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Table 2 Summary of mixed-models for the effects of climate (PET, MTCM, MI, and biome), leaf form (conifer or broadleaf), leaf phenology (evergreen or deciduous), forest types (secondary natural forest, primary natural forest, and plantation), stem density, forest age, and phylogeny groups (family, genus, and species) on L-D, S-D, and R-D allometric relationships. Bold indicates p < 0.05. Unnecessary variables were dropped based on AIC. %SS, percentage of sum squares explained; df degree of freedom, MS mean square

From: Effects of climate, biotic factors, and phylogeny on allometric relationships: testing the metabolic scaling theory in plantations and natural forests across China

  df MS p %SS
L-D scaling exponent
 MTCM 1 2.68 0.042 3.24
 Biome 3 1.35 0.101 4.87
 Stem density 1 1.87 0.089 2.26
 Residuals 117 0.63   89.63
S-D scaling exponent
 PET 1 0.02 0.669 0.09
 MTCM 1 0.70 0.024 2.76
 Biome 3 0.67 0.003 7.91
 Forest types 2 0.93 0.002 7.32
 Stem density 1 1.49 0.001 5.86
 Family 23 0.29 0.010 26.43
 Genus 10 0.16 0.899 6.12
 Species 24 0.14 0.985 13.30
 Residuals 59 0.13   30.21
R-D scaling exponent
 MI 1 0.00 0.957 0.00
 Forest types 2 0.95 0.010 8.20
 Stem density 1 1.97 0.002 8.54
 Family 20 0.42 0.017 36.16
 Genus 5 0.22 0.904 4.78
 Species 17 0.21 0.876 15.71
 Residuals 34 0.18   26.61