Sukcesijske stopnje v razvoju gozdne vegetacije v krnicah dveh alpskih dolin v Julijskih Alpah (severozahodna Slovenija)

We investigated different types of vegetation in cirques of two valleys in the Julian Alps, Zadnjica and Kot, which develop on slope screes and are heavily influenced by avalanches that occur here every year. Our phytosociological analysis identified the following shrub-forest developmental stages: Saliceteum eleagno-purpureae hieracietosum porrifolii var. Achnatherum calamagrostis, Homogyno sylvestris-Salicetum glabrae, Polysticho lonchitis-Rhamnetum fallacis, Rhododendro hirsuti-Laburnetum alpini, Rhodothamno-Laricetum deciduae anemonetosum trifoliaeand Rhododendro hirsuti-Fagetum sylvaticaevar. Sorbus chamaemespilus.On unconsolidated fluvio-glacial deposits in the Kot Valley we determined the following successional stages: Salicetum eleagno-purpurae hieracietosum porrifolii var. Pinus mugo, Amelanchiero ovalis-Pinetum mugo laricetosumand Rhododendro hirsuti-Fagetum sylvaticae petasitetosum paradoxi.