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Hodnocení vlivu výstavby a provozování stezek Singletrail Moravský kras na vitalitu korun okolo rostoucích dřevin
Hrnčiarová, Slavomíra
HRNČIAROVÁ, Slavomíra: Evaluation of the Impact of the Construction and Operation of the Moravian Karst Singletrail (Singletrail Moravský kras) on the Vitality of Crowns of Trees Growing Nearby. [Master's thesis] – Mendel University in Brno. Faculty of Forestry and Wood Technology; Department of Landscape Management. Supervisor: doc. Ing. Petr Hrůza, Ph.D. Brno: Mendel University, 2019. In a number of instances, the role of forests is no longer tantamount to that of a mere source of wood. Rather, they are widely perceived as places of recreation. In conjunction with the ever-increasing trend of recreational use of forest stands, the question arises as to the extent to which such activities have been reflected in the overall vitality and stability of forest stands as well as of entire ecosystems. The thesis focuses on evaluation of the impact of the operation of the Moravian Karst Singletrail (Singletrail Moravský kras) on the vitality of trees in its immediate proximity. Using the ICP – Forests methodology, basic habitual properties with respect to selected routes of the Moravian Karst Singletrail (Singletrail Moravský kras) have been evaluated.
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Determination of stress of Norway spruce by direct methods
Krejza, Jan ; Světlík, J. ; Bellan, Michal ; Horáček, Petr
The aim of this methodology is to introduce methods of forest ground monitoring leading to evaluation of Norway spruce tree vitality. Certified methodology describes: measuring of the stem surface temperature by thermography, measuring of the sap flow, measuring the stem diameter fluctuation and by the analysis of xylogenesis and wood morphology. Emphasis was placed on the detection of the stress reaction before occurrence of the visual symptoms. The aim of this methodology is to present a comprehensive set of methods for measuring ecopysiological activity of a tree and to determine its health status. The goal of this methodology is to provide a unique tools for foresters and for forest management for direct and precise evaluation of health status of individual trees, but also a whole complexes of forest from the ground perspective. The individual methodological approaches are defined, can be used in practice and their interpretation is unambiguous. The novelty is based on the direct measurement of the physiological activity of the individual trees, which exclude any degree of subjectivity in the evaluation process.
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Vliv různého typu poškození stromu na obsah nestrukturálních sacharidů u smrku ztepilého
Holasová, Veronika
The aim of the thesis was to investigate concentrations of nonstructural carbohydrates (soluble saccharides and starch) in various organs of damaged Norway spruce (Picea abies (L.) Karst.) trees. The damages of trees were girdling, xylem disruption, cutting off the roots and inoculation by Armillaria sp. The samples of the roots, xylem, bark with phloem and needles were collected in September 2013 and 2014. There were statistically significant differences in starch concentration in needles collected in September 2013; high starch concentrations were detected in girdled trees, while the lowest values achieved trees with xylem disruption. Another significant divergence was found in the concentration of soluble carbohydrates in needles collected in September 2014; the concentration of soluble carbohydrates in the control trees was significantly higher than in trees with cut roots. Other differences in the concentrations of nonstructural carbohydrates variously damaged trees and control trees were not statistically significant. Given the number of factors affecting the concentration of nonstructural carbohydrates -- especially financial and time factors -- they are not suitable as a simple and reliable indicator of tree vitality. However the data provide a deeper insight into the tree functioning after the damage. Inclusion of this information into the process based models will help to more accurate predictions of tree mortality.
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