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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

Structure of microbial communities in Sphagnum peatlands and effect of atmospheric carbon dioxide enrichment

Mitchell, Edward A. D. ; Gilbert, Daniel ; Buttler, Alexandre ; Amblard, Christian ; Grosvernier, Philippe ; Gobat, Jean-Michel

In: Microbial Ecology, 2003, vol. 46, no. 2, p. 187-199

Little is known about the structure of microbial communities in Sphagnum peatlands, and the potential effects of the increasing atmospheric C02 concentration on these communities are not known. We analyzed the structure of microbial communities in five Sphagnum-dominated peatlands across Europe and their response to C02 enrichment using miniFACE systems. After...

Université de Neuchâtel

Horizontal Distribution Patterns of Testate Amoebae (Protozoa) in a Sphagnum magellanicum Carpet

Mitchell, Edward A. D. ; Borcard, Daniel ; Buttler, Alexandre J. ; Grosvernier, Philippe ; Gilbert, Daniel ; Gobat, Jean-Michel

In: Microbial Ecology, 2000, vol. 39, no. 4, p. 290-300

The distribution of soil microorganisms is generally believed to be patchy and to reflect habitat heterogeneity. Despite this general rule, the amount of existing data on species distribution patterns is scarce. Testate amoebae (Protozoa; Rhizopoda) are an important component of soil microbial communities and are increasingly used in ecological and paleoecological studies of...

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...