Citation:

PANGAEA.924886

Name: Seawater carbonate chemistry and net calcification, relative electron transport rates and photosynthetic pigments of Porolithon onkodes
Published: 2018
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Animalia; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Macro-nutrients; Porolithon onkodes; Primary production/Photosynthesis; Single species; South Pacific; Tropical

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Abstract:

Ocean acidification (OA) and nutrient enrichment threaten the persistence of near shore ecosystems, yet little is known about their combined effects on marine organisms. Here, we show that a threefold increase in nitrogen concentrations, simulating enrichment due to coastal eutrophication or consumer excretions, offset the direct negative effects of near-future OA on calcification and photophysiology of the reef-building crustose coralline alga, Porolithon onkodes. Projected near-future pCO2 levels (approx. 850 µatm) decreased calcification by 30% relative to ambient conditions. Conversely, nitrogen enrichment (nitrate + nitrite and ammonium) increased calcification by 90–130% in ambient and high pCO2 treatments, respectively. pCO2 and nitrogen enrichment interactively affected instantaneous photophysiology, with highest relative electron transport rates under high pCO2 and high nitrogen. Nitrogen enrichment alone increased concentrations of the photosynthetic pigments chlorophyll a, phycocyanin and phycoerythrin by approximately 80–450%, regardless of pCO2. These results demonstrate that nutrient enrichment can mediate direct organismal responses to OA. In natural systems, however, such direct benefits may be counteracted by simultaneous increases in negative indirect effects, such as heightened competition. Experiments exploring the effects of multiple stressors are increasingly becoming important for improving our ability to understand the ramifications of local and global change stressors in near shore ecosystems.

Keyword(s):

Animalia; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Macro-nutrients; Porolithon onkodes; Primary production/Photosynthesis; Single species; South Pacific; Tropical

Supplement to:

Johnson, Maggie Dorothy; Carpenter, Robert C (2018): Nitrogen enrichment offsets direct negative effects of ocean acidification on a reef-building crustose coralline alga. Biology Letters, 14(7), 20180371, https://doi.org/10.1098/rsbl.2018.0371

Original version:

Johnson, Maggie Dorothy; Carpenter, Robert C (2018): Calcification, photophysiology and treatment parameters for laboratory experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.887917

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2020): seacarb: seawater carbonate chemistry with R. R package version 3.2.14. https://CRAN.R-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: -17.533000 * Longitude: 149.833000

Event(s):

Moorea_north_shore * Latitude: -17.533000 * Longitude: 149.833000 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2020) 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 2020-11-11.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Johnson, Maggie Dorothy		study
2	Species	Species		Johnson, Maggie Dorothy
3	Registration number of species	Reg spec no		Johnson, Maggie Dorothy
4	Uniform resource locator/link to reference	URL ref		Johnson, Maggie Dorothy		WoRMS Aphia ID
5	Identification	ID		Johnson, Maggie Dorothy
6	Treatment	Treat		Johnson, Maggie Dorothy		ACHN (Ambient CO2&High Nitrogen), ACAN (Ambient CO2&Ambient Nitrogen), HCHN (High CO2&High Nitrogen), HCAN (High CO2&Ambient nitrogen)
7	Calcification rate	Calc rate	mg/cm²	Johnson, Maggie Dorothy		net
8	Electron transport rate, relative	rETR		Johnson, Maggie Dorothy
9	Chlorophyll a	Chl a	µg/mg	Johnson, Maggie Dorothy		per fresh weight
10	Phycocyanin	Phycoc	µg/g	Johnson, Maggie Dorothy		per fresh weight
11	Phycoerythrin	Phycoe	µg/g	Johnson, Maggie Dorothy		per fresh weight
12	Temperature, water	Temp	°C	Johnson, Maggie Dorothy
13	Temperature, water, standard error	T std e	±	Johnson, Maggie Dorothy
14	Salinity	Sal		Johnson, Maggie Dorothy
15	Salinity, standard error	Sal std e	±	Johnson, Maggie Dorothy
16	Irradiance	E	µmol/m²/s	Johnson, Maggie Dorothy
17	Irradiance, standard error	E std e	±	Johnson, Maggie Dorothy
18	Flow rate	Flow rate	l/min	Johnson, Maggie Dorothy
19	Flow rate, standard error	Flow rate std e	±	Johnson, Maggie Dorothy
20	pH	pH		Johnson, Maggie Dorothy		total scale
21	pH, standard error	pH std e	±	Johnson, Maggie Dorothy		total scale
22	Alkalinity, total	AT	µmol/kg	Johnson, Maggie Dorothy
23	Alkalinity, total, standard error	AT std e	±	Johnson, Maggie Dorothy
24	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Johnson, Maggie Dorothy	Calculated using CO2SYS
25	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error	pCO2water_SST_wet std e	±	Johnson, Maggie Dorothy	Calculated using CO2SYS
26	Calcite saturation state	Omega Cal		Johnson, Maggie Dorothy	Calculated using CO2SYS
27	Calcite saturation state, standard error	Omega Cal std e	±	Johnson, Maggie Dorothy	Calculated using CO2SYS
28	Nitrate and Nitrite	[NO3]- + [NO2]-	µmol/l	Johnson, Maggie Dorothy
29	Nitrate and Nitrite, standard error	[NO3]- + [NO2]- std e	±	Johnson, Maggie Dorothy
30	Ammonium	[NH4]+	µmol/l	Johnson, Maggie Dorothy
31	Ammonium, standard error	[NH4]+ std e	±	Johnson, Maggie Dorothy
32	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
33	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
34	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)
35	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)
36	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

11905 data points

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