Citation:

s00227-017-3102-4

Name: Seawater carbonate chemistry and algal abundance, growth and flourometry data of a late summer suface sea ice community
Published: 2017-05-26
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Antarctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Entire community; Field experiment; Growth/Morphology; Pelagos; Polar; Primary production/Photosynthesis

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Abstract:

Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the same time, pH levels can rise above 9 and nutrients can become limiting. In January 2014, the sea ice microbial community from the top 30 cm of the ice was exposed to a gradient of pH and CO2 (5 treatments) that ranged from 8.87 to 7.12 and 5-215 µmol CO2 kg?1, respectively, and incubated in situ. While growth rates were reduced at the highest and lowest pH, the differences were not significant. Likewise, there were no significant differences in maximum quantum yield of PSII (Fv/Fm) or relative maximum electron transfer rates (rETRmax) among treatments. In a parallel experiment, a CO2 gradient of 26-230 µmol CO2 kg?1 (5 treatments) was tested, keeping pH constant. In this experiment, growth rates increased by approximately 40% with increasing CO2, although differences among treatments were not significant.. As in the previous experiment, there was no significant response in Fv/Fm or rETRmax. A synchronous grazing dilution experiment found grazing rates to be inconclusive These results suggest that the summer sea ice brine communities were not limited by in situ CO2 concentrations and were not adversely affected by pH values down to 7.1.

Keyword(s):

Antarctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Entire community; Field experiment; Growth/Morphology; Pelagos; Polar; Primary production/Photosynthesis

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: -77.850000 * Longitude: 166.750000

Date/Time Start: 2014-11-14T00:00:00 * Date/Time End: 2014-11-22T00:00:00

Event(s):

McMurdo_Sound_experiment * Latitude: -77.850000 * Longitude: 166.750000 * Date/Time Start: 2014-11-14T00:00:00 * Date/Time End: 2014-11-22T00:00:00 * 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 2017-05-26.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		McMinn, Andrew		study
2	Experiment duration	Exp duration	days	McMinn, Andrew
3	Experiment	Exp		McMinn, Andrew
4	pH	pH		McMinn, Andrew		total scale
5	Carbon dioxide	CO2	µmol/kg	McMinn, Andrew
6	Biovolume	Biovol	mm³/l	McMinn, Andrew
7	Cell biovolume, standard deviation	Cell biovol std dev	±	McMinn, Andrew
8	Number of cells	No cells	#	McMinn, Andrew
9	Cell counts, standard deviation	Cell count std dev	±	McMinn, Andrew
10	Chlorophyll a	Chl a	pmol/l	McMinn, Andrew
11	Chlorophyll a, standard deviation	Chl a std dev	±	McMinn, Andrew
12	Growth rate	µ	1/day	McMinn, Andrew
13	Growth rate, standard deviation	µ std dev	±	McMinn, Andrew
14	Maximum photochemical quantum yield of photosystem II	Fv/Fm		McMinn, Andrew
15	Maximum photochemical quantum yield of photosystem II, standard deviation	Fv/Fm std dev	±	McMinn, Andrew
16	Maximum photochemical quantum yield of photosystem II	Fv/Fm		McMinn, Andrew
17	Maximum photochemical quantum yield of photosystem II, standard deviation	Fv/Fm std dev	±	McMinn, Andrew
18	Maximal electron transport rate, relative	rETR max		McMinn, Andrew
19	Maximal electron transport rate, relative, standard deviation	rETR max std dev	±	McMinn, Andrew
20	Maximal electron transport rate, relative	rETR max		McMinn, Andrew
21	Maximal electron transport rate, relative, standard deviation	rETR max std dev	±	McMinn, Andrew
22	Maximal electron transport rate, relative	rETR max		McMinn, Andrew
23	Maximal electron transport rate, relative, standard deviation	rETR max std dev	±	McMinn, Andrew
24	Index	Index		McMinn, Andrew		acclimation
25	Index	Index		McMinn, Andrew		acclimation
26	Salinity	Sal		McMinn, Andrew
27	Temperature, water	Temp	°C	McMinn, Andrew
28	Silicate	Si(OH)4	µmol/l	McMinn, Andrew
29	Phosphate	[PO4]3-	µmol/l	McMinn, Andrew
30	Carbon, inorganic, dissolved	DIC	µmol/kg	McMinn, Andrew
31	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	McMinn, Andrew
32	Alkalinity, total	AT	µmol/kg	McMinn, Andrew
33	Alkalinity, total, standard deviation	AT std dev	±	McMinn, Andrew
34	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	McMinn, Andrew
35	Carbonate ion	[CO3]2-	µmol/kg	McMinn, Andrew
36	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
38	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	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)
40	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)
41	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
42	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
43	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
44	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:

430 data points

Data

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

1 Type (study)	2 Exp duration [days]	3 Exp	4 pH (total scale)	5 CO2 [µmol/kg]	6 Biovol [mm³/l]	7 Cell biovol std dev [±]	8 No cells [#]	9 Cell count std dev [±]	10 Chl a [pmol/l]	11 Chl a std dev [±]	12 µ [1/day]	13 µ std dev [±]	14 Fv/Fm	15 Fv/Fm std dev [±]	16 Fv/Fm	17 Fv/Fm std dev [±]	18 rETR max	19 rETR max std dev [±]	20 rETR max	21 rETR max std dev [±]	22 rETR max	23 rETR max std dev [±]	24 Index (acclimation)	25 Index (acclimation)	26 Sal	27 Temp [°C]	28 Si(OH)4 [µmol/l]	29 [PO4]3- [µmol/l]	30 DIC [µmol/kg]	31 DIC std dev [±]	32 AT [µmol/kg]	33 AT std dev [±]	34 pCO2water_SST_wet [µatm]	35 [CO3]2- [µmol/kg]	36 CSC flag	37 pH (total scale)	38 CO2 [µmol/kg]	39 fCO2water_SST_wet [µatm]	40 pCO2water_SST_wet [µatm]	41 [HCO3]- [µmol/kg]	42 [CO3]2- [µmol/kg]	43 Omega Arg	44 Omega Cal
field	6	Variable pH (experiment 1)	8.87	5	0.0000876	0.0000016	390.00		7260000	1640000	0.219	0.048	0.559	0.015	0.537	0.048	56.7	7.4	54.4	7.3	49.1	9.2	128	117	38	-0.5	1.63	1.03	2133	55	2872	70	45	671	15	8.88	2.78	44.08	44.28	1611.47	518.75	7.72	12.24
field	6	Variable pH (experiment 1)	8.40	11	0.0001100	0.0000050	724.00		7810000	2920000	0.243	0.090	0.535	0.013	0.525	0.036	51.8	5.5	54.5	5.7	43.5	3.7	120	104	38	-0.5	1.63	1.03	2157	118	2662	39	170	222	15	8.65	5.23	83.10	83.47	1806.12	345.65	5.14	8.16
field	6	Variable pH (experiment 1)	7.75	29	0.0001560	0.0000180	771.00		9170000	1460000	0.238	0.035	0.536	0.013	0.528	0.014	53.1	2.7	52.3	7.3	42.3	8.1	122	103	38	-0.5	1.63	1.03	2060	52	2095	41	807	73	15	7.76	44.49	706.53	709.67	1967.28	48.24	0.72	1.14
field	6	Variable pH (experiment 1)	7.29	94	0.0001570	0.0000200	706.00		10590000	3210000	0.227	0.068	0.547	0.007	0.538	0.013	51.4	8.0	53.8	3.9	46.0	6.9	116	111	38	-0.5	1.63	1.03	2067	55	1963	16	2134	46	15	7.28	130.98	2080.13	2089.39	1920.41	15.61	0.23	0.37
field	6	Variable pH (experiment 1)	7.12	215	0.0001640	0.0000240	788.00		9720000	940000	0.223	0.020	0.524	0.011	0.501	0.049	49.5	5.6	51.8	6.8	47.4	7.2	137	127	38	-0.5	1.63	1.03	2022	101	1822	34	3493	9	15	7.03	215.15	3416.82	3432.05	1798.52	8.34	0.12	0.20
field	6	Variable pH (experiment 1)	7.97	26	0.0002630	0.0000220	8.92	2.96	205000	62000	1518.000		0.553	0.017	0.446	0.042	48.9	4.9	41.6	3.6	42.9	3.9	113	117	38	-0.5	1.63	1.03	2019	24	2102	64	423	77	15	7.92	29.73	472.10	474.20	1920.48	68.79	1.02	1.62
field	6	Variable pH (experiment 1)	7.74	89	0.0002320	0.0000170	8.60	2.17	217000	54000	1168.000		0.577	0.016	0.469	0.020	59.4	7.7	49.2	5.1	44.3	7.1	126	132	38	-0.5	1.63	1.03	3968	111	3999	75	1450	91	15	7.74	88.86	1411.13	1417.41	3789.53	89.61	1.33	2.12
field	6	Variable pH (experiment 1)	8.15	115	0.0002010	0.0000390	9.02	1.60	232000	39000	1012.000		0.546	0.025	0.496	0.046	54.5	8.7	46.3	5.6	50.5	8.3	129	122	38	-0.5	1.63	1.03	7859	35	8055	334	1853	268	15	7.92	115.71	1837.67	1845.85	7475.51	267.78	3.98	6.32
field	6	Variable pH (experiment 1)	7.96	188	0.0001180	0.0000250	9.20	1.22	253000	32000	444.000		0.560	0.018	0.473	0.020	55.3	9.8	55.3	7.4	50.3	4.5	135	116	38	-0.5	1.63	1.03	14303	61	14709	1296	3053	545	15	7.97	187.42	2976.51	2989.78	13570.74	544.83	8.11	12.86
field	6	Variable pH (experiment 1)	7.97	230	0.0004150	0.0000980	8.85	0.84	248000	22000	1585.000		0.563	0.016	0.508	0.041	54.9	7.5	62.7	4.4	54.9	7.2	120	146	38	-0.5	1.63	1.03	17879	304	18432	2087	3743	693	15	8.00	220.27	3498.24	3513.84	16936.67	722.06	10.74	17.04