Localities and sites of the Southeastern-Alpine endemic species Spiraea decumbens koch in Breginjski kot (Northwestern Slovenia)

Pavlin, Marko (author), Brus, Robert (author), Dakskobler, Igor (author)

The eastern distribution limit of Spiraea decumbens s. str. is in Breginjski Kot (northwestern Slovenia), where we recorded 49 localities of this eastern-Alpine endemic plant species. We determined two new localities in a new quadrant (9746/4) on riparian rocks of the Nadiža River under Mt. Mija at Kozja Peč, which is currently the southeasternmost point of its entire distribution area. We conducted a phytosociological survey of 26 localities. This endemic occurs in dolomite rock crevices in stands classified within the association Spiraeo-Potentilletum caulescentis. On dolomite screes and torrential fens it is found to dominate on small areas in the successional stages, classified into the provisional association Aquilegio einseleanea-Spiraeetum decumbentis (alliance Petasition paradoxi) and into the new association Spiraeo decumbentis-Seslerietum calcariae (alliance Caricion austroalpinae). These stages are gradually becoming overgrown with thermophilous deciduous trees, and in one of the relevés we found the studied species in an open hop hornbeam stand classified into the association Fraxino orni-Ostryetum. Its populations are vital and unthreatened, except in the two new localities under Mt. Mija, which call for special protection due to their small size and a possibility of being backfilled with gravel.

• Language: English
• Keywords: phytogeography, phytosociology, population ecology, Spiraea decumbens subsp. decumbens, Breginjski Kot, Slovenia
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Year: 2015
• Number of pages: Str. 1-14
• Numbering: 107
• PID: 20.500.12556/RUL-81612
• UDC: 630*18:630*17(497.4 Breginjski kot)(045)=111
• ISSN on article: 2335-3112
• DOI: 10.20315/ASetL.107.1
• COBISS.SI-ID: 4356006
• Publication date in RUL: 29.04.2016

Record is a part of a journal

• Title: Acta Silvae et Ligni
• Publisher: Gozdarski inštitut Slovenije, založba Silva Slovenica, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
• ISSN: 2335-3112
• COBISS.SI-ID: 266761216

Secondary language

• Language: Slovenian
• Title: Nahajališča in rastišča jugovzhodnoalpskega endemita Spiraea decumbens koch v Breginjskem kotu (severozahodna Slovenija)

Abstract

V Breginjskem kotu (severozahodna Slovenija) smo popisali 49 nahajališč vzhodnoalpskega endemita polegle medvejke (Spiraea decumbens s. str.), ki ima tu vzhodno mejo svojega areala. Ugotovili smo dve novi nahajališči v novem kvadrantu (9746/4), in sicer na obrečnih skalah Nadiže pod goro Mijo pri Kozji peči, kar je za zdaj skrajna jugovzhodna točka celotnega areala. 26 nahajališč smo fitocenološko popisali. Sestoje, kjer ta endemit uspeva v dolomitnih skalnih razpokah, uvrščamo v asociacijo Spiraeo-Potentilletum caulescentis. Na dolomitnih meliščih in hudourniških vršajih je na manjših površinah prevladujoč v sukcesijskih stadijih, ki jih uvrščamo v provizorno asociacijo Aquilegio einseleanea-Spiraeetum decumbentis (zveza Petasition paradoxi) in v novo asociacijo Spiraeo decumbentis-Seslerietum calcariae (zveza Caricion austroalpinae). Ti stadiji se postopno zaraščajo s toploljubnimi listavci in na enem popisu smo preučeno vrsto našli v vrzelastem sestoju črnega gabra, ki ga uvrščamo v asociacijo Fraxino orni-Ostryetum. Njene populacije so vitalne in neogrožene, razen na obeh novih nahajališčih pod Mijo, ki bi zaradi majhnosti in mogočega zasutja s prodom morali biti deležni posebne varstvene pozornosti.

• Keywords: fitogeografija, fitocenologija, populacisjka ekologija, Breginjski kot, Slovenija, Spiraea decumbens