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Rozsah, postavení a odrůstání jeřábu ptačího (Sorbus aucuparia L.) v Krkonošském národním parku
Koulová, Ladislava
The work was developed on the territory of the Giant Mountains National Park. The main objective was to determine the extent and the growth of bird crane in all levels for the whole NP. The measurements were carried out in the selected area of Horní Maršov, where several dozens of stands were visited and the JR was measured and registered. The game damage, height, thickness, position in the stand, representation and impact of the crane occurrence were evaluated. At the same time a detailed analysis of the crane output in the stands was carried out. of the KRNAP and the interest LHC. The crane is mainly found in lighted hedges, in pots and in places where there is no high pressure from the boar. There was no detectable difference in the growth in acidic and rich habitats. In dark SM cultures and BK stands, the recovery of JR does not occur. On the first floor there are cranes under SM stands in combination with BR and SM raids, some locations also show BK. In these phases, the crane is strongly attacked by animals that reduce growth and vitality. At a height of 3 meters, the JR is already grown for the game, reaching the second level. In the third floor there are already grown individuals. The Forest Economic Analysis analysis showed that crane representation is higher than the available literature. This may be due to purposeful management and accidental mining. The results of the in-depth investigation continue to indicate that the crane as a pioneering tree is alternated by spruce and beech within a large development cycle.
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