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Martin, Sophie; Cohu, Stéphanie; Vignot, Céline; Zimmerman, Guillaume; Gattuso, Jean-Pierre (2013): Seawater carbonate chemistry and physiological response of the Mediterranean crustose coralline alga Lithophyllum cabiochae to elevated pCO2 and temperature. doi:10.1594/PANGAEA.823320, Supplement to: Martin, S et al. (2013): One-year experiment on the physiological response of the Mediterranean crustose coralline alga, Lithophyllum cabiochae, to elevated pCO2 and temperature. Ecology and Evolution, 3(3), 676-693, doi:10.1002/ece3.475

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Abstract:
The response of respiration, photosynthesis, and calcification to elevated pCO2 and temperature was investigated in isolation and in combination in the Mediterranean crustose coralline alga Lithophyllum cabiochae. Algae were maintained in aquaria during 1 year at near-ambient conditions of irradiance, at ambient or elevated temperature (+3 °C), and at ambient (ca. 400 µatm) or elevated pCO2 (ca. 700 µatm). Respiration, photosynthesis, and net calcification showed a strong seasonal pattern following the seasonal variations of temperature and irradiance, with higher rates in summer than in winter. Respiration was unaffected by pCO2 but showed a general trend of increase at elevated temperature at all seasons, except in summer under elevated pCO2. Conversely, photosynthesis was strongly affected by pCO2 with a decline under elevated pCO2 in summer, autumn, and winter. In particular, photosynthetic efficiency was reduced under elevated pCO2. Net calcification showed different responses depending on the season. In summer, net calcification increased with rising temperature under ambient pCO2 but decreased with rising temperature under elevated pCO2. Surprisingly, the highest rates in summer were found under elevated pCO2 and ambient temperature. In autumn, winter, and spring, net calcification exhibited a positive or no response at elevated temperature but was unaffected by pCO2. The rate of calcification of L. cabiochae was thus maintained or even enhanced under increased pCO2. However, there is likely a trade-off with other physiological processes. For example, photosynthesis declines in response to increased pCO2 under ambient irradiance. The present study reports only on the physiological response of healthy specimens to ocean warming and acidification, however, these environmental changes may affect the vulnerability of coralline algae to other stresses such as pathogens and necroses that can cause major dissolution, which would have critical consequence for the sustainability of coralligenous habitats and the budgets of carbon and calcium carbonate in coastal Mediterranean ecosystems.
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
Coverage:
Latitude: 43.678830 * Longitude: 7.323170
Date/Time Start: 2006-07-10T00:00:00 * Date/Time End: 2007-07-10T00:00:00
Minimum Elevation: -25.0 m * Maximum Elevation: -25.0 m
Event(s):
Villefranche * Latitude: 43.678830 * Longitude: 7.323170 * Date/Time Start: 2006-07-10T00:00:00 * Date/Time End: 2007-07-10T00:00:00 * Elevation: -25.0 m * Location: Mediterranean Sea * Device: Experiment (EXP)
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 2013-11-27.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesMartin, Sophie
2IdentificationIDMartin, Sophie
3TreatmentTreatMartin, Sophie
4SeasonSeasonMartin, Sophie
5IrradianceEµE/m2/sMartin, Sophie
6Respiration rate, oxygenResp O2µmol/cm2/hMartin, Sophie
7Respiration rate, oxygen, standard errorResp O2 std e±Martin, Sophie
8Respiration rate, carbon dioxideResp CO2µmol/cm2/hMartin, Sophie
9Respiration rate, carbon dioxide, standard errorResp CO2 std e±Martin, Sophie
10Gross photosynthesis rate, oxygenPG O2µmol/cm2/hMartin, Sophie
11Gross photosynthesis rate, oxygen, standard errorPG O2 std e±Martin, Sophie
12Gross photosynthesis rate, carbon dioxidePG CO2µmol/cm2/hMartin, Sophie
13Gross photosynthesis rate, carbon dioxide, standard errorPG CO2 std e±Martin, Sophie
14Gross calcification rate of calcium carbonateGC CaCO3µmol/cm2/hMartin, SophieAlkalinity anomaly technique (Smith and Key, 1975)
15Gross calcification rate of calcium carbonate, standard errorGC CaCO3 std e±Martin, SophieAlkalinity anomaly technique (Smith and Key, 1975)
16Net photosynthesis rate, oxygenPN O2µmol/cm2/hMartin, Sophie
17Net photosynthesis rate, oxygen, standard errorPN O2 std e±Martin, Sophie
18Net photosynthesis rate, carbon dioxidePN CO2µmol/cm2/hMartin, Sophie
19Net photosynthesis rate, carbon dioxide, standard errorPN CO2 std e±Martin, Sophie
20Net calcification rate of calcium carbonateNC CaCO3µmol/cm2/hMartin, SophieAlkalinity anomaly technique (Smith and Key, 1975)
21Net calcification rate of calcium carbonate, standard errorNC CaCO3 std e±Martin, SophieAlkalinity anomaly technique (Smith and Key, 1975)
22SalinitySalMartin, Sophie
23Temperature, waterTemp°CMartin, Sophie
24Alkalinity, totalATµmol/kgMartin, Sophie
25Alkalinity, total, standard errorAT std e±Martin, Sophie
26pHpHMartin, Sophietotal scale
27Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmMartin, SophieCalculated using seacarb
28Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard errorpCO2water_SST_wet std e±Martin, SophieCalculated using seacarb
29Carbon dioxideCO2µmol/kgMartin, SophieCalculated using seacarb
30Carbon dioxide, standard errorCO2 std e±Martin, SophieCalculated using seacarb
31Bicarbonate ion[HCO3]-µmol/kgMartin, SophieCalculated using seacarb
32Bicarbonate ion, standard error[HCO3]- std e±Martin, SophieCalculated using seacarb
33Carbonate ion[CO3]2-µmol/kgMartin, SophieCalculated using seacarb
34Carbonate ion, standard error[CO3]2- std e±Martin, SophieCalculated using seacarb
35Carbon, inorganic, dissolvedDICµmol/kgMartin, SophieCalculated using seacarb
36Carbon, inorganic, dissolved, standard deviationDIC std dev±Martin, SophieCalculated using seacarb
37Calcite saturation stateOmega CalMartin, SophieCalculated using seacarb
38Calcite saturation state, standard deviationOmega Cal std dev±Martin, SophieCalculated using seacarb
39Aragonite saturation stateOmega ArgMartin, SophieCalculated using seacarb
40Aragonite saturation state, standard errorOmega Arg std e±Martin, SophieCalculated using seacarb
41Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
48Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
49Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
14036 data points

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