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Multiproxy approach for Holocene paleoenvironmental reconstructions from microorganisms (testate amoebae and foraminifera) and sediment analyses: The infilling of the Loire Valley in Nantes (France)
Foraminifera and testate amoebae are jointly used with sediment characteristics (sediment size, calcium carbonate, C, H, N and S proportions, and clay mineralogy) to reconstruct the Holocene sedimentExpand
The mineral composition of the tests of ‘testate amoebae’ (Amoebozoa, Arcellinida): The relative importance of grain availability and grain selection
It is concluded that the testate amoebae select grains according to their size from those available within their immediate environment, while their size seems to be a function of the distance from the source. Expand
Cinderella's helping pigeons of the microbial world: The potential of testate amoebae for identifying cryptotephra.
This work analyzed by X-ray Spectrometry the mineral signature of tephra from the 2011 Puyehue-Cordon Caulle Volcanic Complex (Chile) eruption ash fallout and compared it to that of the shells of 51 individual testate amoebae from 13 samples collected at different distances from the active vent. Expand
Three-Dimensional Morphological and Mineralogical Characterization of Testate Amebae
3D X-ray micro-tomography data shows that D. oblonga is able to selectively pick up the small size fraction of the sediment with a preference for low-density silicates close to quartz density, suggesting the existence of a physical limit to grain size used for building the shell. Expand
Origin and diversity of testate amoebae shell composition: Example of Bullinularia indica living in Sphagnum capillifolium.
The shell content of 38 Bullinularia indica individuals, a single xenosomic testate amoeba species living in Sphagnum capillifolium, was analysed by scanning electron microscope (SEM) coupled with X-ray spectroscopy and showed high diversities of mineral, organic, and biomineral grains, which confirms their capability to recycle xenosomes. Expand