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In the study of vegetation changes in European beech (Fagus sylvatica L.) and Norway spruce (Picea abies (L.) Karst.) forests in the Orlické hory Mts. (the Sudetes range, Czech Republic), 34 research plots were surveyed in 1951–2011 using the seven-point Braun-Blanquet scale. The long-term research was motivated by studying the effects of the pollution disturbance in the mountains of the Sudetes system...
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