Table 2.

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

		P-values
Variable	Response	W	E	E*W
B. nana leaf	δp	0.862	0.291	0.097
	δs	0.898	0.056	0.225
	δc	0.751	0.191	0.716
B. nana stem	δp	0.512	0.093	0.594
	δs	0.698	0.887	0.895
	δc	0.609	0.965	0.864
Graminoids	δp	0.474	0.021a	0.188
	δs	0.696	0.995	0.960
	δc	0.802	0.916	0.993
Forbs	δp	0.891	0.484	0.293
	δs	0.738	0.509	0.725
	δc	0.297	0.736	0.875

δ_p: primary change 2003–2004, δ_s: secondary change 2005–2006, δ_c: cumulative change 2003–2006. W: warming treatment, E: exclosure treatment. ^a indicates significance at the p ≤ 0.05 level.