Table 5 Summary of the selection process of the principal components and the fitting statistics of the forward stepwise regression
From: Alternative approaches to assessing the natural regeneration of Scots pine in a Mediterranean forest
Model | Fixed effects | Random Effect | Log-likelihood | Compared to model | Pr > (Chi) |
|---|---|---|---|---|---|
(0) | Intercept | – | −543.56 | – | – |
(1) | Intercept | Plot | −512.74 | (0) | <0.001 |
(2) | Intercept | Plot/transect | −512.40 | (1) | 0.412 |
(3) | PC1 com | Plot | −512.55 | (1) | 0.540 |
(4) | PC2 com | Plot | −508.86 | (1) | 0.005 |
(5) | PC2 com + PC1 ed | Plot | −508.20 | (4) | 0.252 |
(6) | PC2 com + PC2 ed | Plot | −507.81 | (4) | 0.147 |
(7) | PC2 com + altitude | Plot | −508.86 | (4) | 0.950 |
(8) | PC2 com + slope | Plot | −508.07 | (4) | 0.209 |