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Makrofiti v slovenskih vodotokih in njihov varstveni status
Macrophytes of Slovenian watercourses and their conservation 
status
u r Š k a k u h a r , Ma T e j a g e r M , a l e n k a ga B e r Š č i k
Department of Biology, Biotechnical faculty, University of Ljubljana, Večna pot 111, 
1000 Ljubljana, Slovenia; urska.kuhar@bf.uni-lj.si
The macrophyte survey was performed on 750 km of Slovenian watercourses using the 
methodology of Kohler & Janauer (1995). Different documents on threatened macrophyte 
species, i.e. Slovenian Red list of Pteridophyta and Spermatophyta, Slovenian Decree 
on protected wild plant species, Convention on the conservation of European wildlife 
and natural habitats (Bern Convention), EC Habitat Directive, and The IUCN Red list of 
threatened species were examined to compare the level of endangerment at national and 
international levels. 105 macrophyte species were recorded during the investigation. 39 are 
listed on the Red list of Pteridophyta & Spermatophyta. Three out of them are classified 
as endangered (Groenlandia densa, Oenanthe fistulosa and Potamogeton trichoides) and 
others are classified as vulnerable. Eight species, including two endangered species, were 
found only in watercourses with a karst hydrology, characterised by alternation of floods and 
dry periods. Butomus umbelatus and all species of Iris are included in Decree on protected 
wild plant species and Trapa natans in Bern Convention, while other documents does not 
comprise any of the species found in Slovenian watercourses. Data analysis revealed that 
some species found in Red list, i.e. Myriophyllum spicatum, Potamogeton nodosus and 
P. perfoliatus as well as Ranunculus trichophyllus are relatively frequent and abundant, 
therefore they might be omitted from the Red list.
u r Š k a k u h a r e t a l .: Makrofiti v slovenskih vodotokih…