Seasonal changes in the number of consumed prey species for sticklebacks and whitefish in Lake Constance. Non-metric multidimensional scaling (NMDS) ordination plots for whitefish (A) and stickleback (B) data based on Bray-Curtis similarities. An NMDS ordination plot of bootstrapped averages for both species (C). Vectors indicate the direction and strength of individual prey species on orientation (Pearson correlation).