The young growth stem distributions in a 115 year old beech stand in the Sihlwald (Switzerland) and in a virgin beech stand in Uholka (Ukraine) show conspicuous sinks in the 130,0 to 169,9 cm tree height range. A model shows, that these sinks can be the result of height growth differences be tween trees in different height classes. Technical reasons of the surveys may accentuate the sinks. There may be more reasons which could play a role but these were not investigated.

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