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Mortalita podsadeb buku lesního a jedle bělokoré vyzvednutých z přirozené obnovy
Gattnar, Matyáš
The main aim of this bachelor thesis was to evaluate the mortality of seedlings of white fir (from three different natural forest areas) and beech, which were collected and transplanted under spruce forest. The research was carried out in the Moravian-Silesian Beskydy Mountains in the Kyčera area, which is under the administration of the Forestry Service of the Czech Republic. Two decaying spruce monocultures were used. Several variants of forest beech and white fir from three different natural forest areas (Beskydy, Jeseník, Žďár) were planted on the nutrient habitats. The best results were obtained for the variant of rooted beech, which was planted in the spring of 2022. Of the fir trees, those taken from the Beskydy area fared best.
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Decisions in seed reproduction in plants
Mašková, Tereza
Seed reproduction is a key part of the life cycle of the most plant species. It allows for the dispersal of species in space and time and, thus, significantly affects dynamics of plant populations and communities. Seed formation, germination and seedling establishment are subjected to selection pressures from the environment and lead to optimization of maternal investments (maternal care), manifested by the number of seeds and amount and composition of nutrients stored in individual seeds. The thesis aims to answer two questions: (i) whether maternal investments in terms of seed mass and seed nutrient stoichiometry is optimized according to the environmental conditions in which seedling development is expected and (ii) how nutrient availability, considering nutrients both stored in the seed by the mother plant and those available in the substrate, affects seedling growth and development. To answer the first question, we focused on interspecific comparisons of seed nutrient stoichiometry linking it with data on seed mass and species niche along gradients of nu- trient availability. We used a phylogenetically informed comparative approach to explore the ratio between phosphorus, nitrogen and nonstructural carbon in seeds from 510 wild herbaceous species. We analyzed seed nutrient stoichiometry with...
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Comparison of Moringa yields in tropical areas and green house in temperate zones
Opoku, Emmanuel
Moringa oleifera is a plant with high nutritional value so it may be used as food for both humans and animals, also it is widely known in traditional medicine. Main aim of this study was to compare the yield of Moringa in a greenhouse at a temperate zone and a tropical zone. The study was carried out in Techiman, a city in Ghana as the tropical experimental site and greenhouse of Mendel University in Brno, Czech Republic as the temperate site. The number of seedlings germinated was recorded after 7, 12, 17 and 22 days. The highest number of seeds germinated after 7 days in the tropical region and the least occurred after 7 days in the greenhouse. The height of the seedlings was recorded after 7, 21 and 35 days, the average height from the greenhouse seedlings and tropical experimental site were 20.63 cm and 29.14 cm. Germination rate for the tropics was 35 % in case of greenhouse only 25.8 %. This can also be concluded from this experiment that, Moringa oleifera is adapted to conditions of the tropical zone but can also grow in greenhouses in temperate zones.
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Decisions in seed reproduction in plants
Mašková, Tereza
Seed reproduction is a key part of the life cycle of the most plant species. It allows for the dispersal of species in space and time and, thus, significantly affects dynamics of plant populations and communities. Seed formation, germination and seedling establishment are subjected to selection pressures from the environment and lead to optimization of maternal investments (maternal care), manifested by the number of seeds and amount and composition of nutrients stored in individual seeds. The thesis aims to answer two questions: (i) whether maternal investments in terms of seed mass and seed nutrient stoichiometry is optimized according to the environmental conditions in which seedling development is expected and (ii) how nutrient availability, considering nutrients both stored in the seed by the mother plant and those available in the substrate, affects seedling growth and development. To answer the first question, we focused on interspecific comparisons of seed nutrient stoichiometry linking it with data on seed mass and species niche along gradients of nu- trient availability. We used a phylogenetically informed comparative approach to explore the ratio between phosphorus, nitrogen and nonstructural carbon in seeds from 510 wild herbaceous species. We analyzed seed nutrient stoichiometry with...
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Decisions in seed reproduction in plants
Mašková, Tereza ; Herben, Tomáš (advisor) ; Thompson, Ken (referee) ; Těšitel, Jakub (referee)
Seed reproduction is a key part of the life cycle of the most plant species. It allows for the dispersal of species in space and time and, thus, significantly affects dynamics of plant populations and communities. Seed formation, germination and seedling establishment are subjected to selection pressures from the environment and lead to optimization of maternal investments (maternal care), manifested by the number of seeds and amount and composition of nutrients stored in individual seeds. The thesis aims to answer two questions: (i) whether maternal investments in terms of seed mass and seed nutrient stoichiometry is optimized according to the environmental conditions in which seedling development is expected and (ii) how nutrient availability, considering nutrients both stored in the seed by the mother plant and those available in the substrate, affects seedling growth and development. To answer the first question, we focused on interspecific comparisons of seed nutrient stoichiometry linking it with data on seed mass and species niche along gradients of nu- trient availability. We used a phylogenetically informed comparative approach to explore the ratio between phosphorus, nitrogen and nonstructural carbon in seeds from 510 wild herbaceous species. We analyzed seed nutrient stoichiometry with...
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Growth and mortality of natural regeneration after dieback of tree layer of mountain spruce forest
Červený, Jan ; Bače, Radek (advisor) ; Synek, Michal (referee)
The aim of this study is to assess the state of the natural generalization after the death of the upper tree layer in the mountain spruce forest, based on data acquired on permanent research area (50x50 m) where the collection of the data is in progress since 2006 in the area Trojmezná. These areas were damaged by hurricane Kyrill and afterwards bark beetle calamity in 2008. In these areas were defined squares of size 5x5m and they were divided into cells 0,5x0,5m and these shelf is recorded every individual, the increment, health and microhabitat. By the analysis which was carried out, was found, that woody representation is not different from the representation of upper tree layer, the number of spruce is 97% and 3% of the crane. Most individuals were caught before the disturbances, the youngest individuals germinated in 2006. Higher individuals achieve higher gains than smaller individuals, it means that the heterogeneity of the height structure is increasing. Based on analysis of mortality individual squares (50x50m) was found that after the disturbance on TVP new places without trees were not formed. The dependence of mortality on frequency of individuals in the cells (0,5x 0,5m) has not been demonstrated. That means that mortality of individuals at intraspecific competition is yet significantly independent, although abundance exceeded 17 individuals per cell. Eight years after disturbance is mortality very low. The highest regeneration grows up to 20 cm per year.
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The role of wood decay fungi in the dynamics of a mountain spruce forest
POUSKA, Václav
This thesis is focused on environmental preferences of wood-decaying fungi and their relationships with forest structure and development. Relationships of fungi to properties of wood and forest stands were studied on the basis of field observations in Central-European mountain spruce forests. Plot-based approach was used to reveal a general pattern in the diversity of fungi within a single forest stand and between different stands. The analysis of stand structure provided a background for plot-based approach. Substrate-based approach was used to study single species preferences and their communities. In addition, the influence of wood properties (including fungi and their rots) on the regeneration of spruce on logs was studied.
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