Table 2.

Characteristics of the disturbance regime of Norway spruce mountain forest ecosystems of the Western Carpathian region. Disturbance chronologies were constructed using a three-decade running sum window of the percentage of canopy area disturbed for all plots.

Events by severity class	Return interval (years)	Mean severity (% canopy removed)	Proportion of canopy area disturbed (%)	Proportion of disturbance events (%)
All events	43	20.1	1	1
0–20% Low	66	8.7	28.1	65.2
20–40% Moderate	210	29.0	29.3	20.4
40–60% High	526	47.5	19.2	8.1
Over 60% Very high	690	74.9	23.1	6.2