Table 1.

Linear regression models testing the relationship between microbial (log transformed) ecosystem functions and the standardized mean phylogenetic distance (MPD), and standardized mean nearest taxon index (MNTD)

	Phylogenetic diversity through the entire tree (MPD)	Phylogenetic diversity at the shallow clade depths (MNTD)	MPD × MNTD
Microbial biomass	−0.33 ± 0.08**	0.19 ± 0.13	0.02 ± 0.03 R2 = 0.76
Microbial activity	−0.23 ± 0.05**	0.08 ± 0.08	−0.02 ± 0.01 R2 = 0.76
Decomposition	−0.40 ± 0.09**	0.08 ± 0.15	−0.03 ± 0.03 R2 = 0.74
C cycling	−0.49 ± 0.10**	0.10 ± 0.16	−0.04 ± 0.03 R2 = 0.79
P cycling	−0.29 ± 0.09*	0.14 ± 0.14	0.02 ± 0.03 R2 = 0.69
N cycling	−0.19 ± 0.05*	0.25 ± 0.09*	−0.003 ± 0.021 R2 = 0.80

The slope and SE of each variable and the percentage of variance explained in each model (R²) are shown. **p < 0.001; *0.001 < p < 0.01