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Druhová diverzita bylinného patra lesů 3. LVS s různou příměsí modřínu evropského (ŠLP Křtiny, polesí Vranov)
Keclíková, Jarmila
The aim of this work was to describe whether the European larch (Larix decidua) allows species diversity in the forest herbaceous layer (3rd forest vegetation zone, FVS) on the territory of the Masaryk Forest Křtiny School Enterprise, Vranov Forest. In the Vranov forest, stand groups with larch and control deciduous stand groups were selected according to criteria taking into account the composition of the stand and the abiotic properties of the environment. Phytocenological samples were recorded so the larch was present in the tree layer or not. A mixed soil sample was taken in each sample. Differences in the herb species composition were compared in terms of diversity indices, Ellenberg indication values, especially light, soil pH, fidelity and number of species. A significant difference was found in the species diversity of seedlings, which was significantly lower in larch stands, overall, a higher diversity of the herbaceous layer of deciduous stands was found. Larch stands have been shown to be accompanied by more light-intensive species, ruderal (nitrophilous), indicating soil disturbance. In contrast, the species of deciduous stands are predominantly mesotrophic to naturally nitrophilous, indicating humus soils. With increasing larch cover, there was a tendency for increasing higher species diversity of herbs, decreasing seedling diversity and increasing demands on moisture. Adding larch to the stand probably affects the natural regeneration of the forest and changes the species composition of the herbaceous layer towards nitrophilous species.
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