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Imprints of history in post-agricultural forests
Vojta, Jaroslav ; Suchara, Ivan (advisor) ; Honnay, Olivier (referee) ; Tichý, Lubomír (referee)
IMPRINTS OF HISTORY IN POST-AGRICULTURAL FORESTS Ph.D. Thesis Jaroslav Vojta Charles University in Prague, Faculty of Science Praha, 2010 Promotor: Ivan Suchara List of original papers I. Relative importance of historical and natural factors influencing vegetation of secondary forests in abandoned villages (Jaroslav Vojta - Preslia 79: 223-244) II. Land use legacies in post-agricultural forests in the Doupovské Mountains, Czech Republic (Martin Kopecký & Jaroslav Vojta - Applied Vegetation Science 12: 251-260) III. Woody vegetation continuity, topography, and distance to ancient forests have complex effects on the vegetation and species richness of abandoned pastures (Lucie Drhovská & Jaroslav Vojta - submitted) 1 Introduction Land use changes have had a profound effect on vegetation cover. Often, succession results in the recovery of forests on former agricultural land. As areas of post-agricultural forests become increasingly prominent in landscapes of developed countries, these processes have attracted the attention of ecologists. Many questions have arisen regarding the possibility of restoring original forest communities on former agricultural lands (Flinn and Vellend, 2005; Hermy and Verheyen, 2007). At the same time, current and past land use changes could be seen as "natural experiments" that could...
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Fire as an alternative way of the landscape management
Maximov, Fedor ; Novák, Jan (advisor) ; Adámek, Martin (referee)
Prescribed burning is a method that has been used since prehistoric times to keep unforested areas. In pastures, fire was used to remove dead biomass, return nutrients to the soil and improve forage quality, as well as to convert forests fields to a shifting agriculture. The abandonment of burning in the last century has led to an accumulation of plant biomass in the landscape. This, combined with global warming, is now creating the threat of dangerous fires. In 2022, controlled burning was allowed in the Czech Republic as a way of managing habitats that are at risk of becoming woodland without proper management. Rare heliophilous plant and animal species are tied to them. It would therefore be advisable to reintroduce this management method, together with monitoring and control of its effects on species and communities. The aim of this backelor thesis is to summarise the existing knowledge about prescribed burning in Europe. It also describes how controlled burning affects the dynamics of dry grasslands and heathlands. The main focus is on attributes of controlled burning that can be used to maintain selected habitats. Keywords: fire, vegetation, landscape management, succession
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Football Recycling
Vlček, Filip ; Jemelka, Vojtěch (referee) ; Sedlák, Jaroslav (advisor)
The former Brno stadium Za Lužánkami, located on the border of the Botanical Garden of MENDEL, the wild hillside Planýrka and Lužánky Park. Thanks to the clay mass of the stands and the fact that the last official match was played at the stadium in 2001, nature is beginning to take over. It is therefore possible to leave the stadium to continue to create specific conditions for different plant species, but at the same time to use the potential of the standing reinforced concrete structure in its southern part and hand it over to the student association? Finding a suitable solution for this situation and avoiding the gentrification of other urban spaces was my goal in of this thesis.
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Investigating associations of saproxylic beetles with forest structure through the analysis of species composition and feeding guilds
KOZEL, Petr
The thesis contains studies focusing on various forest biotopes of Central Europe and saproxylic beetles as a model group for forest ecology research. In the review, current knowledge about the threats for forest biota, mainly saproxylic beetles are discussed in the context of species composition and trait-based approach. Various stages of succession in the patches of disturbed forests, their connectivity, the introduction non-native tree species, and the assessment of feeding guilds using stable isotopes are studied in the relation to saproxylic beetles in separate chapters.
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Supporting grassland biodiversity through small-scale fallows
Fabšičová, Martina ; Frei, I. ; Jiroušek, M. ; Smetanová, S. ; Šipoš, Jan ; Trnka, F. ; Vymyslický, T. ; Winkler, J. ; Zdražílková, M.
The main goal of the methodology presented here is to propose a system of recommendations for applying fallow in nature conservation based on our experiments. Due to the independence of agricultural land outside specially protected areas with direct payments from the Ministry of Agriculture, it is currently important to apply the methodology, especially in large protected areas where the primary objective is to preserve natural and cultural heritage. Annual and perennial fallows, i.e. biotopes adapted toregular soil disturbance, offer suitable habitats for a number of now-threatened plant and animal species. This is a technically and economically easy solution, but it is challenging to select a suitable location to achieve maximum efficiency. Ploughing must not be used in species-rich grasslands which would lead to ruderalization and degradation of the native vegetation. Furthermore, it must not be carried out on land at risk of erosion. Linear grassland margins, which have been ploughed in the past, recently grassed fields, fallows, and field margins should be selected for fallow management. Nearby populations of invasive plant species can be a problem. Our recommendations for the use of fallow management relate primarily to land in lowland and upland areas with a lower soil nutrient supply.
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Development Strategy of Family Business
Bednář, Jan ; MBA, Petr Jarchovský, (referee) ; Koráb, Vojtěch (advisor)
This diploma thesis deals with the topic of strategic development of the family business. In the theoretical background chapter, it describes family business, strategic management and change management. In the practical background chapter, it builds and implements a new strategic business plan according to the theoretical background and the analysis of the external and the internal business environment.
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Nástupnictví v rodinných podnicích
Slavíková, Lucie
This thesis focuses on the topic of succession in family firms. It focuses on the handover of the firm to the next generation and the measures that both, the transferor and the successor, have to take to make the handover successful. The topic of succession has been very topical in the last few years for family firms in the Czech Republic, which started to be established after 1989. The founders are now approaching retirement age and are dealing with who to pass their business on to, whether the descendants will build on their success and whether generational change will take place. The aim of this thesis is to define the main factors that influence the succession and to propose the optimal way of handing over the company to the next generation, based on the conducted expert research on this issue. In the practical part, selected family businesses with whom in-depth interviews are conducted are presented. On the basis of the evaluation of the obtained information, measures leading to the easiest possible succession transfer in a family business are proposed.
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Stav a potenciál přirozené obnovy po kalamitě na revíru Polana, LS Jablunkov
Dyrčík, Vojtěch
The aim of the presented thesis was to evaluate the status and potential of natural regeneration in relation to the condition of surviving individuals of the parent stand after a bark beetle calamity. The locality of interest was the Polana forest district, located in the territory of the Jablunkov forest administration. Five representative stands were selected for the field survey, where after the death of the spruce stand component, there remained in the upper stage individuals of the parent stand, mostly beech (Fagus sylvatica L.). As the number of beech (Fagus sylvatica L.) individuals in the parent stand increased, so did the frequency of rejuvenation of this tree species. In places where there was less beech (Fagus sylvatica L.), spruce (Picea abies (L.) Karst) and white birch (Betula pendula Roth) became more prominent. The most abundant species in the parent stand were beech (Fagus sylvatica L.), sycamore (Acer pseudoplatanus L.) and larch (Larix decidua Mill). A relationship between the rejuvenation of beech (Fagus sylvatica L.) and the condition of the parent stand was also found in the area where the regeneration inventory was repeated. Here, the natural regeneration of Norway spruce (Picea abies (L.) Karst) was more pronounced,as well. In contrast to beech (Fagus sylvatica L.), its abundance in the regeneration decreased after two years.The areas of interest can be considered as restored to 94 % of the total area, of which 77 % was created by natural regeneration alone and 17 % by combined regeneration. In 6 % of the area, rejuvenation gaps need to be filled.
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Přirozená obnova po odumřelém smrkovém porostu na Školním lesním podniku „Masarykův les“ Křtiny
Krásenský, Jiří
The aim of this thesis was to determine the state and potential of natural regeneration under dead spruce stands. The research was conducted at two locations in the vicinity of Brno within the University Forest Enterpise Masaryk Forest in Křtiny. A research plot was established at each location, consisting of three consecutive variants: stand, partial cut and clearcut. A network of circular sample plots was established in each variant to determine the state of natural regeneration. The investigation also included an analysis of seed fall in the stand and partial cut variants. It was found that the lowest mortality occurred under the dead spruce stand, compared to the other variants, and the largest number of seedlings were found there. The most common tree species that regenerated under the dry stand was spruce. The seed bank under the stand contained a more diverse range of seeds than under the partial cut.
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