Effect of the size category, year of death, locality, habitat type (position on the slope) and their interactions on the number of dead trees assessed using generalized linear models with a Poisson distribution.

The number of living trees in the observed plot was used as a covariate to account for differences in the plot size and tree density between plots and is therefore not included in any interaction term. No four-fold or higher interactions were significant, and these interactions are therefore not shown.