Citation:

srep41443

Name: Seawater carbonate chemistry and leaf coloration, photophysiology and photosynthetic pigments of seagrass Zostera noltii
Published: 2017-06-01
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Laboratory experiment; North Atlantic; Plantae; Primary production/Photosynthesis; Seagrass; Single species; Temperate; Tracheophyta; Zostera noltii

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Abstract:

Seagrasses play an essential ecological role within coastal habitats and their worldwide population decline has been linked to different types of anthropogenic forces. We investigated, for the first time, the combined effects of future ocean warming and acidification on fundamental biological processes of Zostera noltii, including shoot density, leaf coloration, photophysiology (electron transport rate, ETR; maximum PSII quantum yield, Fv/Fm) and photosynthetic pigments. Shoot density was severely affected under warming conditions, with a concomitant increase in the frequency of brownish colored leaves (seagrass die-off). Warming was responsible for a significant decrease in ETR and Fv/Fm (particularly under control pH conditions), while promoting the highest ETR variability (among experimental treatments). Warming also elicited a significant increase in pheophytin and carotenoid levels, alongside an increase in carotenoid/chlorophyll ratio and De-Epoxidation State (DES). Acidification significantly affected photosynthetic pigments content (antheraxanthin, beta-carotene, violaxanthin and zeaxanthin), with a significant decrease being recorded under the warming scenario. No significant interaction between ocean acidification and warming was observed. Our findings suggest that future ocean warming will be a foremost determinant stressor influencing Z. noltii survival and physiological performance. Additionally, acidification conditions to occur in the future will be unable to counteract deleterious effects posed by ocean warming.

Keyword(s):

Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Laboratory experiment; North Atlantic; Plantae; Primary production/Photosynthesis; Seagrass; Single species; Temperate; Tracheophyta; Zostera noltii

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: 38.488450 * Longitude: -8.887530

Event(s):

Caldeira_de_Troia * Latitude: 38.488450 * Longitude: -8.887530 * 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 2017-05-26.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Repolho, Tiago		study
2	Species	Species		Repolho, Tiago
3	Registration number of species	Reg spec no		Repolho, Tiago
4	Uniform resource locator/link to reference	URL ref		Repolho, Tiago		WoRMS Aphia ID
5	Experiment duration	Exp duration	days	Repolho, Tiago
6	Temperature, water	Temp	°C	Repolho, Tiago
7	pH	pH		Repolho, Tiago		total scale
8	Shoots	Shoots	#	Repolho, Tiago
9	Shoots	Shoots	#	Repolho, Tiago		100% green
10	Shoots	Shoots	#	Repolho, Tiago		100% Brown
11	Shoots	Shoots	#	Repolho, Tiago		75% Green
12	Shoots	Shoots	#	Repolho, Tiago		50% Green/Brown
13	Maximum photochemical quantum yield of photosystem II	Fv/Fm		Repolho, Tiago
14	Electron transport rate	ETR	µmol e/m²/s	Repolho, Tiago
15	Chlorophyll a	Chl a	µg/g	Repolho, Tiago
16	Chlorophyll b	Chl b	µg/g	Repolho, Tiago
17	Pheophytin a	Phytin a	µg/g	Repolho, Tiago
18	Pheophytin b	Phytin b	µg/g	Repolho, Tiago
19	Auroxanthin	Auro	µg/g	Repolho, Tiago
20	Antheraxanthin	Anthera	µg/g	Repolho, Tiago
21	beta-Carotene	b-Car	µg/g	Repolho, Tiago
22	Lutein	Lut	µg/g	Repolho, Tiago
23	Violaxanthin	Viola	µg/g	Repolho, Tiago
24	Zeaxanthin	Zea	µg/g	Repolho, Tiago
25	Chlorophyll total, per mass	Chl tot	mg/g	Repolho, Tiago
26	Carotenoids	Carotenoids	µg/g	Repolho, Tiago
27	Ratio	Ratio		Repolho, Tiago		carotene/chlorophyll ratio
28	De-epoxidation state	DES		Repolho, Tiago
29	Temperature, water	Temp	°C	Repolho, Tiago
30	Temperature, water, standard deviation	Temp std dev	±	Repolho, Tiago
31	Salinity	Sal		Repolho, Tiago
32	Salinity, standard deviation	Sal std dev	±	Repolho, Tiago
33	pH	pH		Repolho, Tiago	Potentiometric	total scale
34	pH, standard deviation	pH std dev	±	Repolho, Tiago	Potentiometric	total scale
35	Alkalinity, total	AT	µmol/kg	Repolho, Tiago	Potentiometric titration
36	Alkalinity, total, standard deviation	AT std dev	±	Repolho, Tiago	Potentiometric titration
37	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Repolho, Tiago	Calculated using CO2SYS
38	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Repolho, Tiago	Calculated using CO2SYS
39	Carbon, inorganic, dissolved	DIC	µmol/kg	Repolho, Tiago	Calculated using CO2SYS
40	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Repolho, Tiago	Calculated using CO2SYS
41	Aragonite saturation state	Omega Arg		Repolho, Tiago	Calculated using CO2SYS
42	Aragonite saturation state, standard deviation	Omega Arg std dev	±	Repolho, Tiago	Calculated using CO2SYS
43	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
44	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
45	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)
46	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)
47	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
48	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
49	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
50	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
51	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:

11760 data points

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