Figure S9 Elevational variation of litter C concentration (a), litter N concentration (b), litter P concentration (c), litter C:N ratio (CNR, d), litter C:P ratio (CPR, e), litter N:P ratio (NPR, f), root C concentration (g), root N concentration (h), root P concentration (i), root C:N ratio (CNR, j), root C:P ratio (CPR, k), root N:P ratio (NPR, l) from 400 m to 1100 m.