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Application for Tree Stability Measurement
Šoltés, Jakub ; Kolář, Martin (referee) ; Polok, Lukáš (advisor)
This thesis is concerned with the subject of tree stability under a wind load. It defines, what the tree stability is, which techniques are used for its measurement and why it is important to determine it. It describes development process of application, that examines tree stability. Furthermore it analyses available the development tools, discusses a design and an implementation of the application written in C# language. Application has been created using .NET Framework along with graphical subsystem Windows Presentation Foundation following the design pattern Model View ViewModel. The result of this thesis is a desktop application aimed on Windows operating system. It can compute stability coefficient of the tree using information about trees‘ geometry and its environment. The value of stability coefficient is commonly used for tree safety inspection.
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Vliv smíšení porostu na dynamiku růstu borovice lesní (Pinus sylvestris L.) ve Finsku
Vyčítalová, Hana
Mixed stands excel in their species richness and they theoretically have a better precondition for coping with disturbances than monocultures. On the other hand, there is interspecies competition, which may result in the oppression of individual species in the ecosystem. A total of 12 research plots in the province of North Karelia (Finland) were selected to approximate the effect of forest mixing on the growth of Scots pine (Pinus sylvestris L.). In growing season 2018, stem volume changes and drought stress responses were observed in monocultures and with the admixture of one or both of the species Norway spruce (Picea abies L.) and Silver birch (Betula pendula Roth.). The measurement of volume changes was performed using point dendrometers installed on individual pines, the temperature and soil moisture were monitored by a TMS-4 sensor located in the soil in the middle of each research area. It was found that in all cases, Scots pine grew only in dependence on rainwater, not groundwater. It was discovered that individuals in monoculture grew up to twice as much as in both types of mixed stands. They also showed a better ability to saturate the tissues with water after it had been spent for transpiration during the July drought. In August, however, the response to drought stress was comparable in monocultures and mixed stands. The measured results show that interspecific competition may have a negative effect on the growth and drought tolerance of Scots pine in the short term. However, at a time of escalating extreme climate events around the world, this issue needs to be further explored in order to create optimal conditions for the growth of future forests.
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Application for Tree Stability Measurement
Šoltés, Jakub ; Kolář, Martin (referee) ; Polok, Lukáš (advisor)
This thesis is concerned with the subject of tree stability under a wind load. It defines, what the tree stability is, which techniques are used for its measurement and why it is important to determine it. It describes development process of application, that examines tree stability. Furthermore it analyses available the development tools, discusses a design and an implementation of the application written in C# language. Application has been created using .NET Framework along with graphical subsystem Windows Presentation Foundation following the design pattern Model View ViewModel. The result of this thesis is a desktop application aimed on Windows operating system. It can compute stability coefficient of the tree using information about trees‘ geometry and its environment. The value of stability coefficient is commonly used for tree safety inspection.
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Monitoring dynamiky vývoje v přirozených lesích ponechaných samovolnému vývoji‚ zpracování metodiky výběru území se společenstvy určenými k ponechání působení převážně přírodních sil‚ návrh metod a postupů péče o tato území
Správa ochrany přírody, Praha ; Agentura ochrany přírody a krajiny ČR, Praha ; Tesař, Vladimír ; Vrška, Tomáš ; Adam, Dušan ; Janík, David ; Hort, Libor
Základním cílem projektu je provést opakovaná podrobná šetření dendrometrická, fytocenologická, pedologická a strukturní v síti přirozených lesů v ČR ponechaných samovolnému vývoji. Na základě těchto šetření pak provést podrobné analýzy změn ve dřevinném i bylinném patře těchto lesů, v půdních poměrech i ve struktuře a textuře porostu. Mimo síť přirozených lesů s podrobným výzkumem dynamiky vývoje založit monitorovací síť v lesích ponechávaných samovolnému vývoji vycházející z jednotné metodiky sběru a zpracování dat. Cílem monitoringu je získat základní údaje pro charakteristiky lesních ekosystémů, které budou sloužit k zachycení vývojových změn v časové řadě. Zároveň je cílem projektu komplexní uchopení a vysvětlení teorie obnovního managementu lesních ekosystémů a její definování pro podmínky ČR.
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