Fig. 1

Mean values and standard errors of the presented diversity indices in German forests by stand type (see Table 1), as well as for the whole sample (all stand types). Bt: all other broadleaved tree species; Ct: all other coniferous tree species. *Significant changes between 2002 (NFI 2) and 2012 (NFI 3) with a probability of error equal to or less than 5%