Fig. 4

3D-scatter of the multidimensional functional space of the body-mass dispersion of the nematodes occurring in our 200 soils. The three indices (axes x, y and z) provide together a common currency that closely mirrors environmental filtering and hence enables to assess the overall diversity of soil systems at farm level (each single point) and at categorical level (each management practice is functionally grouped in the niche space of the nematode traits). The body-mass dispersion of nematodes in their site-specific functional space can be assessed through the trait volume of the minimum convex hull that includes all communities