Table 1.

Results from the nested analyses of variance of treatment effects on the biomass (g/m²) of plant functional groups in low shrub tundra, Kangerlussuaq, Greenland

	Source of variation
Variable	W		E		Y		E*W		E*W*Y
	F	p	F	p	F	p	F	p	F	p
B. nana leaf	1.051	0.332	1.677	0.221	10.546	0.003a	3.365	0.099	0.627	0.771
B. nana stem	0.330	0.579	2.460	0.130	8.780	0.004a	24.907	0.001a	0.122	0.999
Graminoids	4.363	0.065	0.074	0.789	100.602	<0.001a	0.517	0.490	0.228	0.990
Forbs	1.777	0.215	0.000	0.985	10.216	0.003a	3.730	0.085	0.646	0.754

W: warming treatment, E: exclosure treatment, Y: year. ^a marks significance level of p ≤ 0.05.