Unbiased estimations of alpha, beta and gamma Shannon diversity*D according to the partitioning procedure of Marcon et al.[19].

Given are the unbiased estimators for alpha and beta Shannon diversity for the single forest types; for all forests their weighted sums are given, as well as the resulting unbiased gamma Shannon diversity. These values have been calculated by additive partitioning of the Shannon entropy H; the calculation is given in Table S2. Upper and lower 95% confidence interval for the estimator of Shannon beta diversity in squared brackets, range of *Dβ: 1.0–4.0.