Fig. 2: Study design.

a a map of the six biogeographic regions of Switzerland. A mean digital elevation raster map (25-m resolution) is overlaid, in which brown values represent lower elevations, whiter values represent intermediate elevations, and grey values represent high elevations. The ranges represent the ranges of the raster map. b a network diagram visualising interactions between major groups in the trophiCH metaweb. The nodes represent the major groups, while the arrows represent their interactions. The width of the arrows represents the number of interactions shared between those groups. c lollipop plots of species richness (left) and interaction richness (left) of the 12 regional food webs in this present study. Grey lollipops represent the montane regions and brown lollipops represent the lowland regions. d a chord diagram illustrating the shared habitat associations of the species in the metaweb. The shared bands represent the number of species, increasing with bandwidth. The animal and plant icons were sourced from Flaticon.com.