1. Urban hedges facilitate spontaneous woody plantsEva Horvat, Mirjana Šipek, Nina Šajna, 2024, izvirni znanstveni članek Opis: Most trees and other woody plants growing within urban areas are deliberately cultivated native or non-native plants. Opportunities for spontaneous establishment and spread of woody species are scarce in an urban environment, especially if the establishment begins from seeds. We hypothesized that urban hedges might offer safe sites for the spontaneous establishment of woody plants, which reach the hedges through propagule dispersal. We recorded the species composition of urban hedges in Maribor (NE Slovenia) in a gradient from the city centre outwards and evaluated the species' invasive potential and ecological requirements, along with hedge characteristics. Results show that hedges facilitated the survival and growth of 69 woody plants from 28 families. Among these, 62% were non-native and 10% were locally invasive. Most of recorded non-native woody plants were ornamentals. Moreover, for native species, we show that the stressful, warmer urban environment mostly facilitates the establishment of species in the genera Hedera and Acer. Comparison of non-native and native plants showed the former are more drought and heat tolerant than the latter. We further show that with distance from the city centre, the number of bird-dispersed species increases, in contrast to the wind-dispersed species. Additionally, our results suggest evergreen hedges may be less permeable to wind-dispersed propagules than deciduous hedges. Next, we stress the importance of paved surfaces and urbanization, selecting for the thermophile, drought tolerant, wind-dispersed woody plants that find refuge in urban hedges. Our results suggest urban hedges can facilitate the establishment of a wide range of woody plant species.
Ključne besede: biodiversity, green infrastructure, ornamental plants, species richness, urban ecosystem, vegetation
Objavljeno v DKUM: 03.12.2024; Ogledov: 0; Prenosov: 27
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2. Lowland forest fragment characteristics and anthropogenic disturbances determine alien plant species richness and compositionMirjana Šipek, Nina Šajna, 2024, izvirni znanstveni članek Opis: Loss of habitat and biological invasion are the main threats to biodiversity. In intensive agricultural or urban landscapes, forest fragments, even if they are small and isolated represent biodiversity refugia. Environmental variables such as landscape structure, abiotic conditions and anthropogenic disturbance affect the biodiversity of the fragments. In this study, we explored plant species richness in 48 forest fragments embedded in predominantly agricultural landscapes on the alluvial plains of the Mura and Drava rivers in NE Slovenia. We determined several forest fragment characteristics such as perimeter, area, shape complexity, length and proportion of edge shared with adjacent land-cover types and anthropogenic disturbance indicated by the presence of footpaths and waste disposed in fragments. The abiotic condition of these fragments was assessed by Ellenberg indicator values. We built generalized linear models and ordination analyses to assess the importance of environmental variables for the richness and composition of alien plant species and other ecologically meaningful plant groups. Shape complexity had a consistent positive effect on the richness of native and alien plants species. Major drivers of alien plant composition in forest fragments included adjacent land-cover and urbanization level. An increasing proportion of arable land along the forest fragment perimeter negatively affected the richness of alien plants, while the effect of urban areas was positive. Our results confirmed that forest fragments in the rural-urban matrix represent biodiversity refugia and support native plant species; however, they are not resistant to invasions; instead invasion depends on the land-cover type in the surroundings of a given forest fragment.
Ključne besede: agricultural land, urban area, settlements, fragment size, fragment shape complexity, ornamental plants
Objavljeno v DKUM: 29.11.2024; Ogledov: 0; Prenosov: 20
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3. Editorial : Phytochemicals in ornamental plants: Synthesis, nutraceutical prospects and applied focus—Women in plant science seriesValentina Schmitzer, Wee Sim Choo, Andreja Urbanek Krajnc, 2022, predgovor, uvodnik, spremna beseda Ključne besede: ornamental plants, Brassica oleracea, Skimmia anquetilia, Clitoria ternatea, phytochemicals, editorial
Objavljeno v DKUM: 04.07.2024; Ogledov: 85; Prenosov: 15
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4. Morphological descriptors of Christmas rose (Helleborus niger L.)Andrej Šušek, 2008, izvirni znanstveni članek Opis: The Christmas rose (Helleborus niger L.) is becoming an important ornamental plant. in the future, a systematic genetic improvement will probably become inevitable and therefore the characterisation of the naturally grown populations and the accessions within germplasm collections will be extremely important for the breeders. We followed the idea that characterisation of genetic materials has to involve highly heritable morphological traits which are important for the selection and are easy for the determination. the study is based on 5-year long observations of the Slovenian and Croatian naturally grown populations and gerplasm collections. The papers describes 72 morphological traits that appear to be at last partly genetically controlled and can be used as descritors of Christmas rose genotypes.
Ključne besede: Christmas rose, Helleborus niger, ornamental plants, morphological descriptors
Objavljeno v DKUM: 10.07.2015; Ogledov: 1857; Prenosov: 37
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