Phytosociological analysis of montane beech forests on steep shady slopes on mixed geological bedrock in western Slovenia / Fitocenološka analiza montanskih bukovih gozdov na strmih osojnih pobočjih na mešani geološki podlagi v zahodni Sloveniji

Authors

  • Igor Dakskobler Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Regional unit Tolmin, and Biotechnical Faculty of the University in Ljubljana, Department of Forestry and Renewable Forest Resources

Abstract

We have conducted phytosociological research into beech forests in western Slovenia that occur on steep shady slopes on dolomite or limestone with a frequent admixture of silicate. We classified the stands on dolomite and partly on platy limestone into the association Arunco-Fagetum and described many of its new subassociations (-caricetosum ferruginei, -vincetosum minoris, -tilietosum). In terms of phytogeography they belong to the geographical variant var. geogr. Anemone trifolia and to two new geographical subvariants: subvar. geogr. Omphalodes verna and subvar. geogr. Aconitum angustifolium. Beech stands on very steep shady slopes in the montane belt of the southern Julian Alps (from 500 m do 1400 m a.s.l.), which occur on sites characterised by an admixture of chert, marlstone and (or) claystone on calcareous bedrock and shallow, stony and slightly acid soil are because of significant floristic differences classified into a new, intrazonal association Saxifrago cuneifolii-Fagetum (alliance Aremonio-Fagion), dependent on land configuration and edaphic conditions. We described the following subassociations: -typicum, -fraxinetosum orni, -rhododendretosum hirsuti,-aruncetosum and -gymnocarpietosum dryopteridis. In terms of floristic composition the new association most resembles some forms of the associations Homogyno sylvestris-Fagetum and Rhododendro hisuti-Fagetum. 

Key words: phytosociology, synsystematics, phytogeography, Arunco-Fagetum, Saxifrago cuneifolii-Fagetum, Aremonio-Fagion, Julian Alps, Trnovski Gozd plateau, Slovenia 

 

V zahodni Sloveniji smo fitocenološko preučili bukove gozdove, ki uspevajo na strmih osojnih pobočjih na dolomitu ali apnencu s pogosto silikatno primesjo. Sestoje na dolomitu in deloma ploščastem apnencu smo uvrstili v asociacijo Arunco-Fagetum in opisali več njenih novih subasociacij (-caricetosum ferruginei, -vincetosum minoris, -tilietosum). V fitogeografskem smislu pripadajo geografski varianti var. geogr. Anemone trifolia in dvema novima geografskima subvariantama: subvar. geogr. Omphalodes verna in subvar. geogr. Aconitum angustifolium. V to asociacijo zaradi prevelikih florističnih razlik nismo mogli uvrstiti sestojev na zelo strmih osojnih pobočjih v montanskem pasu južnih Julijskih Alp (od 500 m do 1400 m nm. v.). Zanje je značilna primes roženca, laporovca in (ali) glinavca v karbonatni geološki podlagi in plitva, kamnita in nekoliko zakisana tla. Zato jih uvrščamo v novo edafsko in reliefno pogojeno intraconalno asociacijo Saxifrago cuneifolii-Fagetum iz zveze Aremonio-Fagion.Opisali smo naslednje njene subasociacije: -typicum, -fraxinetosum orni, -rhododendretosum hirsuti,-aruncetosum in -gymnocarpietosum dryopteridis. Po floristični sestavi so novi asociaciji najbolj podobne nekatere oblike asociacij Homogyno sylvestris-Fagetum in Rhododendro hisuti-Fagetum. 

Ključne besede: fitocenologija, sinsitematika, fitogeografija, Arunco-Fagetum, Saxifrago cuneifolii-Fagetum, Aremonio-Fagion, Julijske Alpe, Trnovski gozd, Slovenija

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Published

2016-02-05

Issue

Vol. 56 No. 1 (2015)

Section

Articles

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