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de Nooijer, Lennart Jan; Hathorne, Ed; Reichart, Gert-Jan; Langer, Gerald; Bijma, Jelle (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, LJ et al. (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

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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%
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
1GroupGroupde Nooijer, Lennart Jan
2Sample IDSample IDde Nooijer, Lennart Jan
3Sample code/labelLabelde Nooijer, Lennart Jan
4NameNamede Nooijer, Lennart JanStandard
5NumberNode Nooijer, Lennart Jan
6CalciumCa%de Nooijer, Lennart Jan
7GainGainde Nooijer, Lennart Jan
8Boron 1111Bmg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
9Magensium 2525Mgmg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
10Aluminium 2727Almg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
11Calcium 4343Camg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
12Manganese 5555Mnmg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
13Zinc 6666Znmg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
14Strontium 8888Srmg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
15Barium 137137Bamg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
16Uranium 238238Umg/kgde Nooijer, Lennart JanLA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer
Size:
5390 data points

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