Table 1.

Linear mixed-effects model results at the tree species level. Effect of tree diversity among neighbouring trees on fungal species richness and fungal infestation for the tree species Tilia cordata and Quercus petraea across all tree individuals of each tree species (n = 282) within the years 2010–2012. d.f. = 233. F and P refer to the ratio of explained to random variance and error probability, respectively. Significant results are indicated in bold. Variance of the random factors block and plot, respectively: Fungal species richness T. cordata = 2.9 % and 12.1%, Q. petraea = 2.5% and 25.6%; Fungal infestation T. cordata = < 0.1% and 27.4 %, Q. petraea = < 0.1% and 22.5%

Response variable	Explanatory variable	Tilia cordata		Quercus petraea
		F	P	F	P
Fungal species richness	Intercept	922.426	< 0.001	417.423	< 0.001
	Tree diversity (TD)	4.055	0.045	2.69	0.102
	Year	1.761	0.174	233.196	< 0.001
	TD × Year	7.562	0.001	0.954	0.387
Fungal infestation	Intercept	507.3	< 0.001	220.135	< 0.001
	Tree diversity (TD)	4.03	0.046	8.389	0.004
	Year	31.429	< 0.001	28.296	< 0.001
	TD × Year	1.01	0.366	1.075	0.343