Plant community effects on nematodes.

F-values of GLMs for the effect of block (BL), plant species richness (SR), plant functional group richness (FG), presence/absence of grasses (GR), small herbs (SH), tall herbs (TH) and legumes on total nematode density and on the density of different trophic groups of nematodes (autumn 2005 and spring 2007), the ratio between fungal feeders (FF) and bacterial feeders (BF; autumn 2005 and spring 2007), the ratio between FF+BF and plant feeders (PF), the ratio between predators (PR) and plant feeders, nematode taxon richness, nematode taxon richness of rare, intermediate and common taxa, and of taxa belonging to different colonizer-persister groups [12], [34], Shannon-Wiener index, maturity index, channel index enrichment index and structure index (all in autumn 2005).Significant effects (P≤0.05) are given in bold. n2005 = 73, n2007 = 22, degrees of freedom: BL = 3 (2005) or 1 (2007), SR, FR, GR, SH, TH, LE = 1;↑ = increase with increasing plant species richness,↓ = decrease in the presence of a certain plant functional group,*** = P≤0.001,** = P≤0.01,* = P≤0.05.