Popis článkuZmeny v druhovom zložení dubových lesov v oblasti Poľany po viac ako 40 rokoch.
[Changes in plant species composition of oak forests in Poľana massif (Central Slovakia) after 40 years] 168 - 177.
|Název článku:||Zmeny v druhovom zložení dubových lesov v oblasti Poľany po viac ako 40 rokoch|
The objective of this study is the vegetation dynamics of oak (Quercus petraea agg.) dominated forests in the Poľana volcanic massif. Changes in species composition were investigated using two sets of phytosociological relevés sampled on the same plots in two periods: 1963 – 1964 and 2005. However, overall canopy openness increased, mostly light-demanding species decreased. It was caused by occupation of lower tree layers by shade tolerant tree species with dense crown such as Fagus sylvatica and Carpinus betulus. Despite of these local shading effects many canopy gaps still remain with numerous occurrence of heliophytes. The overall diversity of oak forests declined, probably due to the elimination of human caused activities such grazing or raking of litter.