. 2018 Oct 30;9:1586. doi: 10.3389/fpls.2018.01586

Table 2.

Overview of the outcome of the statistical analyses (ANCOVA) for the response variables 1 and 2 years after the 2013 extreme.

		2014						2015
		VPD		Irrig		VPD x Irrig		VPD		Irrig		VPD x Irrig
	group	F_{1, 2}	P	F_{1, 42}	P	F_{1, 42}	P	F_{1, 2}	P	F_{1, 42}	P	F_{1, 42}	P
Biomass	all	43.92	0.022	1.79	0.188	2.67	0.110	0.00	0.975	2.22	0.144	0.22	0.642
	graminoids	12.11	0.074	1.17	0.286	0.28	0.603	4.36	0.172	0.13	0.721	0.32	0.573
	forbs	8.81	0.097	2.87	0.098	8.40	0.006	0.60	0.519	10.98	0.002	4.67	0.036
Necromass	all	0.17	0.723	1.60	0.213	0.17	0.680	0.00	0.985	0.80	0.376	0.02	0.883
Phytomass	all	51.31	0.019	1.79	0.199	2.59	0.115	0.00	0.988	2.31	0.136	0.20	0.66
Green cover		10.30	0.085	23.60	<0.001	3.4	0.072	6.39	0.127	9.82	0.003	4.42	0.041
Species richness	total							2.25	0.272	4.22	0.046	4.06	0.05
	graminoids							0.81	0.462	0.00	0.947	0.27	0.609
	forbs							3.41	0.206	5.54	0.023	6.20	0.017

The site-specific average daytime vapor pressure deficit (VPD) during the 2013 extreme was used as a continuous fixed factor, the irrigation treatment in 2013 (Irrig) as a categorical fixed factor, and monolith (nested within site) as a random factor. F-values (including degrees of freedom) and P-values are given with significant (P < 0.05) or marginally significant (P < 0.10) indicated in bold.