Table 2. Plant community effects in single years.

2004		BL	SR	FR	GR	LE	ER
Microorganisms		16.35 ***	0.35	1.31	12.87 ***	4.51 *	70
Mesofauna
	Collembola	0.06	18.28 ***	10.96 **	6.06 *	8.96 **	66
	Oribatida	0.62	1.42	0.96	4.52 *	0.62	66
Macrofauna
Density
	Decomposers	4.87 **	1.83	3.08	0.86	3.12	72
	Herbivores	3.14 *	11.40 **	11.16 **	0.01	0.89	71
	Predators	1.77	4.77 *	12.97 ***	0.03	0.28	72
Diversity
	Decomposers	4.83 **	0.4	1.37	0.32	2.82	72
	Herbivores	1.35	13.97 ***	11.73 ***	0.01	1.1	71
	Predators	0.6	11.35 **	15.22 ***	0.11	0.06	72

F-values of protected GLMs for the effects of Block (BL), plant species richness (SR), plant functional group richness (FR) and presence/absence of grasses (GR) and legumes (LE) on the biomass of microorganisms, the density of mesofauna as well as on the density and diversity of macrofauna decomposers, herbivores and predators in 2004, 2006 and 2008.

Significant effects (P<0.05) of plant community properties are given in bold.

***P<0.001,

**P<0.01,

*P<0.05. Degrees of freedom: BL = 3, SR, FR, GR, LE = 1 each. Error degrees of freedom (ER) are given in italics.