Position-resolved determination of trace elements in mandibular gnathobases of the Antarctic copepod <Emphasis Type="Italic">Calanoides acutus</Emphasis> using a multimethod approach |
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Authors: | Kai Bechstein Jan Michels Jürgen Vogt Gregor C Schwartze Carla Vogt |
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Institution: | 1.Leibniz University Hannover, Institute of Inorganic Chemistry,Hanover,Germany;2.Alfred Wegener Institute for Polar and Marine Research,Bremerhaven,Germany;3.University of Leipzig, Institute of Experimental Physics II,Leipzig,Germany |
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Abstract: | Previous studies have revealed silica formation in the teeth of mandibular gnathobases of copepods while significant amounts
of zinc and copper are present, which might improve mechanical stability of the teeth and represent an adaptation to compact
food particles. The present study aimed at analysing the distribution and concentration of trace elements in the mandibular
gnathobases of females of the Antarctic copepod species Calanoides acutus. Because of the low overall masses of few micrograms per specimen the application of a combination of position-resolved micro-beam
techniques was necessary and micro-particle-induced X-ray emission spectrometry and laser ablation inductively coupled plasma
mass spectrometry were used to determine Ba, Br, Ca, Cl, Cu, Fe, K, Mg, Na, Ni, P, S, Si and Zn in the samples with μm to
sub-μm resolution. Calibration strategies were optimised to fit for the carbonate matrix. The analyses revealed a distinct
enrichment of Br, Ca, Fe, K, S, Si and Zn in the teeth of the gnathobases. |
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