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The influence of forest on the occurrence of N-year flows in the basin
Doleželová, Hana ; Zemanová, Šárka (referee) ; Kozel, Tomáš (advisor)
The thesis deals with the influence of forest on n-year flows in the catchment near Staré Město pod Landštejnem. The aim of the thesis was to perform a schematization of the selected catchment and to determine the necessary parameters for the selected method, with the help of which the simulation of the rainfall-runoff process was carried out. The simulations were carried out on selected episodes during which the forest characteristics changed due to deforestation. Furthermore, simulations were performed in which the forest vegetation was changed to fields and meadows. Variants where RAIN-6H was used were also simulated. The model was built in the HEC-HMS program, in which the SCS Curve Number, SCS Unit Hydrograph and Muskingum methods were selected for the calculation. In the conclusion of the thesis, the model building and the course of the simulated episodes are summarized. Furthermore, the water retention capacity of the area of interest is evaluated.
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Vliv deforestace krajiny na využívání původních druhů rostlin v okrese Sen Monorom, Kambodža
Chalupová, Karolína
The bachelor thesis focuses on the extent of landscape deforestation in Cambodia and its impact on the use of native plant species in the Sen Monorom district. To solve this problem a literature search and field research were used. Field research shows monitoring of the occurence and ways of using the native species of the district. Last but not least, a questionnaire survey was used, which focuses mainly on the objective and subjective perception of deforestation. The results of the work show that the deforestation in Cambodia is still increasing. Many species have succumbed to the onslaught of illegal logging and excessive demand. If there is no change in the system and forestry, it’s possible that Cambodia will lose another part of its biodiversity.
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Impacts of deforestation of west African mountains on biodiversity
Stříbrská, Eliška ; Hořák, David (advisor) ; Reif, Jiří (referee)
The high rate of deforestation is a global problem with negative impacts on species biodiversity and it also contributes to global and local climate changes. This problem is much more urgent in hotspots of biodiversity and endemism like west African mountains. Moreover, these locations are now recognized as the most fragmented and the most deforested mountains on the African continent. Impacts on local organisms is mostly negative. The organisms are facing habitat loss and the inability to migrate between the isolated regions. The bond between associated animals and plants, that are life depend on each other, is being broken and the whole ecosystem is being changed. In general, the ecosystem is less stable and all these changes make deforestation a chain reaction. Although there are some positive impacts on the biodiversity too, it does not influence the endemic species. It has more positive consequences for the generalist species occupying wide range of habitats and utilizing various food resources. Local communities are also facing the impacts of the ecosystem changes, their lives are negatively influenced by longer and more intensive periods of drought, landslides and they are not able to rely on the supply of the forest products. To be able to change current situation, financial support and...
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Evaluation of global changes of forest land based on remote sensing
Hladká, Anna ; Štych, Přemysl (advisor) ; Kupková, Lucie (referee)
Evaluation of global changes in forest area based on remote sensing data Abstract: The aim of this project is using remote sensing data to assess change in global forest area. This work should give the outline of the principles of land cover classification, with a focus on forests based on satellite images, but also show a real solution in the evaluation of changes in forest areas in two selected regions. The first part is performed a literature review of all aspects of this sub-topic from the basic principles of remote sensing across the typology and characteristics of satellite sensors, which are giving the satellite images to land cover classification systems and characteristics of forest area. The next section describes the basic procedure for classification of satellite imagery and its possible variants. In my work there are explain the image corrections, the supervised and unsupervised classification, the method of checking the accuracy of classification or use of software. Selected area for my work was Riau in Indonesia and state of Oregon, USA. To these regions there are demonstrated practical procedure for classifying land cover and then its changes from the forest areas. In conclusion of my work the results are discussed and compared with available land cover databases. Key Words: Remote Sensing,...
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Vliv fragmentace a ztráty habitatu na primáty
Sniegon, Arthur F. ; Sedláček, Ondřej (advisor) ; Pluháček, Jan (referee)
Anthropogenic activities and human encroachment may cause profound and often irrevocable changes in an environment. This may result in challenges for most of the wildlife, including our closest extant relatives, non-human primates. Worldwide, primates may be particularly susceptible to human-induced habitat alterations owing to their large body size, social way of life, slow reproduction, large home-ranges, naturally low population densities and often strong dependence on forest cover. Three main phenomena have been described as major threats for primates: loss of the natural habitat and its conversion to human-dominated landscape, fragmentation of the remaining patches of suitable habitat, and commercial bushmeat hunting. Here I review the first two processes. If primates survive the initial disturbance, they are forced to adjust their demographic, behavioural and dietary traits. However, this may not be enough for their persistence in a long term as their genetic diversity might be compromised. Moreover, also parasitic infections may impact severely the disrupted populations. In this thesis, I reviewed the current knowledge in primates demography, population genetics, dietary changes and parasite interactions in altered habitats. Most of the studies examined the African continent and Latin America, a...
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Evaluation of global changes of forest land based on remote sensing
Hladká, Anna ; Štych, Přemysl (advisor) ; Kupková, Lucie (referee)
Evaluation of global changes in forest area based on remote sensing data Abstract: The aim of this project is using remote sensing data to assess change in global forest area. This work should give the outline of the principles of land cover classification, with a focus on forests based on satellite images, but also show a real solution in the evaluation of changes in forest areas in two selected regions. The first part is performed a literature review of all aspects of this sub-topic from the basic principles of remote sensing across the typology and characteristics of satellite sensors, which are giving the satellite images to land cover classification systems and characteristics of forest area. The next section describes the basic procedure for classification of satellite imagery and its possible variants. In my work there are explain the image corrections, the supervised and unsupervised classification, the method of checking the accuracy of classification or use of software. Selected area for my work was Riau in Indonesia and state of Oregon, USA. To these regions there are demonstrated practical procedure for classifying land cover and then its changes from the forest areas. In conclusion of my work the results are discussed and compared with available land cover databases. Key Words: Remote Sensing,...
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Protection and Economic Development of the Brazilian Amazon as an International Political Topic
Ilievová, Ester ; Němec, Jan (advisor) ; Paulenková, Kristína (referee)
This bachelor work deals with the problem of the Amazon rainforest and examines relations between protection of Amazonia and economic development in this region. The main goal is to analyze connections between economic development of the brazilian part of the Amazon basin and preservation of the environment in this area and to examine if the economic development is connected to the destruction of the Amazon rainforest and possibly to what extent, and if Amazonia has the chance to reach sustainable development and to save its unique environment for next generations, which is analyzed on the case study of the brazilian Amazon. This work also deals with engagement of chosen international players and their attitude to the issue of the Amazon rainforest. A serious problem of this region is the deforestation of the Amazon rainforest, which is very often connected to the economic development. However, the brazilian government managed to reduce considerably the deforestation rate in recent years. International cooperation and engagement of non-governmental organizations, apart from engagement of governments, is also very important. It has already provided many results, from which we can conclude a positive development in this issue.
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Sociálně ekologické aspekty dovozu sóji do České republiky
Řehánek, Štěpán
This bachelor thesis contains brief description of division Magnoliophyta, class Rosopsida, family Fabaceae, order Glycine and species Glycine max. Further follows information about cultivation, usage and history of soy cultivation. Principal theme is soy production, the biggest world producers, international trade and import to Czech Republic. Czech statistical office website shows, where is soy imported from and its quantity/value. Last part of the work is focused on ecological aspects of soy production in countries importing soy to Czech Republic and its impacts on local population.
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