Table 2.

	Regression equation	r2	p	n
Climatic variables only
fine roots	lnk = −0.742 + 0.005 MAT	0.03	0.003	266
coarse roots	lnk = −1.816 + 0.106 MAT + 0.000 MAP	0.59	0.000	71
Root initial chemistry variables only
fine roots	lnk = 1.342–0.070 Lignin	0.66	0.000	17
coarse roots	lnk = 1.007–0.037 Lignin/N	0.62	0.000	25
Combined climate and root initial chemistry
fine roots	lnk = −0.425 + 0.023 MAT—0.021 Lignin	0.13	0.002	104
coarse roots	lnk = −2.384 + 0.149 MAT + 0.000 MAP—0.01 Lignin/N	0.86	0.000	33

Multiple stepwise regressions of climate, initial root chemistry, and the interaction of climate and chemistry on fine and coarse root decay constants k. r² and n represent the determinant index and sample numbers, respectively. Regressions are significant at p  < 0.05.