A Veszprém Megyei Múzeumok Közleményei 12. (Veszprém, 1973)

Szodfridt István–Tallós Pál: Vegetációtanulmányok a Felsőnyirádi-erdőben

STUDIES IN VEGETATION IN THE FELSÖ-NYIRÁD FOREST Authors publish the descriptions of high-sedgy, marshy, boggy and other meadow plant associations surveyed during vegetation studies carried out in the Felső-Nyirád forest (SW of Bakony Mts.). The descriptions are complemented with tables, and attention is drawn to those ecological factors which decisively influence the formation of the individual associations. The new results include descriptions of the following: Caricetum elatae (KERNER 1858) W. KOCH 1926 Phalaris arundinacea consociation, Caricetum alatae (KERNER 1858) W. KOCH 1926 Carex hartmani consociation, Caricetum elatae (KERNER 1858) W. KOCH 1926 calamagrostetosum canescentis SZODFRIDT et TALLÖS subassociation, Caricetum acutiformis-ripariae SOÓ (1927) 1930 schoenoplectetosum lacustris SZODFRIDT et TALLÖS subassociation, Molinietum litoralis SZODFRIDT et TALLÔS association nova. Caricetum elatae calamagrostetosum canescentis subassociation is a complex, transformation stage of a highsedgy association. On the top of the drying rush-bed brought into being by Carex elatae, Calamagrostis canescens becomes dominant and Carex elatae may subsist only on the sides of the tussocks. In the fen windows between the rush-beds Carex vesicaria is domineering. The differential species of the subassociation are Peucedanum palustre, Calamagrostis canescens, Lemna minor. The biotope of the subassociation Caricetum acutiformis-ripariae schoenoplectetosum lacustris is moister, still water-depth rarely reaches 0.5 metre. The floating plants in this case play but an inferior role, but simultaneously several Magnocaricion elements appear. The species composition of the association is heterogeneous. Its differential species are Oenanthe aquatica, Potamogeton lucens, Schoenoplectus lacustris. As forest cutting association the Molinietum litoralis appears after the cutting down of Turkey oak-robur forests. Because it is growing on a pseudogley brown forest soil, it is found on a double water-managed biotope (Wechselfeucht). The double water-management is also revealed in the composition of its plants: drought-resistant and water-loving, and species occurring in stagnant water biotopes may be found side by side. Characteristic species: Hypericum barbatum, Molinia litoralis, we have to also include into this list Ophrys fuciflora and Spiralis surveyed in the Széki-forest SW from the Bakony Mts. Its constant species are Potentilla erecta, Galium verum, Succia pratensis, Betonica officinalis, Molinia litoralis. The newly described plant association belongs to the forest association of Epilobietalia angustifolii within this into the association group comprising basiphilic forest association of Atropion belladonnae. István Szodfridt and f Pál Tallós