Table 6 Linear mixed model on the annual basal area growth (mm²·yr.⁻¹) of all analyzed trees (response variable) with the individual tree code as random effect and fixed effects growing site (urban and rural) and the de Martonne index with interactions, SD: Standard deviation, AIC: Akakike Information Criterion

A

Intercept

−7.14 ± 0.16

<  0.001

log(age)

Age

1.61 ± 0.01

<  0.001

Urbanity grade _ij

Grade of Urbanity

1.89 ± 0.19

<  0.001

log(M_ij)

De Martonne Index

0.04 ± 0.03

0.27

b x log(urbanity grade_ij) x log(age)

Grade of Urbanity x Age

−0.50 ± 0.02

<  0.001

b x urbanity grade_ij x log(M_ij)

Grade of Urbanity x de Martonne Index

−0.03 ± 0.04

0.38

Random effect d_ij

0.52

–

ε

0.17

–

AIC

− 2451.83

–