Fig. 4

Beanplots of FSI distributions in different forest types – left half of beans represents NFI₂₀₀₂ and the right half of beans represents NFI₂₀₁₂; direct comparison of FSI for NFI₂₀₀₂ and NFI₂₀₁₂ per stand type as well as a comparison between different forest types; black lines indicate mean values of forest types; except of young conifer-dominated stands, all types of forests show an increase between the FSI-score for NFI₂₀₀₂ and NFI₂₀₁₂. All types of forests show significant differences between the two NFIs (t-test, confidence level of 0.95)