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Biodiversity is rapidly declining, and this may negatively affect ecosystem processes, including economically important ecosystem services. Previous studies have shown that biodiversity has positive effects on organisms and processes across trophic levels. However, only a few studies have so far incorporated an explicit food-web perspective. In an(More)
Soil aggregate stability depends on plant community properties, such as functional group composition, diversity and biomass production. However, little is known about the relative importance of these drivers and the role of soil organisms in mediating plant community effects. We studied soil aggregate stability in an experimental grassland plant diversity(More)
The capacity of peripheral blood mononuclear cells (PBMCs) of anorexia nervosa (AN) patients to produce interleukin-1 (IL-1), interleukin-2 (IL-2), and interleukin-3-like activity (IL-3-LA) was studied. A significantly lower (-49%, p < 0.005) capacity to synthesize IL-2 and an almost significantly impaired ability (-35%, p = 0.058) to release IL-3-LA by(More)
The production of interleukin (IL)-1 beta, IL-6, tumor necrosis factor (TNF)-alpha, and IL-10 by peripheral blood mononuclear cells was examined in 13 children with and 11 children without any history of febrile convulsions. The results revealed an increase in all types of cytokine production by lipopolysaccharide-stimulated mononuclear cells from(More)
Cytokine production by peripheral blood mononuclear cells (PBMC) was assessed in 10 major depressed patients (5 men and 5 women) before and after 4 weeks of clomipramine treatment and in age- and gender-matched healthy controls. A significant reduction in interleukin-1B (IL-1B), interleukin-2 (IL-2) and interleukin-3-like activity (IL-3-LA) was observed in(More)
BACKGROUND One of the most significant consequences of contemporary global change is the rapid decline of biodiversity in many ecosystems. Knowledge of the consequences of biodiversity loss in terrestrial ecosystems is largely restricted to single ecosystem functions. Impacts of key plant functional groups on soil biota are considered to be more important(More)
Plant diversity drives changes in the soil microbial community which may result in alterations in ecosystem functions. However, the governing factors between the composition of soil microbial communities and plant diversity are not well understood. We investigated the impact of plant diversity (plant species richness and functional group richness) and plant(More)
Interleukin-1 beta (IL-1beta) and its endogenous IL-1 receptor antagonist (IL-1Ra) play an important role in inflammatory response and in pain modulation. It has recently been shown that polymorphism of the IL-1beta and IL-1Ra genes may account for variation in the production of these cytokines. The present study examined the hypothesis that polymorphism of(More)
Recent studies assessing the role of biological diversity for ecosystem functioning indicate that the diversity of functional traits and the evolutionary history of species in a community, not the number of taxonomic units, ultimately drives the biodiversity--ecosystem-function relationship. Here, we simultaneously assessed the importance of plant(More)