Table 2. Summary of mixed effects models for resistance and proportional resistance of aboveground biomass after drought in August 2008 and 2009 to test for effects of diversity (numbers of initially sown species and functional group richness), management (separated into mowing and fertilizer amounts) and drought treatments.

		Resistance 2008				Resistance 2009					proportional Resistance 2008				proportional Resistance 2009
	df	AIC	L ratio	p		AIC	L ratio	p		df	AIC	L ratio	p		AIC	L ratio	p
Nullmodel	3	1026.667				1158.463				6	914.183				1025.004
Block	6	1028.312	4.355	0.2256		1157.890	6.573	0.0868		9	917.457	2.726	0.4358		1028.257	2.746	0.4324
Species richness (log-scale) = SR	7	1025.371	4.941	0.0262	*	1157.731	2.598	0.1417		10	918.179	1.278	0.2582		1030.178	0.080	0.7778
Number of functional groups = FG	8	1025.530	1.840	0.1749		1159.167	0.563	0.4529		11	919.132	1.047	0.3062		1032.016	0.161	0.6880
Mowing = M	9	1007.267	20.263	<0.0001	***	1145.509	15.658	0.0001	***	12	909.735	11.397	0.0007	***	1030.359	3.657	0.0558
M×SR	10	1007.980	1.287	0.2565		1147.369	0.141	0.7077		13	911.734	0.001	0.9757		1032.358	0.001	0.9788
M×FG	11	1008.535	1.445	0.2293		1149.119	0.250	0.6169		14	910.415	3.320	0.0685		1034.324	0.034	0.8534
Fertilizer amount = F	12	1010.209	0.325	0.5685		1150.820	0.298	0.5851		15	911.540	0.874	0.3498		1036.322	0.002	0.9626
F×SR	13	1011.601	0.608	0.4354		1151.880	0.940	0.3322		16	913.419	0.122	0.7272		1038.275	0.047	0.8290
F×FG	14	1010.700	2.901	0.0885		1152.796	1.084	0.2978		17	912.595	2.824	0.0929		1039.751	0.524	0.4689

Models were fitted by stepwise inclusion of variables and likelihood ratio tests (L ratio) were applied to assess statistical significance of variables (p-values). Significance is given with * = p<0.05, ** = p<0.01, *** = p<0.001; df = degrees of freedom.