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Grassland ecology in changing climate and land use
Zoltán Tuba, Mitja Kaligarič, 2008, original scientific article

Abstract: This brief overview decribes some structural and functional (including carbon cycling) aspects of grassland ecosystems, in particular with regard to the effects of global climate change and changes in land use. Afterward the papers briefly introduce the papers devoted to the above mentioned topics, which were selected for this special volume. As we can see, authors studied different kinds of management (including abandonment) and different parameters of climate change (CO2 , temperature, rainfall, etc.). They consider predominately vegetation parameters, including the various plant traits, carbon cycling, soil respiration and different ecophysiological traits in simulated climate change. Dealing with different impacts of climate and/or land-use changes on multi-species systems, that grassland communities certainly are, is exceeding merely experimental synthesized-community or single-species approach on one side and classical vegetation studies on the other. The complex responses of natural communities, including those under FACE systems, are not easy to interpret and understand. The importance of non-linear dynamics during climate changes is emphasized by Bartha et al. (2008). In these selected papers, grasslands appear to be a very dynamic and plastic ecosystem. Grasslands are highlighted from a new, much more topical point of view. Linking ecophysiology and vegetation science, which is characteristic for our selection of papers, is a promising tool to deal with problems on the ecosystem level in general, not only addressing the global climate change and land-use issues.
Keywords: botany, vegetation, grasslands, climate changes, land use
Published: 07.06.2012; Views: 997; Downloads: 51
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Preliminary estimation of bryophyte biomass and carbon pool from three contrasting different vegetation types
Mahesh Kumar Singh, Anita Juhász, Zsolt Csintalan, Mitja Kaligarič, Michal V. Marek, Otmar Urban, Zoltán Tuba, 2005, published scientific conference contribution

Abstract: Bryophytes are the primary form of carbon storage in many ecosystems. There is growing consensus within the scientific community that increases in atmospheric carbon dioxide (CO2) enhancing the earth's natural greenhouse effect. Because of the potential effects of these gases on the global enery budget and future elimate, there is an urgent need to quantify terrestrial sources and sinks of carbon. There is more carbon stored in some bryophytes than in any other genus of vascular or non-vascular plants (Clymo & Hayward, 1982). Predicting how the vast stores of carbon in moss-dominated ecosystems will be affected by anthropogenic disturbance is critical for models of global climate change (Post et al., 1982). Bryophytes are a prominent feature of many forest and grassland types, where they can make an important contribution to carbon balance (Delucia, et al., 2003). Tropical montane rain forest, because of their complexity and variety of microhabitats, usually harbors a rich diversity of bryophytes. Even though they are often small and inconspicuous, especially in the lowland forest, they may play a significant role in the forest ecosystem (Frahm, 1994). Similarly, bryophytes in the temperate forest and grasslands are thought to be an important carbon sink (O'Neill, 2000). The objective of this research was to estimate components of the bryophyte biomass and approximate amount of carbon stored in it.
Keywords: vegetation, habitats, geoelements, carbon, carbon storage, bryophyte, bryophyte biomass
Published: 07.06.2012; Views: 1064; Downloads: 71
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Functional comparision of the sub-Mediterranean illyrian meadows from two distinctive geological substrates
Nataša Pipenbaher, Mitja Kaligarič, Sonja Škornik, 2008, original scientific article

Abstract: In this paper, floristic and functional approaches to the classification of different types of sub-Mediterranean illyrian grasslands of the association Danthonio-Scorzoneretum villose lalliance Scorzonerion villosae, order Scorzoneretalia villosae, class Festuco-Brometea) are compared. The data set includes table with 30 relevés from SW Slovenia, sampled in two contrasting geological bedrocks - flysch and limestone - and matrix with 18 treits determined for 119 plant species. We also tested an impact of different geological bedrock on the relative proportions of C-S-R plant strategies in the relevés. With DCA ordinetion, relevés from limestone and flysch were clearly divided in two groups. First DCA axis suggested a gradient of soil humidity and pH. On the basis of selected traits, 5 Plant Functional Types were clustered and interpreted with Twinspan analysis. PCA ordination of relevés on the basis of plant functional traits revealed that samples from limestone could be separated from those taken on flysch substrate also with functional approach. Reievés from limestone tend to have bigger shares of species, which propagate by seed and vegetatively, and competitors and herbs. Nevertheless, it could be concluded that there are no major functional differences between meadows from both geological substrates. The positions of all relevés in standard C-S-R temary diagram showed that that the relative proportions of C-S-R functional types were not influenced by different geological bedrock.
Keywords: botanika, vegetacija, travišča, suhi travniki, rastlinski funkcionalni tipi, severni Jadran, C-S-R strategije rastlin, botany, biogeography, vegetation, grasslands, dry grasslands, classifcation, North Adriatic, C-S-R plant strategy
Published: 10.07.2015; Views: 616; Downloads: 11
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Vegetation of tall rush saltmarshes (Juncetea maritimae) and saltmarsh scrubs (Arthrocnemetea fruticosae) on the Slovenian seacoast
Mitja Kaligarič, Sonja Škornik, 2007, original scientific article

Abstract: Halophyte vegetation of Slovenian sedimentary seacoast was studied according to Braun-Blanquet method. 140 collected relevés were analysed by cluster analysis and five main clusters were separated. Relevés from the first, fourth and fifth clusters were further elaborated in this study. The Juncus maritimus-dominated tall rush saltmarshes of the class Juncetea maritimi were classified within two associations: Limonio-Puccinellietum represented hygrophilous stands, exposed to tide, while the association Juncetum maritimi-acuti was represented with more closed stands with higher species richness, thriving on rather drier sites. With in the saltmarsh scrubs of the class Arthrocnemetea fruticosi, 3 associations, following the declining moisture/salinity gradient were recognized: Puccinellio-Arthrocnemetum, Puccinellio-Halimionetum and Limonio-Artemisietum.
Keywords: botanika, vegetacija, fitosociologija, halofitna vegetacija, klasifikacija, severni Jadran, botany, biogeography, vegetation, phytosociology, halophyte vegetation, classifcation, North Adriatic
Published: 10.07.2015; Views: 639; Downloads: 25
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Is variety of species-rich semi-natural Mesobromion grasslands detectable with functional approach?
Mitja Kaligarič, Nina Šajna, Sonja Škornik, 2005, original scientific article

Abstract: The aim of the study was to compare how the relevés of species-rich dry grasslands (classis Festuco-Brometea) in Central and Eastern Slovenia differ among each other on the basis of floristic composition and of 11 Plant Functional Traits (PFTs). On the basis of floristic structure and cover values, the relevés were classified in three well separated clusters. In the PCA ordination, the first axes suggested a gradient of soil pH, while the second, floristically based gradient, was interpreted as soil humidity. On the basis of selected traits, 3 PFTs were clustered, but not clearly interpreted. Despite differences in environmental parameters across Slovenia (climate, geographical position, altitude, soil conditions) and variety of land use disturbances - drivers of floristic variety, no discernible difference in vegetation structure in terms of selected plant traits were perceived by PCA ordination. It could be concluded that secondary dry grasslands share rather uniform functional types with not clearly detectable structural differences among them.
Keywords: botanika, vegetacija, biogeografija, travišča, suha travišča, rastlinski funkcionalni znaki, rastlinski funkcionalni tipi, Slovenija, funkcionalni pristopi, botany, biogeography, vegetation, grasslands, dry grasslands, plant functional traits, plant functional types, Slovenia, functional approaches
Published: 10.07.2015; Views: 532; Downloads: 17
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Vegetation of the Stjuža coastal lagoon in Strunjan landscape park (Slovenia)
Nina Šajna, Mitja Kaligarič, 2005, original scientific article

Abstract: A draft history of the artificial Stjuža coastal lagoon was reconstructed on the basis of old maps (1804 and 1873); and compared with the present-day situation using GIS. The current data were simplified to obtain comparable caregories (landscape units) with old maps. The following major landscape units were distinguished: lagoon, salt marshes, mainland, brackish rivers and estuaries, ditches and canals, salt-pans, embankment, villages and roads. On current map, a total of 47 habitat types according to PHYSIS typology occurring in 206 polygons, which cover an area of 41.6 ha, were identified and described. Habitats with greater nature-conservancy value cover 26.7 ha of the total research area and constitute 40% of the polygons described. 55.6% of these belong to halophilous scrubs - Sarcocornetea fruticosi (= Arthrocnemetea fruticosi) - and 25.9% to annual salt pioneer sward communities, dominated by Salicornia europaea. Mediterranean salt swamps (Juncion maritimi) are present to a small extent only. It could be concluded that the artificial Stjuža lagoon, constructed for fish farming purposes, developed in habitat diverse coastal wetland area after partial abandonment.
Keywords: botanika, vegetacija, biogeografija, obalna laguna, habitatni tipi, kartiranje, obmorska mokrišča, Slovenija, botany, biogeography, vegetation, coastal lagoon, habitat types, Slovenia, mapping, wetlands
Published: 10.07.2015; Views: 691; Downloads: 18
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Germination characteristics of Salicornia patula Duval-Jouve, S. emerici Duval-Jouve, and S. veneta Pign. et Lausi and their occurrence in Croatia
Nina Šajna, Marjana Regvar, Simona Kaligarič, Željko Škvorc, Mitja Kaligarič, 2013, original scientific article

Abstract: According to recent molecular analyses of Salicornia, we revised the annual glassworts from the Croatian coast, classified until now only as Salicornia europaea. Two species, a diploid Salicornia patula and a tetraploid S. emerici were recognized. They can be easily distinguished by floral characters, but not only by their habitus, which varies extremely according to environmental factors. Both species differ also in seed morphology. Salicornia patula has dimorphic seeds, with larger central seeds reaching high germination rates. Germination patterns helped to explain the habitat preferences. The species rarely co-occur, however. The rare S. patula occupies drier habitats, on coastal mudflats or sands that are irregularly inundated. It occurs within the assoc. Suaedo maritimae-Salicornietum patulae. Salicornia emerici occupies the lowest coastal mudflats, regularly inundated, where nutrient-rich conditions prevail, and forms an almost monotypical assoc. Salicornietum emerici. Due to the synonymy of S. veneta with S. emerici, we exclude the occurrence of S. veneta in Croatia as an independent taxon.
Keywords: botany, vegetation, Croatia
Published: 28.03.2017; Views: 363; Downloads: 207
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