Citation:

j.marenvres.2014.05.008

Name: Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent
Published: 2014-07-08
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Biomass/Abundance/Elemental composition; CO2 vent; Coast and continental shelf; Cymodocea nodosa; Entire community; Field observation; Mediterranean Sea; Primary production/Photosynthesis; Respiration; Soft-bottom community; Temperate

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Abstract:

We examined the long-term effect of naturally acidified water on a Cymodocea nodosa meadow growing at a shallow volcanic CO2 vent in Vulcano Island (Italy). Seagrass and adjacent unvegetated habitats growing at a low pH station (pH = 7.65 ± 0.02) were compared with corresponding habitats at a control station (pH = 8.01 ± 0.01). Density and biomass showed a clear decreasing trend at the low pH station and the below- to above-ground biomass ratio was more than 10 times lower compared to the control. C content and delta 13C of leaves and epiphytes were significantly lower at the low pH station. Photosynthetic activity of C. nodosa was stimulated by low pH as seen by the significant increase in Chla content of leaves, maximum electron transport rate and compensation irradiance. Seagrass community metabolism was intense at the low pH station, with significantly higher net community production, respiration and gross primary production than the control community, whereas metabolism of the unvegetated community did not differ between stations. Productivity was promoted by the low pH, but this was not translated into biomass, probably due to nutrient limitation, grazing or poor environmental conditions. The results indicate that seagrass response in naturally acidified conditions is dependable upon species and geochemical characteristics of the site and highlight the need for a better understanding of complex interactions in these environments.

Keyword(s):

Benthos; Biomass/Abundance/Elemental composition; CO2 vent; Coast and continental shelf; Cymodocea nodosa; Entire community; Field observation; Mediterranean Sea; Primary production/Photosynthesis; Respiration; Soft-bottom community; Temperate

Further details:

Lavigne, Héloïse; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. https://cran.r-project.org/package=seacarb

Project(s):

Mediterranean Sea Acidification in a Changing Climate (MedSeA)

Ocean Acidification International Coordination Centre (OA-ICC)

Funding:

Seventh Framework Programme (FP7), grant/award no. 265103 : Mediterranean Sea Acidification in a Changing Climate

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-07-07.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Apostolaki, Eugenia T
2	Group	Group		Apostolaki, Eugenia T
3	Treatment	Treat		Apostolaki, Eugenia T
4	Shoot density	Shoot den	#/m²	Apostolaki, Eugenia T
5	Shoot density, standard error	Shoot den std e	±	Apostolaki, Eugenia T
6	Biomass	Biom	g/m²	Apostolaki, Eugenia T		above ground
7	Biomass, standard error	Biom std e	±	Apostolaki, Eugenia T		above ground
8	Biomass	Biom	g/m²	Apostolaki, Eugenia T		below ground
9	Biomass, standard error	Biom std e	±	Apostolaki, Eugenia T		below ground
10	Carbon	C	%	Apostolaki, Eugenia T		per dry weight
11	Carbon, standard error	C std e	±	Apostolaki, Eugenia T		per dry weight
12	δ13C	δ13C	‰ PDB	Apostolaki, Eugenia T
13	δ13C, standard error	δ13C std e	±	Apostolaki, Eugenia T
14	Chlorophyll a	Chl a	µg/g	Apostolaki, Eugenia T
15	Chlorophyll a, standard error	Chl a std e	±	Apostolaki, Eugenia T
16	Epiphytes, load	Epiphytes load	g/g	Apostolaki, Eugenia T		per dry weight leaf
17	Epiphytes load, standard error	Epiphytes load std e	±	Apostolaki, Eugenia T		per dry weight leaf
18	Calcium carbonate	CaCO3	%	Apostolaki, Eugenia T		per dry weight
19	Calcium carbonate, standard error	CaCO3 std e	±	Apostolaki, Eugenia T		per dry weight
20	Maximum photochemical quantum yield of photosystem II	Fv/Fm		Apostolaki, Eugenia T
21	Maximum photochemical quantum yield of photosystem II, standard error	Fv/Fm std e	±	Apostolaki, Eugenia T
22	Electron transport rate	ETR	µmol e/m²/s	Apostolaki, Eugenia T		max
23	Electron transport rate, standard error	ETR std e	±	Apostolaki, Eugenia T		max
24	Light saturation point	Ik		Apostolaki, Eugenia T
25	Light saturation point, standard error	Ik std e	±	Apostolaki, Eugenia T
26	Photosynthetic quantum efficiency	alpha		Apostolaki, Eugenia T
27	Photosynthetic quantum efficiency, standard error	alpha std e	±	Apostolaki, Eugenia T
28	Irradiance	E	µmol/m²/s	Apostolaki, Eugenia T		optimum
29	Irradiance, standard error	E std e	±	Apostolaki, Eugenia T		optimum
30	Net community production of carbon	NCP C	mmol/m²/day	Apostolaki, Eugenia T
31	Net community production of carbon, standard error	NCP C std e	±	Apostolaki, Eugenia T
32	Respiration rate, carbon	Resp C	mmol/m²/day	Apostolaki, Eugenia T
33	Respiration rate, carbon, standard error	Resp C std e	±	Apostolaki, Eugenia T
34	Gross primary production of carbon	GPP C	mmol/m²/day	Apostolaki, Eugenia T
35	Gross primary production of carbon, standard error	GPP C std e	±	Apostolaki, Eugenia T
36	Illuminance	E v	lx	Apostolaki, Eugenia T
37	Illuminance, standard error	E v std e	±	Apostolaki, Eugenia T
38	Salinity	Sal		Apostolaki, Eugenia T
39	Temperature, water	Temp	°C	Apostolaki, Eugenia T
40	Temperature, water, standard error	T std e	±	Apostolaki, Eugenia T
41	pH	pH		Apostolaki, Eugenia T	Potentiometric
42	pH, standard error	pH std e	±	Apostolaki, Eugenia T	Potentiometric
43	Oxygen	O2	µmol/l	Apostolaki, Eugenia T
44	Oxygen, standard error	O2 std e	±	Apostolaki, Eugenia T
45	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Apostolaki, Eugenia T
46	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error	pCO2water_SST_wet std e	±	Apostolaki, Eugenia T
47	Carbon, inorganic, dissolved	DIC	µmol/kg	Apostolaki, Eugenia T
48	Carbon, inorganic, dissolved, standard error	DIC std e	±	Apostolaki, Eugenia T
49	Alkalinity, total	AT	µmol/kg	Apostolaki, Eugenia T	Potentiometric titration
50	Alkalinity, total, standard error	AT std e	±	Apostolaki, Eugenia T	Potentiometric titration
51	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
52	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
53	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
54	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)
55	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)
56	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
57	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
58	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
59	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
60	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:

300 data points

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