Figure 3. Differences in trophic group and class abundances between soil food webs in forests and grasslands . Colours indicate the significance of Wilcoxon tests calculated for the difference in abundances of each group between habitats (p<0.05) while node sizes are proportional to significant abundance differences. A Wilcoxon test was also applied to compare differences in trophic class abundances (dashed circles) between habitats. Abundance of trophic classes correspond to the sum of trophic groups relative abundances.