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...

Université de Neuchâtel

Tidal rhythmites of the Marais Vernier Seine estuary, France and their implications for relative sea-level

Frouin, Millena ; Sebag, David ; Laignel, Benoit ; Ogier, Sylvie ; Verrecchia, Eric P. ; Durand, Alain

In: Marine Geology, 2006, vol. 235, no. 1-4, p. 165-175

The Marais Vernier, located in the upper reaches of the Seine River Estuary (northern France), preserves a thick Holocene succession of laminated detrital deposits and peats. The spectral analysis of one laminated deposit suggests that tidal processes were largely responsible for supplying sediments to this system. Two periods (16 and 32 laminae per cycle) were identified. These cycles can be...