Table 4.

(S)MATR reduced major axis regression slopes and y-intercepts (α_RMA and log β_RMA, respectively) for log₁₀-tranformed data of forest-level above- and below-ground biomass (M_A and M_R, respectively) and stem and root biomass (M_S and M_R, respectively) (original units: tonnes dry mass per hectare). Data, grouped into those dominated by angiosperms or conifers, taken from Luo (1996) and Feng et al. (1999)

	αRMA (95% CI)	Log βPMA (95% CI)	r2
Angiosperm data set (n=714)
Log MA vs. log MR	1·03 (1·01, 1·06)	0·418 (0·393, 0·444)	0·944
Log MS vs. log MR	1·04 (1·01, 1·08)	0·366 (0·340, 0·392)	0·943
Conifer data set (n=787)
Log MA vs. log MR	1·10 (1·06, 1·14)	0·477 (0·425, 0·528)	0·751
Log MS vs. log MR	1·18 (1·13, 1·22)	0·331 (0·275, 0·388)	0·739

M_A vs. M_R or M_S vs. M_R scaling exponents in bold type have 95% CIs that numerically include those reported at the level of individual plants (α_RMA=1·06 and 1·08, respectively; see Niklas, 2005).