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Přirozená obnova lesa po disturbanci lýkožroutem smrkovým \kur{ (Ips typographus} L.)
 ROTOVÁ, Alžběta
This master's thesis focuses on evaluation of natural regeneration of forest in the non-intervention zone near Březník. Spectral data and spectral vegetation indices are examined and put in relation to terrain data for evaluation of the forest recovery. The highest gradation of bark beetle in the study area occurred between 1995 and 1998. Since then the tree defoliation accelerated the natural forest recovery. I assessed the forest recovery in 15 research plots and compared the recovery with the data collected by the Šumava national park in 2008 and 2009. Results of terrain measurement showed slight decrease in number of seedlings and saplings compared to years 2008 and 2009. Comparison of the field recovery data with the spectral indices revealed a regression relation between the natural regeneration and the vegetation indices. When comparing these data, the most suitable index for evaluating the natural regeneration was the index FRI2. The optimal time within the vegetation period for the evaluation of natural forest recovery using spectral data was also tested in this thesis. Results showed the optimum is at the end of spring and at the end of vegetation season. The highest rate of natural regeneration in our study area is on the west slopes of area Mokrůvky and on the south-west slopes exposed to high amounts of sunlight. Areas of closed forest formations are followed by areas where the forest regeneration is pure but the herbaceous vegetation is greatly developed. Results of the thesis show that spectral data and spectral indices are suitable for evaluation of forest recovery. The remote sensing methods bring the systematic data coverage for better understanding of the forest processes.
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