Citation:

diss_mods_00010109

Name: Elevated pCO2 from late summer coastal upwellings in the western Baltic Sea enhances vegetative growth in the brown algae Fucus serratus: a laboratory assessment
Creator: Vincent Saderne
Published: 2012
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Baltic Sea; Benthos; Biomass/Abundance/Elemental composition; Chromista; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Fucus serratus; Growth/Morphology; Laboratory experiment; Macroalgae; Ochrophyta; Primary production/Photosynthesis; Single species; Temperate

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Abstract:

The brown algae Fucus serratus is one of the major meadow forming algae of the Western Baltic Sea nearshore ecosystem. At the end of summer, those meadows are exposed to local upwelling suddenly increasing the pCO2 and DIC up to 2500 µatm and 2250 µmol/kg resp., for period of days to weeks. This study investigates the growth response of summer's vegetative Fucus serratus to elevated pCO2 (1350 and 4080 µatm) during a 40 days laboratory incubation. After 10 days, increases of growth rates of 20 % and 47 % of the control were observed in the 1350 and 4080 µatm pCO2 treatments respectively. Beyond 20 days, the growth rates collapsed in all treatments due to nutrients shortage, as demonstrated by high C:N ratios (95:1) and low N tissue content (0.04 % of dry weight). The collapse occurs faster at higher pCO2. On day 30, growth rates were reduced by 40 % and 100 % relative to the control at 1350 and 4080 µatm respectively. These results are consistent with a fertilizing effect of elevated pCO2 on Fucus serratus presumably linked to the transition from active HCO3- to passive CO2(aq) uptake. This positive effect is limited by nutrients resources, low seawater dissolved inorganic N and P and shortage of the nutrients reserves accumulated over the previous autumn and winter.

Keyword(s):

Baltic Sea; Benthos; Biomass/Abundance/Elemental composition; Chromista; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Fucus serratus; Growth/Morphology; Laboratory experiment; Macroalgae; Ochrophyta; Primary production/Photosynthesis; Single species; Temperate

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse (2015): seacarb: seawater carbonate chemistry with R. R package version 3.0.6. https://cran.r-project.org/package=seacarb

Coverage:

Latitude: 54.450000 * Longitude: 9.883330

Date/Time Start: 2011-02-01T00:00:00 * Date/Time End: 2011-02-28T00:00:00

Minimum Elevation: -2.0 m * Maximum Elevation: 0.0 m

Event(s):

Eckernforder_Bay_OA * Latitude: 54.450000 * Longitude: 9.883330 * Date/Time Start: 2011-02-01T00:00:00 * Date/Time End: 2011-02-28T00:00:00 * Elevation Start: 0.0 m * Elevation End: -2.0 m * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 2015-06-01.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Saderne, Vincent
2	Treatment	Treat		Saderne, Vincent		pCO2 (µatm)
3	Time of day	Time of day		Saderne, Vincent
4	Replicate	Repl		Saderne, Vincent
5	Growth rate	µ	%/day	Saderne, Vincent		per bottle
6	Duration, number of days	Duration	days	Saderne, Vincent
7	Area	Area	cm²	Saderne, Vincent		thallus area
8	Effective photochemical quantum yield	phi PS II		Saderne, Vincent
9	Effective photochemical quantum yield, standard deviation	phi PS II std dev	±	Saderne, Vincent
10	Carbon, total	TC	%	Saderne, Vincent
11	Nitrogen, total	TN	%	Saderne, Vincent
12	Carbon/Nitrogen ratio	C/N		Saderne, Vincent
13	Temperature, water	Temp	°C	Saderne, Vincent
14	Temperature, water, standard deviation	Temp std dev	±	Saderne, Vincent
15	Salinity	Sal		Saderne, Vincent
16	Salinity, standard deviation	Sal std dev	±	Saderne, Vincent
17	pH	pH		Saderne, Vincent	Potentiometric	total scale
18	pH, standard deviation	pH std dev	±	Saderne, Vincent	Potentiometric	total scale
19	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Saderne, Vincent
20	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Saderne, Vincent
21	Carbon, inorganic, dissolved	DIC	µmol/kg	Saderne, Vincent	Coulometric titration
22	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Saderne, Vincent	Coulometric titration
23	Alkalinity, total	AT	µmol/kg	Saderne, Vincent
24	Alkalinity, total, standard deviation	AT std dev	±	Saderne, Vincent
25	Carbon dioxide	CO2	µmol/kg	Saderne, Vincent
26	Carbon dioxide, standard deviation	CO2 std dev	±	Saderne, Vincent
27	Bicarbonate ion	[HCO3]-	µmol/kg	Saderne, Vincent
28	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Saderne, Vincent
29	Carbonate ion	[CO3]2-	µmol/kg	Saderne, Vincent
30	Carbonate ion, standard deviation	[CO3]2- std dev	±	Saderne, Vincent
31	Nitrogen, inorganic	N inorg	µmol/kg	Saderne, Vincent
32	Nitrogen, inorganic, standard deviation	N inorg std dev	±	Saderne, Vincent
33	Phosphate	PHSPHT	µmol/kg	Saderne, Vincent
34	Phosphate, standard deviation	[PO4]3- std dev	±	Saderne, Vincent
35	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
41	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
42	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
43	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

8188 data points

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