Affiner les résultats

Type de document

Collection spécifique


Université de Neuchâtel

Review: From multi-scale conceptualization to a classification system for inland groundwater-dependent ecosystems

Bertrand, G ; Goldscheider, Nico ; Gobat, Jean-Michel ; Hunkeler, Daniel

In: Hydrogeology journal, 2012, vol. 20, p. 5-25

Aquifers provide water, nutrients and energy with various patterns for many aquatic and terrestrial ecosystems. Groundwater-dependent ecosystems (GDEs) are increasingly recognized for their ecological and socio-economic values. The current knowledge of the processes governing the ecohydrological functioning of inland GDEs is reviewed, in order to assess the key drivers constraining their...

Université de Neuchâtel

Are urban soils similar to natural soils of river valleys?

Amossé, Joël ; Le Bayon, Renée-Claire ; Gobat, Jean-Michel

In: Journal of Soils and Sediments, 2015, vol. 15, no. 8, p. 1716-1724

Purpose Urban soils and soils of river valleys are constituted of heterogeneous materials that have been manipulated, disturbed or transported at different spatial and temporal scales. Despite these similarities, little is known about soil evolution in urban soils and their comparison with natural soils remains therefore highly useful. We hypothesized that, according to their degree of...

Université de Neuchâtel

Effects of endogeic earthworms on the soil organic matter dynamics and the soil structure in urban and alluvial soil materials

Amossé, Joël ; Turberg, Pascal ; Kohler-Milleret, Roxane ; Gobat, Jean-Michel ; Le Bayon, Renée-Claire

In: Geoderma, 2015, vol. 243-244, p. 50-57

Earthworms are considered as key actors of soil processes at different spatial and temporal scales and provide essential ecosystem services linked to climate regulation or primary production. However, little is known about their basic functional roles (e.g. organic matter decomposition, soil structuring processes) in perturbed systems such as urban or alluvial soils. Alluvial soils are...

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

Spatio-temporal pattern of bog pine (Pinus uncinata var. rotundata) at the interface with the Norway spruce (Picea abies) belt on the edge of a raised bog in the Jura Mountains, Switzerland

Freléchoux, François ; Buttler, Alexandre ; Schweingruber, Fritz H. ; Gobat, Jean-Michel

In: Annals of Forest Science, 2004, vol. 61, no. 4, p. 309-318

Réactions spatio-temporelles du pin à crochets (Pinus uncinata var. rotundata) à l'interface d'une ceinture d'épicéas (Picea abies) sur la marge d'un haut-marais de la chaîne jurassienne, Suisse. Dans un site de haut-marais en voie de paludification, un peuplement de pins dépérit, ce qui est actuellement peu fréquent à l'échelle du Jura suisse. Un transect a été établi dans la...

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...

Université de Neuchâtel

Spatial and Seasonal Patterns of Cattle Habitat use in a Mountain Wooded Pasture

Kohler, Florian ; Gillet, François ; Reust, Stéphanie ; Wagner, Helene H. ; Gadallah, Fawziah ; Gobat, Jean-Michel ; Buttler, Alexandre

In: Landscape Ecology, 2006, vol. 21, no. 2, p. 281-295

Management-oriented models of cattle habitat use often treat grazing pressure as a single variable summarizing all cattle activities. This paper addresses the following questions: How does the spatial pattern of cattle effects vary between cattle activities in a highly heterogeneous landscape? Do these patterns change over the grazing season as forage availability decreases? What are the...