Data Description

  Show Map Google Earth
Citation:
de Nooijer, LJ et al. (2015): Laser ablation data of benthic foraminifera from surface sediments collected from the muddy intertidal flats near Dorum, Northwestern Germany in Autumn 2008. doi:10.1594/PANGAEA.841906,
Supplement to: de Nooijer, Lennart Jan; Hathorne, Ed; Reichart, Gert-Jan; Langer, Gerald; Bijma, Jelle (2014): Variability in calcitic Mg/Ca and Sr/Ca ratios in clones of the benthic foraminifer Ammonia tepida. Marine Micropaleontology, 107, 32-43, doi:10.1016/j.marmicro.2014.02.002
Abstract:
Biological activity introduces variability in element incorporation during calcification and thereby decreases the precision and accuracy when using foraminifera as geochemical proxies in paleoceanography. This so-called 'vital effect' consists of organismal and environmental components. Whereas organismal effects include uptake of ions from seawater and subsequent processing upon calcification, environmental effects include migration- and seasonality-induced differences. Triggering asexual reproduction and culturing juveniles of the benthic foraminifer Ammonia tepida under constant, controlled conditions allow environmental and genetic variability to be removed and the effect of cell-physiological controls on element incorporation to be quantified. Three groups of clones were cultured under constant conditions while determining their growth rates, size-normalized weights and single-chamber Mg/Ca and Sr/Ca using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Results show no detectable ontogenetic control on the incorporation of these elements in the species studied here. Despite constant culturing conditions, Mg/Ca varies by a factor of similar to 4 within an individual foraminifer while intra-individual Sr/Ca varies by only a factor of 1.6. Differences between clone groups were similar to the intra-clone group variability in element composition, suggesting that any genetic differences between the clone-groups studied here do not affect trace element partitioning. Instead, variability in Mg/Ca appears to be inherent to the process of bio-calcification itself. The variability in Mg/Ca between chambers shows that measurements of at least 6 different chambers are required to determine the mean Mg/Ca value for a cultured foraminiferal test with a precision of <= 10%
Project(s):
Coverage:
Latitude: 53.739630 * Longitude: 8.513500
Event(s):
Dorum * * Latitude: 53.739630 * Longitude: 8.513500 * Location: Germany * * Device: Sampling by hand (HAND) *
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Group *Groupde Nooijer, Lennart Jan *
2Sample ID *Sample IDde Nooijer, Lennart Jan *
3Sample code/label *Labelde Nooijer, Lennart Jan *
4Name *Namede Nooijer, Lennart Jan *Standard
5Number *Node Nooijer, Lennart Jan *
6Calcium *Ca%de Nooijer, Lennart Jan *
7Gain *Gainde Nooijer, Lennart Jan *
8Boron 11 *11Bmg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
9Magensium 25 *25Mgmg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
10Aluminium 27 *27Almg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
11Calcium 43 *43Camg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
12Manganese 55 *55Mnmg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
13Zinc 66 *66Znmg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
14Strontium 88 *88Srmg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
15Barium 137 *137Bamg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
16Uranium 238 *238Umg/kgde Nooijer, Lennart Jan *LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer *
License:
Size:
5390 data points

Download Data

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

View dataset as HTML (shows only first 2000 rows)