Table 1 Unstandardised coefficients resulting from the non-spatial multiple regression, without (Model 1) and with interaction terms (Model 2)

Altitude (ln)

32.8 (0.60)**

40.1 (0.73)**

Distance to the nearest fire (ln)

8.1 (0.14)**

8.4 (0.15)**

Soil type

Karst

43.2*

42.1*

Peat

19.2

25.7

Volcanic

16.8

22.7*

Land allocation zone

Forest limited production

19.4*

168.8**

Conservation forests

–14.5

–23.1

Production forests

16.5*

41.7

Watershed protection forests

17.1

114.3*

Interaction effects

Altitude (ln) x Forest limited production

–27.9**

Altitude (ln) x Conservation forests

–1.0

Altitude (ln) x Production forests

–6.6

Altitude (ln) x Watershed protection forests

–18.3*