Université de Fribourg

Including community composition in biodiversity–productivity models

Sandau, Nadine ; Rohr, Rudolf P. ; Naisbit, Russell E. ; Fabian, Yvonne ; Bruggisser, Odile T. ; Kehrli, Patrik ; Aebi, Alexandre ; Bersier, Louis-Félix

In: Methods in Ecology and Evolution, 2014, vol. 5, no. 8, p. 815–823

Studies on biodiversity and ecosystem functioning (BEF) have elicited debate over the interpretation of the positive relationship between species richness and plant productivity. Manipulating richness cannot be achieved without affecting composition; it is thus essential to consider the latter in statistical models.We firstly review existing approaches that use species richness as an explanatory...

Université de Fribourg

The importance of landscape and spatial structure for hymenopteran-based food webs in an agro-ecosystem

Fabian, Yvonne ; Sandau, Nadine ; Bruggisser, Odile T. ; Aebi, Alex ; Kehrli, Patrik ; Rohr, Rudolf P. ; Naisbit, Russell E. ; Bersier, Louis-Félix

In: Journal of Animal Ecology, 2013, vol. 82, no. 6, p. 1203–1214

Understanding the environmental factors that structure biodiversity and food webs among communities is central to assess and mitigate the impact of landscape changes. Wildflower strips are ecological compensation areas established in farmland to increase pollination services and biological control of crop pests and to conserve insect diversity. They are arranged in networks in order to favour...