Fig. 2

Sensitivity of model growth, felling + mortality and recruitment parameters, and sensitivity of the total number of trees / ha (Nha) model output variable to stratification factors NFI region, tree species composition and stand structure, and their interactions. NFI region had 9 levels (NFI region = 1–9, Fig. 1), species composition had 3 levels (broadleaf-dominated, conifer-dominated and broadleaf-conifer mixed stands) and stand structure had 2 levels (high forest and high-coppice forest mixture). Sensitivity measurements for the parameters are given by tree diameter (at breast height, over bark) class. Diameter classes are indicated by their lower limit, starting from the 7.5 cm-limit, and each has a width of 10 cm. Sensitivity measurements for growth and felling + mortality parameters in diameter classes [47.5, 57.5[ cm and [57.5, 67.5[ cm were less reliable as not all combinations of stratification factor levels were available for calculation. Sensitivity measurements for diameter classes ≥67.5 cm are not given. Recruitment occurred only in the first diameter class (lower limit = 7.5 cm). Sensitivity measurements for Nha are given every 5 years from 2007 (NFI data) to year 2027 (20-year projection). (1) stands for no unit