Citation:

meps334037

Name: Seawater carbonate chemistry and calcification at Anse des Cuivres, NW Mediterranean, 2004
Published: 2007
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; Mediterranean Sea; Rocky-shore community; South Pacific; Temperate

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

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

The community metabolism of a shallow infralittoral ecosystem dominated by the calcareous macroalgae Corallina elongata was investigated in Marseilles (NW Mediterranean), by monitoring hourly changes of seawater pH and total alkalinity over 6 d in February 2000. Fair weather conditions prevailed over the study period as indicated by oceanographic (temperature, salinity, and current velocity and direction) and meteorological variables, which validated the standing water hypothesis. This temperate ecosystem exhibited high community gross primary production (GPP = 519 ± 106 mmol C m-2 d-1, n = 6) and also supported high rates of community respiration (R). As a result, the system was slightly autotrophic (net community production, NCP = 20 mmol C m-2 d-1), with a GPP/R ratio of 1.06. NCP exhibited circadian variations with 2- to 3-fold changes in community respiration, both in the light and in the dark. Rates of net community calcification also exhibited circadian variations, with positive rates (up to 24 mmol CaCO3 m-2 h-1) for irradiance values >300 W m-2 (about 1380 µmol photon m-2 s-1). Below this irradiance threshold, net community dissolution prevailed. Daily net calcification (G) was on average 8 mmol CaCO3 m-2 d-1. CO2 fluxes generated by primary production, respiration, and calcification suggest that the study site was a potential atmospheric CO2 sink of 15 mmol CO2 m-2 d-1 at the time of measurement.

Keyword(s):

Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; Mediterranean Sea; Rocky-shore community; South Pacific; Temperate

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

Coverage:

Latitude: 43.280000 * Longitude: 5.350000

Date/Time Start: 2004-02-24T00:00:00 * Date/Time End: 2004-02-29T22:00:00

Minimum DEPTH, water: 3 m * Maximum DEPTH, water: 3 m

Event(s):

BG_07 * Latitude: 43.280000 * Longitude: 5.350000 * Location: NW Mediterranean * Method/Device: Biology (BIO)

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	DATE/TIME	Date/Time				Geocode
2	DEPTH, water	Depth water	m			Geocode
3	Salinity	Sal		Bensoussan, Nathaniel	Multi meter, WTW, LF 197
4	Temperature, water	Temp	°C	Bensoussan, Nathaniel	Multi meter, WTW, LF 197
5	Radiation, photosynthetically active	PAR	µmol/m²/s	Bensoussan, Nathaniel	PAR sensor LI-190SA, LI-COR Inc.
6	Carbonate system computation flag	CSC flag		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
7	pH	pH		Bensoussan, Nathaniel	Automatic module for alkalinity measurement (AMAM)	NBS scale
8	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale
9	Alkalinity, total	AT	mmol(eq)/l	Bensoussan, Nathaniel	Automatic module for alkalinity measurement (AMAM)
10	Alkalinity, total	AT	µmol/kg	Bensoussan, Nathaniel	Calculated	Original data in µEq/l, density, gotten from salinity and temperature, was used for conversion
11	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
12	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)
13	Fugacity of carbon dioxide in seawater	fCO2w	µatm	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
14	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
15	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
16	Carbon, inorganic, dissolved	DIC	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
17	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
18	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
19	Calcification rate of calcium carbonate	Calc rate CaCO3	mmol/m²/h	Bensoussan, Nathaniel	Alkalinity anomaly technique (Smith and Key, 1975)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2340 data points

Download Data

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

View dataset as HTML (shows only first 2000 rows)