Foraminiferal communities from three stations on the French Mediterranean coast to test density separation methods
|Temporal extent||2015-04-02 -2015-04-08|
|Author(s)||Parent Briz1, Barras Christine1, Frans Jorissen1|
|Affiliation(s)||1 : UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d’Angers, Faculté des Sciences, 2 boulevard Lavoisier, 49045 Angers cedex, France|
The data present foraminiferal counts from three stations sampled between the 2nd and the 8th April 2015. These data were collected as part of the Water Framework Directive (WFD) survey on the French Mediterranean coast (DCE4-1 campaign). The primary use of these foraminiferal data is to evaluate the environmental quality of coastal environment of the French Mediterranean coast. More particularly these data were used to test the efficiency of density separation methods to extract foraminifera from sandy samples in biomonitoring studies.
A Reineck box-corer was used to sampled surface sediment and at each station three replicates were taken (i.e., different box-corer launch). Each replicate was sub-cored (7.45 cm diameter) and the top 0-1 centimetre was stained with Rose Bengal at 2 g.L-1 and preserved in 96% ethanol. In the laboratory samples were washed through 63, 125, 150, and 500 µm sieves. The 125–150 µm and the 150–500 µm fractions were both split in two with a Folsom wet splitter. Different density separation methods were applied on each split. These density separations were carrying out using different high-density liquids (i.e., TCE: Trichloroethylene; ZC: Zinc Chloride; SPT: Sodium Polytungstate), at different density (i.e., 1.46, 1.7, 2.1, 2.3, and 2.5). In the database, the sample volume corresponds to the total volume of sediment in millilitre before sieving, and the split volume corresponds to the volume of each split in millilitre. See Parent et al. 2018 for a full description of the method.
|Utilisation||Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality and include estimates of data quality and accuracy, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. These data correspond to raw count of foraminifera. Therefore, split and total volume of sediment must be considered to standardise the data and allow comparison between samples. Authors welcome users to ask questions and report problems.|
|Acknowledgements||The authors wish to acknowledge the French Water Agency Rhône Méditerrannée Corse for funding this study and also the Ifremer and the R/V Europe crew for providing cruise facilities during the Water Framework Directive 2015 campaign. Élodie Poux is thanked for producing part of the data. Sophie Sanchez is thanked for technical assistance with the various heavy liquid separation procedures.|