Citation:

bg-7-81-2010

Name: Seawater carbonate chemistry and processes during experiments with benthic foraminifera Ammonia tepida
Published: 2010-02-18
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Ammonia tepida; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chromista; Coast and continental shelf; Foraminifera; Heterotrophic prokaryotes; Laboratory experiment; North Atlantic; Single species; Temperate; Temperature

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook Twitter

Abstract:

Evidence of increasing concentrations of dissolved carbon dioxide, especially in the surface ocean and its associated impacts on calcifying organisms, is accumulating. Among these organisms, benthic and planktonic foraminifera are responsible for a large amount of the globally precipitated calcium carbonate. Hence, their response to an acidifying ocean may have important consequences for future inorganic carbon cycling. To assess the sensitivity of benthic foraminifera to changing carbon dioxide levels and subsequent alteration in seawater carbonate chemistry, we cultured specimens of the shallow water species Ammonia tepida at two concentrations of atmospheric CO2 (230 and 1900 ppmv) and two temperatures (10 °C and 15 °C). Shell weights and elemental compositions were determined. Impact of high and low pCO2 on elemental composition are compared with results of a previous experiment were specimens were grown under ambient conditions (380 ppvm, no shell weight measurements of specimen grown under ambient conditions are, however, available). Results indicate that shell weights decrease with decreasing [CO3], although calcification was observed even in the presence of calcium carbonate under-saturation, and also decrease with increasing temperature. Thus both warming and ocean acidification may act to decrease shell weights in the future. Changes in [CO3] or total dissolved inorganic carbon do not affect the Mg distribution coefficient. On the contrary, Sr incorporation is enhanced under increasing [CO3]. Implications of these results for the paleoceanographic application of foraminifera are discussed.

Keyword(s):

Ammonia tepida; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chromista; Coast and continental shelf; Foraminifera; Heterotrophic prokaryotes; Laboratory experiment; North Atlantic; Single species; Temperate; Temperature

Project(s):

European network of excellence for Ocean Ecosystems Analysis (EUR-OCEANS)

European Project on Ocean Acidification (EPOCA)

Ocean Acidification International Coordination Centre (OA-ICC)

Funding:

Seventh Framework Programme (FP7), grant/award no. 211384 : European Project on Ocean Acidification

Sixth Framework Programme (FP6), grant/award no. 511106 : European network of excellence for Ocean Ecosystems Analysis

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Experimental treatment	Exp treat		Dissard, Delphine		LS- low salinity, LT- low temperature, HS- high salinity, HT- high temperature
2	Salinity	Sal		Dissard, Delphine
3	Temperature, water	Temp	°C	Dissard, Delphine
4	Carbonate system computation flag	CSC flag		Dissard, Delphine
5	Alkalinity, total	AT	µmol/kg	Dissard, Delphine	Alkalinity, Gran titration (Gran, 1950)
6	Carbon, inorganic, dissolved	DIC	µmol/kg	Dissard, Delphine	Titration potentiometric
7	pH	pH		Dissard, Delphine	pH meter (WYTW 3000)	NBS scale
8	pH	pH		Dissard, Delphine	Calculated using CO2SYS	NBS scale
9	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale
10	Bicarbonate ion	[HCO3]-	µmol/kg	Dissard, Delphine	Calculated using CO2SYS
11	Carbonate ion	[CO3]2-	µmol/kg	Dissard, Delphine	Calculated using CO2SYS
12	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Dissard, Delphine	Calculated using CO2SYS
13	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
14	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
15	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
16	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
17	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
18	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
19	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
20	Ammonia tepida	A. tepida		Dissard, Delphine	Microscopy	Start
21	Ammonia tepida	A. tepida		Dissard, Delphine	Microscopy	Presenting new chambers
22	Magnesium	Mg2+	mg/kg	Dissard, Delphine
23	Strontium	Sr	mg/kg	Dissard, Delphine
24	Calcium	Ca2+	mg/kg	Dissard, Delphine

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

192 data points

Data

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

1 Exp treat (LS- low salinity, LT- low tem...)	2 Sal	3 Temp [°C]	4 CSC flag	5 AT [µmol/kg] (Alkalinity, Gran titration (G...)	6 DIC [µmol/kg] (Titration potentiometric)	7 pH (NBS scale, pH meter (WYTW 3000))	8 pH (NBS scale, Calculated using C...)	9 pH (Total scale, Calculated using...)	10 [HCO3]- [µmol/kg] (Calculated using CO2SYS)	11 [CO3]2- [µmol/kg] (Calculated using CO2SYS)	12 pCO2water_SST_wet [µatm] (Calculated using CO2SYS)	13 CO2 [µmol/kg] (Calculated using seacarb afte...)	14 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	15 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	16 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	17 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	18 Omega Arg (Calculated using seacarb afte...)	19 Omega Cal (Calculated using seacarb afte...)	20 A. tepida (Start, Microscopy)	21 A. tepida (Presenting new chambers, Micr...)	22 Mg2+ [mg/kg]	23 Sr [mg/kg]	24 Ca2+ [mg/kg]
¥LS, LT, pCO2=120¥	24.7	10	15	1868	1703	8.31	8.33	8.21	1573	119	232	10.77	232.21	231.32	1573.37	118.86	1.84	2.99	50	31	775.25	4.51	241.46
¥LS, LT, pCO2=2000¥	24.8	10	15	1916	1981	7.49	7.46	7.34	1868	19	2017	93.53	2017.32	2009.66	1868.15	19.32	0.30	0.49	50	41	781.78	4.56	244.59
¥LS, HT, pCO2=120¥	24.6	15	15	1891	1696	8.39	8.33	8.20	1546	141	239	9.43	238.39	237.54	1546.09	140.48	2.22	3.57	50	29	776.78	4.53	242.32
¥LS, HT, pCO2=2000¥	24.6	15	15	1931	1971	7.53	7.50	7.38	1869	25	1940	76.70	1938.76	1931.85	1869.04	25.26	0.40	0.64	50	33	782.02	4.54	244.28
¥HS, LT, pCO2=120¥	33.2	10	15	2558	2232	8.36	8.41	8.31	1987	236	223	9.83	222.62	221.78	1986.75	235.42	3.59	5.67	50	30	1083.39	6.01	331.29
¥HS, LT, pCO2=2000¥	32.8	10	15	2507	2526	7.52	7.59	7.48	2404	42	1803	79.79	1802.39	1795.55	2403.98	42.22	0.65	1.02	50	30	1024.09	6.02	328.62
¥HS, HT, pCO2=120¥	32.7	15	15	2537	2175	8.39	8.41	8.29	1904	263	229	8.65	228.65	227.84	1904.10	262.25	4.06	6.34	50	29	1084.66	6.08	331.62
¥HS, HT, pCO2=2000¥	33.1	15	15	2506	2504	7.61	7.59	7.48	2383	51	1868	70.39	1866.25	1859.60	2382.84	50.77	0.78	1.22	50	31	1073.04	6.07	331.17