Citation:

fmars.2016.00239

Name: Seawater carbonate chemistry and net photosynthesis of seagrass Zostera marina in a brackish water environment
Published: 2016
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Baltic Sea; Benthos; Coast and continental shelf; Field experiment; Light; Mesocosm or benthocosm; Plantae; Primary production/Photosynthesis; Seagrass; Single species; Temperate; Temperature; Tracheophyta; Zostera marina

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Abstract:

Seagrasses are distributed across the globe and their communities may play key roles in the coastal ecosystems. Seagrass meadows are expected to benefit from the increased carbon availability which might be used in photosynthesis in a future high CO2 world. The main aim of this study was to examine the effect of elevated pCO2 on the net photosynthesis of seagrass Zostera marina in a brackish water environment. The short-term mesocosm experiments were conducted in Kõiguste Bay (northern part of Gulf of Riga, the Baltic Sea) in June-July 2013 and 2014. As the levels of pCO2 naturally range from ca. 150 µatm to well above 1000 µatm under summer conditions in Kõiguste Bay we chose to operate in mesocosms with the pCO2 levels of ca. 2000, ca. 1000, and ca. 200 µatm. Additionally, in 2014 the photosynthesis of Z. marina was measured outside of the mesocosm in the natural conditions. In the shallow coastal Baltic Sea seagrass Z. marina lives in a highly variable environment due to seasonality and rapid changes in meteorological conditions. This was demonstrated by the remarkable differences in water temperatures between experimental years of ca. 8°C. Thus, the current study also investigated the effect of elevated pCO2 in combination with short-term natural fluctuations of environmental factors, i.e., temperature and PAR on the photosynthesis of Z. marina. Our results show that elevated pCO2 alone did not enhance the photosynthesis of the seagrass. The photosynthetic response of Z. marina to CO2 enrichment was affected by changes in water temperature and light availability.

Keyword(s):

Baltic Sea; Benthos; Coast and continental shelf; Field experiment; Light; Mesocosm or benthocosm; Plantae; Primary production/Photosynthesis; Seagrass; Single species; Temperate; Temperature; Tracheophyta; Zostera marina

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. https://cran.r-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: 58.533000 * Longitude: 22.238000

Date/Time Start: 2013-07-18T00:00:00 * Date/Time End: 2014-07-26T00:00:00

Event(s):

Kudema_Bay * Latitude: 58.533000 * Longitude: 22.238000 * Date/Time Start: 2013-07-18T00:00:00 * Date/Time End: 2014-07-26T00:00:00 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) 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 2017-08-22.

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	Experiment duration	Exp duration	days	Pajusalu, Liina
6	Experiment	Exp		Pajusalu, Liina
7	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Pajusalu, Liina		Treatment
8	Net photosynthesis rate, oxygen	PN O2	µg/mg/h	Pajusalu, Liina
9	Replicates	Repl	#	Pajusalu, Liina
10	DATE/TIME	Date/Time		Pajusalu, Liina		Geocode
11	Temperature, water	Temp	°C	Pajusalu, Liina
12	Irradiance	E	µmol/m²/s	Pajusalu, Liina
13	Salinity	Sal		Pajusalu, Liina
14	Salinity, standard deviation	Sal std dev	±	Pajusalu, Liina
15	Temperature, water	Temp	°C	Pajusalu, Liina
16	Temperature, water, standard deviation	Temp std dev	±	Pajusalu, Liina
17	pH	pH		Pajusalu, Liina		NBS scale
18	pH, standard deviation	pH std dev	±	Pajusalu, Liina		NBS scale
19	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Pajusalu, Liina
20	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Pajusalu, Liina
21	Nitrogen, total	TN	µmol/l	Pajusalu, Liina
22	Nitrogen, total, standard deviation	TN std dev	±	Pajusalu, Liina
23	Phosphorus, total	TP	µmol/l	Pajusalu, Liina
24	Phosphorus, standard deviation	P std dev	±	Pajusalu, Liina
25	Phosphate	[PO4]3-	µmol/l	Pajusalu, Liina
26	Phosphate, standard deviation	[PO4]3- std dev	±	Pajusalu, Liina
27	Nitrate and Nitrite	[NO3]- + [NO2]-	µmol/l	Pajusalu, Liina
28	Nitrate and Nitrite, standard deviation	[NO3]- + [NO2]- std dev	±	Pajusalu, Liina
29	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
30	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
31	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
32	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)
33	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)
34	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
35	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	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:

2990 data points

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