Université de Neuchâtel

Heterogeneity of soil carbon pools and fluxes in a channelized and a restored floodplain section (Thur River, Switzerland)

Samaritani, Emanuela ; Shrestha, J. ; Fournier, Bertrand ; Frossard, E. ; Gillet, François ; Guenat, Claire ; Niklaus, P. A. ; Pasquale, N. ; Tockner, K. ; Mitchell, Edward A. D. ; Luster, J.

In: Hydrogeology and Earth System Sciences, 2011, vol. 15, p. 1757-1769

Due to their spatial complexity and dynamic nature, floodplains provide a wide range of ecosystem functions. However, because of flow regulation, many riverine floodplains have lost their characteristic heterogeneity. Restoration of floodplain habitats and the rehabilitation of key ecosystem functions, many of them linked to organic carbon (C) dynamics in riparian soils, has therefore become a...

Université de Neuchâtel

Situation de la vigne sauvage Vitis vinifera ssp. silvestris en Europe = Occurrence ofthe wild vine Vitis vinifera ssp. silvestris m Europe

Arnold, Claire ; Gillet, François ; Gobat, Jean-Michel

In: Vitis, 1998, vol. 37, no. 4, p. 159-170

Cette contribution dresse un bilan de la répartition actuelle de la vigne sauvage européenne - Vitis vinifera L. ssp. silvestris (Gmelin) Hegi - sur la base d'une revue bibliographique et d'observations originales effectuées lors de recherches sur son écologie dans les forêts alluviales et colluviales d'Europe. La situation de la vigne sauvage s'avère préoccupante dans la...

Université de Neuchâtel

Is there a future for wild grapevine (Vitis vinifera subsp. silvestris) in the Rhine Valley?

Arnold, Claire ; Schnitzler, Annik ; Douard, Anne ; Peter, Richard ; Gillet, François

In: Biodiversity & Conservation, 2005, vol. 14, no. 6, p. 1507-1523

The wild grapevine, Vitis vinifera subsp. silvestris (Gmelin) Hegi, is considered to be an endangered taxon in Europe, mainly as a consequence of the introduction of pathogens from North America and of the destruction of its habitat. In the Rhine Valley, nearly all populations disappeared due to river management, the intensi.cation of forestry, and the introduction of phylloxera....

Université de Neuchâtel

Soil Microbial Community Changes in Wooded Mountain Pastures due to Simulated Effects of Cattle Grazing

Kohler, Florian ; Hamelin, Jérôme ; Gillet, François ; Gobat, Jean-Michel ; Buttler, Alexandre

In: Plant and Soil, 2005, vol. 278, no. 1-2, p. 327-340

The effect of cattle activity on pastures can be subdivided into three categories of disturbances: herbage removal, dunging and trampling. The objective of this study was to assess separately or in combination the effect of these factors on the potential activities of soil microbial communities and to compare these effects with those of soil properties and plant composition or biomass. Controlled...

Université de Neuchâtel

Effect of cattle activities on gap colonization in mountain pastures

Kohler, Florian ; Gillet, François ; Gobat, Jean-Michel ; Buttler, Alexandre

In: Folia Geobotanica, 2006, vol. 41, no. 3, p. 289-304

Cattle influences gap dynamics in pastures in two ways: (1) by creating gaps and (2) by affecting the colonization process. This effect of cattle activity on gap revegetation can be subdivided in three main factors: herbage removal, trampling and dung and urine deposition. The objective of this study was to assess how these three effects moderate the plant succession following gap creation. ...