Université de Neuchâtel

Earthworm communities in alluvial forests : Influence of altitude, vegetation stages and soil parameters

Salomé, Clémence ; Guenat, Claire ; Bullinger-Weber, Géraldine ; Gobat, Jean-Michel ; Le Bayon, Renée-Claire

In: Pedobiologia, 2011, vol. 54S, p. S89-S98

In many terrestrial ecosystems, soil parameters usually regulate the distribution of earthworm communities. In alluvial ecosystems, few studies have investigated the impact of periodic floods and alluvium deposition on soil fauna. In this context, we assumed that earthworm communities may vary depending on altitude (alpine, subalpine, mountain and hill levels), forest successional stage...

Université de Neuchâtel

Impact of roots, mycorrhizas and earthworms on soil physical properties as assessed by shrinkage analysis

Milleret, Roxane ; Le Bayon, Renée-Claire ; Lamy, F. ; Gobat, Jean-Michel ; Boivin, P.

In: Journal of Hydrology, 2009, vol. 373, no. 3-4, p. 499-507

Soil biota such as earthworms, arbuscular mycorrhizal fungi (AMF) and plant roots are known to play a major role in engineering the belowground part of the terrestrial ecosystems, thus strongly influencing the water budget and quality on earth. However, the effect of soil organisms and their interactions on the numerous soil physical properties to be considered are still poorly understood....

Université de Neuchâtel

Influence of some physicochemical and biological parameters on soil structure formation in alluvial soils

Bullinger-Weber, G. ; Le Bayon, Renée-Claire ; Gobat, Jean-Michel ; Guenat, Claire

In: European Journal of Soil Biology, 2007, vol. 43, no. 1, p. 47-70

This study examines the role of abiotic (texture, calcium carbonates or iron) and biotic parameters (earthworm and enchytraeid activities) on the initial phases of soil aggregation. Our research focused on humus forms in alluvial soils, which are considered as young and heterogeneous environments. We hypothesized that the soil structure formation is determined by both the nature of the recent...