Citation:

228276

Name: Direct effects of increased CO2 concentrations in seawater on the net primary production of charophytes in a shallow, coastal, brackish-water ecosystem
Published: 2015
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Baltic Sea; Benthos; Chara aspera; Chara horrida; Chara tomentosa; Charophyta; Coast and continental shelf; Field experiment; Macroalgae; Mesocosm or benthocosm; Plantae; Primary production/Photosynthesis; Single species; Temperate

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Abstract:

Charophytes are found in fresh and brackish waters across the globe and play key roles in coastal ecosystems. However, their response to increasing CO2 is not well understood. The aim of the study was to detect the effects of elevated CO2 on the physiology of charophyte species growing in the brackish Baltic Sea by measuring net primary production. Mesocosm experiments were conducted in the Kõiguste Bay (N Gulf of Riga) during the field season of 2012. Separate mesocosms were maintained at different pCO2 levels: 2000, 1000 and 200 µatm. The experiments were carried out with three species of charophytes: Chara aspera, C. tomentosa and C. horrida. The short-term photosynthetic responses of charophytes to different treatments were measured by the oxygen method. The results show that elevated CO2 levels in brackish water may enhance the photosynthetic activity of charophyte species and suggest that increasing CO2 in the Baltic Sea could have implications for interspecific competition and community structure in a future high CO2 world.

Keyword(s):

Baltic Sea; Benthos; Chara aspera; Chara horrida; Chara tomentosa; Charophyta; Coast and continental shelf; Field experiment; Macroalgae; Mesocosm or benthocosm; Plantae; 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 3.0.8. https://cran.r-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: 58.307000 * Longitude: 23.122000

Date/Time Start: 2012-06-26T00:00:00 * Date/Time End: 2012-07-04T00:00:00

Event(s):

Väike_strait * Latitude: 58.307000 * Longitude: 23.122000 * Date/Time Start: 2012-06-26T00:00:00 * Date/Time End: 2012-07-04T00:00:00 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 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 2016-06-06.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Pajusalu, Liina		study
2	Species	Species		Pajusalu, Liina
3	Registration number of species	Reg spec no		Pajusalu, Liina
4	Uniform resource locator/link to reference	URL ref		Pajusalu, Liina		WoRMS Aphia ID
5	Treatment	Treat		Pajusalu, Liina
6	Identification	ID		Pajusalu, Liina		label
7	Net primary production of oxygen	NPP O2	mg/g/h	Pajusalu, Liina
8	Salinity	Sal		Pajusalu, Liina
9	Temperature, water	Temp	°C	Pajusalu, Liina
10	pH	pH		Pajusalu, Liina		NBS scale
11	Bicarbonate ion	[HCO3]-	µmol/kg	Pajusalu, Liina
12	Carbonate ion	[CO3]2-	µmol/kg	Pajusalu, Liina
13	Carbon, inorganic, dissolved	DIC	µmol/kg	Pajusalu, Liina
14	Alkalinity, total	AT	µmol/kg	Pajusalu, Liina
15	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
16	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
17	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
18	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)
19	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)
20	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
21	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
22	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
23	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)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

201 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Type (study)	2 Species	3 Reg spec no	4 URL ref (WoRMS Aphia ID)	5 Treat	6 ID (label)	7 NPP O2 [mg/g/h]	8 Sal	9 Temp [°C]	10 pH (NBS scale)	11 [HCO3]- [µmol/kg]	12 [CO3]2- [µmol/kg]	13 DIC [µmol/kg]	14 AT [µmol/kg]	15 CSC flag	16 pH (total scale)	17 CO2 [µmol/kg]	18 fCO2water_SST_wet [µatm]	19 pCO2water_SST_wet [µatm]	20 [HCO3]- [µmol/kg]	21 [CO3]2- [µmol/kg]	22 Omega Arg	23 Omega Cal
laboratory	Chara tomentosa (Charophytes)			Control	Mesocosm 1	3.16	5.6	16	8.80	2940.2	323.6	3271.8	3615.2	15	8.56	10.99	256.73	257.65	2927.99	332.82	5.38	9.65
laboratory	Chara tomentosa (Charophytes)			elevated pCO2 level 1000 µatm	Mesocosm 2	4.65	5.6	16	8.05	2614.3	51.2	2705.7	2722.9	15	7.87	48.04	1122.36	1126.38	2597.73	59.92	0.97	1.74
laboratory	Chara tomentosa (Charophytes)			elevated pCO2 level 2000 µatm	Mesocosm 3	4.54	5.6	16	7.70	2335.5	20.4	2436.4	2379.2	15	7.56	86.51	2021.10	2028.35	2323.27	26.62	0.43	0.77
laboratory	Chara horrida (Charophytes)	399470	marinespecies.org	Control	Mesocosm 1	3.21	5.6	16	8.80	2940.2	323.6	3271.8	3615.2	15	8.56	10.99	256.73	257.65	2927.99	332.82	5.38	9.65
laboratory	Chara horrida (Charophytes)	399470	marinespecies.org	elevated pCO2 level 1000 µatm	Mesocosm 2	3.23	5.6	16	8.05	2614.3	51.2	2705.7	2722.9	15	7.87	48.04	1122.36	1126.38	2597.73	59.92	0.97	1.74
laboratory	Chara horrida (Charophytes)	399470	marinespecies.org	elevated pCO2 level 2000 µatm	Mesocosm 3	4.37	5.6	16	7.70	2335.5	20.4	2436.4	2379.2	15	7.56	86.51	2021.10	2028.35	2323.27	26.62	0.43	0.77
laboratory	Chara aspera (Charophytes)	399466	marinespecies.org	Control	Mesocosm 1	1.75	5.6	16	8.80	2940.2	323.6	3271.8	3615.2	15	8.56	10.99	256.73	257.65	2927.99	332.82	5.38	9.65
laboratory	Chara aspera (Charophytes)	399466	marinespecies.org	elevated pCO2 level 1000 µatm	Mesocosm 2	1.85	5.6	16	8.05	2614.3	51.2	2705.7	2722.9	15	7.87	48.04	1122.36	1126.38	2597.73	59.92	0.97	1.74
laboratory	Chara aspera (Charophytes)	399466	marinespecies.org	elevated pCO2 level 2000 µatm	Mesocosm 3	2.42	5.6	16	7.70	2335.5	20.4	2436.4	2379.2	15	7.56	86.51	2021.10	2028.35	2323.27	26.62	0.43	0.77