Phytosociological description of Fagus sylvatica forests in the Raša Valley (SW Slovenia) / Fitocenološki opis bukovih gozdov v dolini Raše (jugozahodna Slovenija)
DOI:
https://doi.org/10.3986/fbg0051Abstract
Abstract
The paper discusses and supplements the knowledge of the phytosociological composition of Fagus sylvaticaforests in the Raša Valley, on the northeastern edge of the Karst, or more specifically, in the area between the plateau of Vrhe, the Senožeče lowland and the Karst. They are classified into two associations, Seslerio autumnalis-Fagetumand Hacquetio-Fagetum. A new subassociation (-lamietosum orvalae) and a new geographical subvariant (subvar. geogr. Helleborus istriacus) were determined for the association Hacquetio-Fagetum. Although they occupy small areas these beech forests are an important part of the predominantly oak and hop hornbeam forest vegetation of the Karst, constituting a Natura 2000 habitat type Illyrian Fagus sylvaticaforests (Aremonio-Fagion). They are threatened by climate change and excessive logging.
Key words: phytosociology, synsystematics, Aremonio-Fagion, Hacquetio-Fagetum, Raša, Kras, Slovenia
Izvleček
Dopolnili smo vednost o fitocenološki sestavi bukovih gozdov v dolini Raše, na severovzhodnem robu Krasa, natančneje med planoto Vrhe, Senožeškim podoljem in Krasom. Uvrščamo jih v dve asociaciji,Seslerio autumnalis-Fagetumin Hacquetio-Fagetum. Za slednjo smo ugotovili novo subasociacijo (-lamietosum orvalae) in novo geografsko subvarianto (subvar. geogr. Helleborus istriacus). Kljub majhnim površinam so ti bukovi gozdovi v zdajšnji prevladujoči hrastovi in črnogabrovi gozdni vegetaciji Krasa pomembni, saj sodijo v Natura 2000 habitatni tip Ilirski bukovi gozdovi (Aremonio-Fagion). Ogrožajo jih podnebne spremembe in premočne sečnje.
Ključne besede: fitocenologija, sinsistematika,Aremonio-Fagion, Hacquetio-Fagetum, Raša, Kras, Slovenija
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