This study is focused on a phytogeographic analysis of the distribution of selected xero thermophilous herb taxa along the Sázava Canyon in Central Bohemia. The research was done in 62 localities scattered along the major river stretch from Ledeč nad Sázavou to the confluence of Sázava with the Vltava Riever. The Sázava River was divided according to the river mileage into 8 even sections where there were 6 or 7 larger representative localities further selected. In each locality there was obtained the semi quantitative floristic inventory of species according to a pre prepared check in list with 57 taxa, further a detailed exploration of the locality was performed including the measurement of the area (in ha), direct perpendicular distance to the Sázava riverbed (in km), distance of the locality related to the river mileage, proportion of slopes of southern expositions, by means of conservative method using paper maps, calculation of the coefficient of variation of local altitudes (i.e. the assessment of vertical complexity), reading of geographical coordinates by tourist GPS receiver and finally a detailed determination of bedrock types at individual localities. The results were processed and then statistically evaluated in the program CANOCO software for multivariate analyses. The CANOCO program calculated that the influence of species composition in the given areas describes approximately 8.6 % of the total variability of individual species. This influence is proven to be statistically significant on the alpha level = 5%. The analysis, using observed data, calculated that 28.9 % of total variability of the vegetation composition in the studied floristic areas is influenced by the chosen variables. This work may serve as a comprehensive resource of the sites for future research, also it brings a valuable floristic data for the nature conservation purposes.
The aim of the diploma thesis was to map the incidence of vascular plants along the various categories of roads and crossroads at different altitudes and in different contact habitats (forests × meadow) and identify invasive species. The species were mapped to a total of 120 sites, including 45 sites accounted for forest roads, 40 sites meadow paths and 35 sites forest crossroads. There were found 3 strongly endangered species and 5 endangered species. From the total non-native species was found a large proportion of naturalized and invasive species that could potentially threaten natural communities. DCCA analysis was found that the species composition invasive plant reacts to the individually environmental variables statistically significant. It was also found large share of competitive strategies, and a small share of stress-tolerant strategists. Furthermore, it was found that the species composition of the flora responds to altitude statistically highly significant. DCA analysis was found affiliation species to categories of roads and crossroads, level of traffic and to contact habitats. Furthermore was used CCA analysis. It was found that the species composition of the plant reacts to the presence of trees present in the surrounding vegetation statistically highly significant. Part of the work has also been gathering literature data about the relationship between flora and roads, vectors of spread plants and alien species and flora of roads in Jizera mountains. The results were compared with other works, and complemented by own knowledge of the author, in the discussion. Contribution of work consists in mapping the flora of roads and crossroads in many locations in Jizera mountains, botanical supplement data and the identification of potentially invasive species expanding along the roads. The results of this study should serve as a basis for preventive or protectionist measures implemented in Jizera mountains.
The thesis presents the results of the research of the long term changes in semi-natural vegetation of lowland woodlands in the forest district Klínec (phytogeographical district Střední Povltaví, Central Bohemia, Czech Republic), which is located between the northeastern part of the Brdy Highlands (Hřebeny) and the Vltava River valley. Research of the long term changes over the past nearly 60 years was conducted by resampling vegetation on semi-permanent plots. Old relevés by V. Samek (1957), which were provided by the Czech National Phytosociological database, were used as reference data. Twenty-nine relevés were resampled, which were located using old data and GIS. The shift to shady plant communities (loss of heliophilous and expansion of shade-tolerant species) was found in the study area caused by higher canopy of tree and shrub layer due to the expansion of deciduous trees. Species richness (alpha diversity) was significantly declined. Homogenization of the vegetation was not significantly demonstrated in study area. Species of nutrient-rich habitats as well as alien and invasive species were expanded and fewer red list species of vascular plants was found. Vegetation change in the area was probably most affected by the change in forest management in lowland woodlands (decline of coppicing), eutrophication (deposition of nitrogen from the atmosphere, runoff from agricultural land) and the effect of forest animals especially wild boars.
The research was conducted in the growing season 2015 in selected wet and peaty meadows near Havlíčkův Brod (Bohemian-Moravian highlands). Phytosociological classification was carried out using the formalized Cocktail method, which assigns relevés by formal definitions, and method of assigning according to similarity of species composition (FPFI index). Nine vegetation groups were delimitated: seven at association and two at alliance level. Wet meadow of the association Angelico sylvestris-Cirsietum palustris is the most common community. Wet meadows of the associations Scirpetum sylvaticae and Lysimachio vulgaris- Filipenduletum ulmariae (both Calthion alliance) regularly occur. The stands of the associations Poo-Trisetetum flavescentis (Arrhenatherion alliance) and Poo trivialis- Alopecuretum pratensis (Deschampsion alliance) was documented at the drier edges of the localities. Thirteen species listed in the Red list of the Czech Republic were found. Dactylorhiza majalis, Tephroseris crispa and Valeriana dioica were the most abundant. Carex hartmanii, Carex paniculata, Eleocharis mammilata subsp. mamillata, Epilobium palustre, Pedicularis sylvatica, Potamogeton lucens, Comarum palustre, Scorzonera humilis, Sparganium erectum and Trifolium spadiceum occur rarely. Some localities (Bartoušov, Čistá, Dlouhá Ves-Pod silnicí, Mozerov a Skorkov) are suitable for statute significant landscape element for the occurence of these endangered species.
During the months of April and June 2014 the spruce bark beetle (Ips typographus L.) capturing was conducted into the pheromone traps followed by the verification of phenological model PHENIPS altogether at two study locations in the Czech Republic: Horní Planá in the southern Bohemia and Lipník nad Bečvou in the Olomouc region. The trapping was performed weekly with the help of pheromone tabular traps Theysohn which were equipped by pheromone-type evaporators Pheroprax from Chemipan. The aim of the study was to verify the validity of phenological model PHENIPS for the spruce bark beetle in the Czech Republic and verify whether the model is applicable for the Czech Republic. At the end of the 2014 season with the help of phenological models PHENIPS and the number of trapped bark beetle specimen the term of swarming and the term of colonization of host trees were determined. The sister generation activity was probably recorded in the several traps.
Boublík, Karel ; Hédl, Radim ; Roleček, Jan ; Douda, J. ; Svoboda, M.
This volume brings a set of studies presented during conference on forest vegetation.