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Consortium of Swiss Academic Libraries

Tetrahedral forms in monoidal categories and 3-manifold invariants

Geer, Nathan ; Kashaev, Rinat ; Turaev, Vladimir

In: Journal für die reine und angewandte Mathematik (Crelles Journal), 2012, vol. 2012, no. 673, p. 69-123

Université de Fribourg

Species richness-environment relationships of european arthropods at two spatial grains: habitats and countries

Entling, Martin H. ; Schweiger, Oliver ; Bacher, Sven ; Espadaler, Xavier ; Hickler, Thomas ; Kumschick, Sabrina ; Woodcock, Ben A. ; Nentwig, Wolfgang

In: PLoS ONE, 2012, vol. 7, no. 9, p. e45875

We study how species richness of arthropods relates to theories concerning net primary productivity, ambient energy, water-energy dynamics and spatial environmental heterogeneity. We use two datasets of arthropod richness with similar spatial extents (Scandinavia to Mediterranean), but contrasting spatial grain (local habitat and country). Samples of ground-dwelling spiders, beetles, bugs and...

Université de Fribourg

Benefits of host genetic diversity for resistance to infection depend on parasite diversity

Ganz, Holly H. ; Ebert, Dieter

In: Ecology, 2010, vol. 91, no. 5, p. 1263–1268

Host populations with high genetic diversity are predicted to have lower levels of infection prevalence. This theory assumes that host genetic diversity results in variation in susceptibility and that parasites exhibit variation in infectivity. Empirical studies on the effects of host heterogeneity typically neglect the role of parasite diversity. We conducted three laboratory experiments...