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Research Interests: Mathematics and Biology
A naturalized population of Asiatic fern Cyrtomium fortunei J. Sm. was found in the surroundings of Nova Gorica. It is the first record of the species in the country, although the locality is an expected prolongation of the secondary... more
A naturalized population of Asiatic fern Cyrtomium fortunei J. Sm. was found in the surroundings of Nova Gorica. It is the first record of the species in the country, although the locality is an expected prolongation of the secondary distribution range with the species’ concentration in southern foothills of the Carnic Prealps (N Italy). The locality is characterized by mild temperate submediterranean climate and slightly degraded forest vegetation of the alliance Carpinion orientalis, where the fern occurs in the herb layer. Local occurrence of the fern represents the easternmost point of its secondary distribution range in Northeastern Italy, although this could possibly be connected with the immediate vicinity of the graveyards at the top of the slope.
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Cities represent enviroment for most of Europe's human population. Spatial pattern of cities' environmental as well as socioeconomic features affect plant biodiversity. We analysed a floristic mapping dataset of the city of... more
Cities represent enviroment for most of Europe's human population. Spatial pattern of cities' environmental as well as socioeconomic features affect plant biodiversity. We analysed a floristic mapping dataset of the city of Ljubljana (Slovenia) and asked what affects the spatial differences in the presence of different categories of species: species according to residence time and endangered and thermophilic species. To explain the proportions of these species groups in grid cells, using Generalized Additive Models, we tested the effects of three categories of predictors: i) urban structure, represented by the distance from the city centre, population density, soil sealing, and quality of residential environment index, ii) habitat predictors, represented by habitat diversity and geologic diversity, and iii) environmental conditions, represented by urban heat island (UHI). Species richness decreases with the distance from the city centre and is highest in the cells with intermediate habitat diversity. Number of species is highest within city parts of highest quality of residential environment index and lowest in parts with UHI effect. Proportion of native species is positively related to habitat and geologic diversity. The proportion of archaeophytes is higher where habitats are more diverse and increases with the distance from the city centre. Grid cells with highest proportion of neophytes are located in the most built-up areas and in the city centre, which is positively associated with soil sealing, but negatively with UHI. Thermophilic species are positively associated with soil sealing. Endangered species have uniform distribution pattern and their proportion is negatively associated with distance from the city centre and soil sealing. A grid cell with the highest proportion of endangered species includes two protected areas with wetland habitats. Calculated ecological indicator values show correlation with soil sealing and habitat diversity. Some of the results are in line with well-established patterns from other cities, while others reflect certain specific features of Ljubljana, e.g. forested hills close to the city centre. The identified hotspots of city's plant species richness can serve in the argumentation of future urbanistic planning.
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... a Nature Conservation and Plant Ecology Group, Wageningen University, Bornsesteeg 69, 6708 PD ... b Alterra, Centre for Ecosystem Studies, Droevendaalsesteeg 3, PO Box 47, 6700 AA ... The colonization of remaining areas of... more
... a Nature Conservation and Plant Ecology Group, Wageningen University, Bornsesteeg 69, 6708 PD ... b Alterra, Centre for Ecosystem Studies, Droevendaalsesteeg 3, PO Box 47, 6700 AA ... The colonization of remaining areas of semi-natural vegetation by Solidago may then pose ...
Research Interests: Forestry, Biology, Ecology, Invasive Species, Biodiversity, and 15 moreBiological Sciences, Environmental Sciences, Negative Affect, Biological Conservation, Invasive Alien Species, Plant, Species Diversity, Habitats, Invasive plants, Invasive Plant, Positive Affect, Invasive plant species, Plant species, Host Plant, and Plant species richness
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The article presents the inventory of vascular plant flora in the quadrant 10248/2 that lies in the submediterranean part of Slovenia in the Karst area. Field work was conducted in years 2007-09 in the frame of graduation thesis (Flora in... more
The article presents the inventory of vascular plant flora in the quadrant 10248/2 that lies in the submediterranean part of Slovenia in the Karst area. Field work was conducted in years 2007-09 in the frame of graduation thesis (Flora in the vicinity of Dutovlje (0248/2)).
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Research Interests: Biology and Macrophyte
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The article discusses the damage caused by herbarium pests in Herbarium LJU. The aim of the study was to determine the damage in the herbarium, to find out, which herbarium-pests are present, and to investigate their food-preference by... more
The article discusses the damage caused by herbarium pests in Herbarium LJU. The aim of the study was to determine the damage in the herbarium, to find out, which herbarium-pests are present, and to investigate their food-preference by means of checking the extent of damage on a selection of plant families Alliaceae, Apiaceae, Araceae, Asteraceae, Brassicaceae, Chenopodiaceae, Cichoriaceae, Faba- ceae, Lamiaceae, Poaceae, Polypodiaceae, Ranunculaceae, Rosaceae and Scrophulariaceae. Since the Asteraceae and Cichoriaceae are known to be among the most attractive families for herbarium-pests, we examined them in detail. In the study about 7500 herbarium sheets were examined, which represents 5% of all the sheets inHerbarium LJU. In addition to the most frequent pest tobacco beetle (Lasioderma serricorne), we also found beetles Stegobium paniceum and Attagenuspiceus, booklice (Psocoptera), moulds and Pharaoh’s ants (cf. Monomorium pharaonis). Pest-damage was observed in 18 % of the exami...
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Research Interests: Geography and Floristics
(i) Floristic data of vascular high-mountain plants from the Alps and the Carpathians, with occurrences of each species with a regular grid system (ii) Species-specific AFLP data (1/0 matrices) separately for samples from Alps and... more
(i) Floristic data of vascular high-mountain plants from the Alps and the Carpathians, with occurrences of each species with a regular grid system (ii) Species-specific AFLP data (1/0 matrices) separately for samples from Alps and Carpathians, collected along the same grid system as the floristic dat
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Cutandia maritima is a circum-Mediterranean species that inhabits sandy dunesalong the coast line. It is fairly frequent on the western Adriatic coast but fairlyrare and possibly even non-native in the east. In Croatia, it was discovered... more
Cutandia maritima is a circum-Mediterranean species that inhabits sandy dunesalong the coast line. It is fairly frequent on the western Adriatic coast but fairlyrare and possibly even non-native in the east. In Croatia, it was discovered in1990 in Crnika Bay on the island of Rab, which was considered until 2005 to bethe only site on the eastern Adriatic coast from the Gulf of Trieste in the northto Corfu in the south. In 2009, the species was briefly reported for Velika plaža(Long Beach) in Ulcinj (Montenegro) but without details about the habitattype and synecology. Te aim of this paper is thus to provide a deeper insightinto the ecology and synecology of C. maritima in the eastern Adriatic part ofthe distribution area. On Velika plaža in Ulcinj, the species was found along thewhole sea-inland gradient of sand dunes, in various types of vegetation: [1210]– annual vegetation of drift lines, [2110] – embryonic shifting dunes, [2120]– shifting dunes with Ammophila arenaria (white dunes...
Research Interests: Vegetation and Sand dunes
The vegetation of thermophilic trampled habitats was sampled in the Bay of Kvarner according to the standard procedures of the Braun- Blanquet method. The following associations were determined: Polycarpo-Amaranthetum deflexi Pignatti... more
The vegetation of thermophilic trampled habitats was sampled in the Bay of Kvarner according to the standard procedures of the Braun- Blanquet method. The following associations were determined: Polycarpo-Amaranthetum deflexi Pignatti 1953, Euphorbio-Oxalidetum corniculatae Lorenzoni 1964, Euphorbietum maculatae Poldini 1989, Eleusinetum indicae Pignatti 1953. Among them a new association was described: Catapodio loliacei-Herniarietum rotundifoliae ass. nova. The Euphorbia prostrata community, Trifolium repens community, and the Cynodon dactylon community were not assigned to the association. The ordination diagram (Princoor program) shows the main differences among the communities. On the first axis, there is a gradient from the most thermophilic Cynodontetum dactylon comm. and Catapodio-Herniarietum to the more mesophilous and less trampled Polycarpo-Amaranthetum and Cynodon dactylon community to all other communities with more Eragrostietalia elements.The vegetation of thermophil...
Rumex thyrsiflorus has been recorded for the first time in the territory of Croatia. Several localities have been found around Varaždin (N Croatia). Its occurrence in this region can be explained by the expansion of its area of... more
Rumex thyrsiflorus has been recorded for the first time in the territory of Croatia. Several localities have been found around Varaždin (N Croatia). Its occurrence in this region can be explained by the expansion of its area of distribution from the central Europe towards the south. Superficially it is quite similar to R. acetosa from which it can be easily distinguished by its longer tap-root, narrower and longer leaf blades and denser inflorescence.Rumex thyrsiflorus has been recorded for the first time in the territory of Croatia. Several localities have been found around Varaždin (N Croatia). Its occurrence in this region can be explained by the expansion of its area of distribution from the central Europe towards the south. Superficially it is quite similar to R. acetosa from which it can be easily distinguished by its longer tap-root, narrower and longer leaf blades and denser inflorescence
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Since the end of the 19 t h century, six species from the Bromus erectus group have been recorded for Slovenia: B. erectus HUDSON s.str., B. transylvanicus STEUDEL, B. condensatus HACKEL, B. stenophyllus LINK, B. pannonicus KUMMER &... more
Since the end of the 19 t h century, six species from the Bromus erectus group have been recorded for Slovenia: B. erectus HUDSON s.str., B. transylvanicus STEUDEL, B. condensatus HACKEL, B. stenophyllus LINK, B. pannonicus KUMMER & SENDTNER and B. moellendorfianus (ASCHERSON & GRAEBNER) HAYEK. Since the delimitation of the taxa is still unclear, the purpose of the research was to investigate the discriminative power of distinguishing characters, used in various floristic works and also some new potentially useful distinguishing characters, subsequently to confirm whether these taxa really occur in Slovenia and finally to state their distribution. Besides the classical 'intuitive' approach to this problem, some methods of numerical taxonomy were used. The study was based on material from the herbarium LJU and second author's private collection. In the analysis 198 individuals were taken into account and 48 characters were investigated. The data were analyzed using hierar...
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Konec leta 2015 je Javna agencija za raziskovalno dejavnost Republike Slovenije odobrila projekt Zgodovina doktorskih disertacij slovenskih kandidatov v avstro-ogrski monarhiji (1872–1918), ki je trajal tri leta. Dobrsen del raziskav je... more
Konec leta 2015 je Javna agencija za raziskovalno dejavnost Republike Slovenije odobrila projekt Zgodovina doktorskih disertacij slovenskih kandidatov v avstro-ogrski monarhiji (1872–1918), ki je trajal tri leta. Dobrsen del raziskav je potekal v dunajskem univerzitetnem arhivu (Archiv der Universitat Wien) in izsledke je mogoce prebrati v posameznih poglavjih te knjige.
Tragopogon dubius is a species native to SW Slovenia and with several dubious records in central and eastern parts of the country. Its locus classicus is in SW Slovenia at Senožeče, but there is a slight doubt about the type description... more
Tragopogon dubius is a species native to SW Slovenia and with several dubious records in central and eastern parts of the country. Its locus classicus is in SW Slovenia at Senožeče, but there is a slight doubt about the type description as no herbarium material has been preserved. All records (and herbarium vouchers in University of Ljubljana\u27s (LJU) collection) of the species from continental Slovenia have been critically assessed, but none of them has proved to be reliable. Three new recently discovered records linked to the railways in central and E Slovenia are presented and discussed.Tragopogon dubius je v submediteranskem delu Slovenije avtohtona vrsta s peščico nezanesljivih navedb o njenem pojavljanju v osrednji in vzhodni Sloveniji. Njeno klasično nahajališče je pri Senožečah, a še vedno obstaja rahel dvom o ustreznosti imena, saj ni ohranjen Scopolijev herbarijski material. Vse starejše navedbe, skupaj s herbarijskim materialom v herbarijski zbirki Ljubljanske univerze ...
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The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biodiversity, i.e. ecosystems, species and genes. Genetic diversity represents evolutionary potential and is important for ecosystem functioning.... more
The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biodiversity, i.e. ecosystems, species and genes. Genetic diversity represents evolutionary potential and is important for ecosystem functioning. Unfortunately, genetic diversity in natural populations is hardly considered in conservation strategies because it is difficult to measure and has been hypothesized to co-vary with species richness. This means that species richness is taken as a surrogate of genetic diversity in conservation planning, though their relationship has not been properly evaluated. We tested whether the genetic and species levels of biodiversity co-vary, using a large-scale and multi-species approach. We chose the high-mountain flora of the Alps and the Carpathians as study systems and demonstrate that species richness and genetic diversity are not correlated. Species richness thus cannot act as a surrogate for genetic diversity. Our results have important consequences for implementing the CBD when designing conservation strategies
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Tragopogon dubius is a species native to SW Slovenia and with several dubious records in central and eastern parts of the country. Its locus classicus is in SW Slovenia at Senožece, but there is a slight doubt about the type description... more
Tragopogon dubius is a species native to SW Slovenia and with several dubious records in central and eastern parts of the country. Its locus classicus is in SW Slovenia at Senožece, but there is a slight doubt about the type description as no herbarium material has been preserved. All records (and herbarium vouchers in University of Ljubljana's (LJU) collection) of the species from continental Slovenia have been critically assessed, but none of them has proved to be reliable. Three new recently discovered records linked to the railways in central and E Slovenia are presented and discussed.
Research Interests: Biology and Asteraceae
nimblewill, is a widespread North American perennial grass species, slowly spreading in European countries, where it has been recorded in Spain, Switzerland, Italy, and Slovenia. In addition, a well naturalized population was discovered... more
nimblewill, is a widespread North American perennial grass species, slowly spreading in European countries, where it has been recorded in Spain, Switzerland, Italy, and Slovenia. In addition, a well naturalized population was discovered in Opatija (Northwestern Croatia, Croatian Littoral) in 2011 as described herein. It has been recognized as a persistent weed in some North American states, and in the last few decades its secondary European distribution range has been slowly increasing. Thus most probably it will also spread in Croatia and become classified as invasive.