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TREELINE DYNAMIC IN THE MT. KRALICKÝ SNĚŽNÍK
 Kolář, Václav ; Treml, Václav (advisor) ; Šenfelder, Martin (referee)
Treeline dynamic in the Mt. Kralický Sněžník Abstract Changes in treeline positions have been recorded both in the mountains of Central Europe and worldwide. The treeline upward shifts have been recently influenced particularly by rising temperature and reduced human impacts in the highest parts of the mountains. The goal of this thesis is to evaluate dynamics of treeline in the Mt. Kralický Sněžník and to determine influencing factors. Dendrochronological methods were employed to determine age structure of spruce across the ecotone and the analysis of aerial images was used to identify changes of spruce coverage between 1936 and 2014. I found that tree age is decreasing with increasing elevation - an evidence of advancing treeline. Treeline upward advance indicated by a gradual densification of spruce stands was also detected from aerial images. Seedling abundance is negatively affected by dense mats of blueberry in the upper part of ecotone. Mortality of spruce is rising with increasing elevation,which indicates the negative influence of extreme climatic conditions in the uppermost parts of ecotone. Age structures and aerial images show that the treeline advance in the Mt. Kralický Sněžník was caused by a combination of land abandonment at the end of 19th century supplemented by afforestation in the lower...
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