Table 1 Tree wood and structure parameters used as supplementary variables in the principal component analysis (PCA) and their correlations with the first two PCA axes.

From: Leveraging Signatures of Plant Functional Strategies in Wood Density Profiles of African Trees to Correct Mass Estimations From Terrestrial Laser Data

Parameter

Definition

PCA1

PCA2

WDStu

WD of the stump compartment

−0.71 (***)

0.17 (***)

WDGWD

Species average WD derived from the Global Wood Density database

−0.65 (***)

0.23 (***)

VWWD

Volume-weighted tree wood specific gravity

−0.51 (***)

0.4 (***)

DBH

Diameter at breast height

0.17 (***)

0.32 (***)

H

Total height

0.08 (*)

0.27 (***)

Ht

Trunk height

0.06 (ns)

0.05 (ns)

Cr

Crown radius

0.13 (***)

0.29 (***)

Sm

Stem morphology, defined as the ratio of trunk height over tree height

−0.07 (ns)

−0.24 (***)

  1. The probability values of Pearson correlation (r) tests are provided between brackets and coded as follows: ***P ≤ 0.001, **P ≤ 0.01, *P ≤ 0.05, ns = nonsignificant.
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