Ho, Maureen; Carpenter, Robert C (2017): Seawater carbonate chemistry and growth of tropical marine macroalgae [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.908485, Supplement to: Ho, M; Carpenter, RC (2017): Differential growth responses to water flow and reduced pH in tropical marine macroalgae. Journal of Experimental Marine Biology and Ecology, 491, 58-65, https://doi.org/10.1016/j.jembe.2017.03.009

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Abstract:
The physical environment plays a key role in facilitating the transfer of nutrients and dissolved gases to marine organisms and can alter the rate of delivery of dissolved inorganic carbon. For non-calcifying macroalgae, water motion can influence the physiological and ecological responses to various environmental changes such as ocean acidification (OA). We tested the effects of lowered pH under three different flow speeds on three dominant non-calcifying macroalgal species differing in their carbon-use and are commonly found in the back reefs of Moorea, French Polynesia. Relative growth rates (RGR) of two phaeophytes, Dictyota bartayresiana and Lobophora variegata (HCO3− users), and a rhodophyte, Amansia rhodantha (CO2 user) were measured to examine how the combined effects of OA and flow can affect algal growth. Growth rates were affected independently by pCO2 and flow treatments but there was no significant interactive effect. Additionally, growth rates among species varied within the different flow regimes. Of the three species, L. variegata had the overall greatest increase in RGR across all three flow speeds while A. rhodantha exhibited the greatest negative impact under elevated pCO2 at 0.1 cm/s. These differential responses among algal species demonstrate the importance of flow when examining responses to a changing environment, and if the responses of macroalgae differ based on their carbon-use strategies, it may provide advantages to some macroalgal species in a future, more acidic ocean.
Keyword(s):
Amansia rhodantha; Benthos; Chromista; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Dictyota bartayresiana; Growth/Morphology; Laboratory experiment; Lobophora variegata; Macroalgae; Ochrophyta; Other; Rhodophyta; Single species; South Pacific; Tropical
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)
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 2019-11-08.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeHo, Maureenstudy
2SpeciesSpeciesHo, Maureen
3Registration number of speciesReg spec noHo, Maureen
4Uniform resource locator/link to referenceURL refHo, MaureenWoRMS Aphia ID
5TreatmentTreatHo, Maureenflow speed
6IdentificationIDHo, Maureen
7TreatmentTreatHo, Maureen
8Growth rateµ%/dayHo, Maureenrelative
9Temperature, waterTemp°CHo, Maureen
10SalinitySalHo, Maureen
11pHpHHo, MaureenPotentiometrictotal scale
12pH, standard errorpH std e±Ho, MaureenPotentiometrictotal scale
13Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmHo, MaureenCalculated using seacarb
14Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard errorpCO2water_SST_wet std e±Ho, MaureenCalculated using seacarb
15Alkalinity, totalATµmol/kgHo, MaureenPotentiometric titration
16Alkalinity, total, standard errorAT std e±Ho, MaureenPotentiometric titration
17Bicarbonate ion[HCO3]-µmol/kgHo, MaureenCalculated using seacarb
18Bicarbonate ion, standard error[HCO3]- std e±Ho, MaureenCalculated using seacarb
19Carbon dioxideCO2µmol/kgHo, MaureenCalculated using seacarb
20Carbon dioxide, standard errorCO2 std e±Ho, MaureenCalculated using seacarb
21Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
22Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
23Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
24Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
25Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
26Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
27Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
28Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
29Calcite 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:
10440 data points

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