Université de Neuchâtel

Ecosystem engineers’ contribution to soil structure formation in floodplains

Schomburg, Andreas ; Le Bayon, Claire (Dir.) ; Guenat, Claire (Codir.) ; Brunner, Philip (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2019.

Soil structure formation constitutes an extremely important process in near-natural and restored floodplains. A stable soil structure protects riverbanks from erosion and contributes to the preservation of ecosystem services. However, developing a soil structure in alluvial soils is difficult for several reasons. Extensive alluvial dynamics cause periodic waterlogging and continuously rejuvenate...

Université de Neuchâtel

Coupling X-ray computed tomography and freeze-coring for the analysis of fine-grained low-cohesive soils

Liernur, Adrien ; Schomburg, Andreas ; Turberg, Pascal ; Guenat, Claire ; Le Bayon, Renée-Claire ; Brunner, Philip

In: Geoderma, 2017, vol. 308, p. 171-186

This paper presents the coupling of freeze-core sampling with X-ray CT scanning for the analysis of the soil structure of fine-grained, low-cohesive soils. We used a medical scanner to image the 3D soil structure of the frozen soil cores, providing X-ray CT data at a millimetric resolution over freeze-cores that are up to 62.5 cm long and 25 cm wide. The obtained data and the changes in gray...

Université de Neuchâtel

Rock-Eval pyrolysis discriminates soil macro-aggregates formed by plants and earthworms

Schomburg, Andreas ; Verrecchia, Eric P ; Guenat, Claire ; Brunner, Philip ; Sebag, David ; Le Bayon, Renée Claire

In: Soil Biology & Biochemistry, 2018, vol. 117, p. 117-124

Plants and earthworms, as soil ecosystem engineers, play a crucial role during stabilisation of organic matter in soil through its incorporation into soil aggregates. It is therefore essential to better understand the mechanisms and interactions of soil engineering organisms regarding soil organic matter stabilisation. Several methods have already been successfully applied to differentiate soil...