Table 3.

Linear mixed-effects model results at the fungal species level. Effect of tree diversity among neighbouring trees on fungal infestation of host-specific fungal species 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: T. cordata: Passalora microsora = < 0.1% and 28.9%, Apiognomonia errabunda = 0.18% and < 0.1%, Asteromella tiliae = 1.8% and 15.7%, Species of Ascomycota = < 0.1% and 8.0%; Q. petraea: Erysiphe alphitoides = 3.0% and 11.9%; Erysiphe hypophylla = < 0.1% and 21.9%, Species of Ascomycota = < 0.1% and 19.4%, Zygosporium sp. = < 0.1% and 13.5%, Ramichloridium sp. = 9.5% and 16.2%

Explanatory variable	Tilia cordata
	Passalora microsora		Apiognomonia errabunda		Asteromella tiliae		Species of Ascomycota
	F	P	F	P	F	P	F	P
Intercept	444.11	< 0.001	2.407	0.122	10.695	0.001	230.307	< 0.001
Tree diversity (TD)	3.619	0.058	0.181	0.671	0.095	0.759	5.087	0.025
Year	33.444	< 0.001	0.772	0.463	2.231	0.11	0.001	0.999
TD × Year	0.498	0.608	1.351	0.261	4.369	0.014	6.253	0.002

	Quercus petraea
Erysiphe alphitoides		Erysiphe hypophylla		Species of Ascomycota		Zygosporium sp.		Ramichloridium sp.
F	P	F	P	F	P	F	P	F	P
Intercept	18.787	< 0.001	188.949	< 0.001	223.521	< 0.001	138.457	< 0.001	51.206	< 0.001
Tree diversity (TD)	3.241	0.073	7.874	0.005	0.031	0.86	0.344	0.558	0.234	0.629
Year	20.807	< 0.001	15.655	< 0.001	71.802	< 0.001	62.608	< 0.001	73.187	< 0.001
TD × Year	0.845	0.431	0.828	0.438	0.501	0.607	1.138	0.322	0.363	0.696