A Region bacterivore omnivore plant parasite eukaryvore ● ● ● 20 40 ● ● ● 60 ● ● ● ● ● 40 15 ● 30 ● ● ● ● 40 ● ● ● 10 ● ● 20 ● ● ● 20 Relative abundance (%) 5 20 0 b a b 10 c b a a a a a a a Alb Hainich Schorfheide Alb Hainich Schorfheide Alb Hainich Schorfheide Alb Hainich Schorfheide B soil type bacterivore omnivore plant parasite eukaryvore ● ● ● ● ● 20 40 ● ● ● ● ● ● 60 ● ● ● ● 40 ● 15 ● ● ● ● 30 ● ● ● ● ● ● ● ● ● ● ● ● ● ● 40 ● ● ● ● ● ● ● 20 10 ● ● ● ● ● ● ● ● ● 20 ● ● Relative abundance (%) ● ● 20 5 0 10 b ac ab a bc bc ab ab b b ab ab a a ab ab a a a a a a a a a a a a a a a a Luvisol Luvisol Luvisol Luvisol Vertisol Vertisol Vertisol Vertisol Gleysol Gleysol Gleysol Gleysol Histosol Histosol Histosol Histosol Leptosol Leptosol Leptosol Leptosol Cambisol Cambisol Cambisol Cambisol Stagnosol Stagnosol Stagnosol Stagnosol Albeluvisol Albeluvisol Albeluvisol Albeluvisol C land usage bacterivore omnivore plant parasite eukaryvore ● ● ● ● ● 40 20 ● ● 60 ● ● ● ● ● 40 ● ● 15 ● 30 ● ● 40 ● ● ● ● ● 20 ● ● 10 ● ● 20 ● Relative abundance (%) 20 5 10 0 a a a a a a b a a a a a pasture mowed meadow pasture mowed meadow pasture mowed meadow pasture mowed meadow meadow meadow meadow meadow D LUI bacterivore omnivore plant parasite eukaryvore ● ● ● ● ● 40 ● ● ● ● ● 20 60 ● ● ● ● 40 ● ● ● ● 30 ● 15 ● ● ● ● 40 ● ● ● ● 20 ● ● ● 20 ● 10 Relative abundance (%) ● 20 ● ● 10 0 ● b a b b a a a c b 5 b a a ● low moderate high low moderate high low moderate high low moderate high E C/N ratio bacterivore omnivore plant parasite eukaryvore ● ● ● 20 ● 40 ● ● ● ● 60 ● ● 40 15 ● ● ● ● ● ● 30 ● ● ● ● 40 ● 10 ● ● ● ● 20 ● ● ● 20 Relative abundance (%) 5 20 a a a 10 b a a 0 a b b b a a - >10 - 15 ~10 7 - <10 >10 - 15 ~10 7 - <10 >10 - 15 ~10 7 - <10 >10 - 15 ~10 7 - <10 Figure S4. Boxplots of the variation of the relative abundances of the four main nutrition modes of Cercozoa and Endomyxa in grassland, colored according to region (approx. %). A. by region; B. by soil type, only Cambisoil occurs in the three regions; C. by grassland management; D. by land use intensity (LUI) index, transformed into a categorical variable according to quantiles. E. by C/N ratio, transformed as in D. The y-scale varies between graphs. Red letters: a change from “a” to “b”, or “c” indicates a significant difference (multiple comparison of means, Tukey's test); two or three letters (e.g. “ab” or "abc") indicate non-significant differences between plots sharing those letters. Red lines indicate the mean. Right side, tables with the regional repartion of each factor; 100 sites in Alb, 96 in Hainich and 97 in Schorfheide..