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Hodnocení stavu a vývoje sukcese po lesním požáru na kalamitní holině v revíru Janov, LS Jeseník – Lesy ČR, s. p.
Kmínková, Michaela
This bachelor's thesis concern with the investigation of the state and development of the secondary succession after the forest fire, which occurred in 2018 on a calamitous clearcut in the area of Janov, LS Jeseník - LČR, s. p. with a size of 6.75 ha. The assessment method was to evaluate the data from the field survey on 5 test plots, where I determined the type of tree species and forest regeneration, given dendrometric parameters - height and accrue, representation of the tree floor, I also evaluated the damage of regeneration and the development of unwanted vegetation. These values were measured in circular plots with a number in the range of 25 – 33. The plots were located both at the site of the fire and outside of it, with and without fencing. Aspen (Populus tremula L.) was the most numerous tree species in the area under investigation, with the largest presence in the area of the fire with fencing. With the greatest increase in height, the willow (Salix caprea L.) dominated here. The most frequently occurring damage was bite and frost damage occurring on the fireground outside the fence. Therefore, fencing proved to be an effective protection against game in this locality. The area outside the fence and the fireground was covered the most with unwanted plants.
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Vliv duální mykorhizy na příjem těžkých kovů vybranými dřevinami čeledi Salicaceae
Kuchár, Michal ; Mrnka, Libor (advisor) ; Kolaříková, Zuzana (referee)
3.2. Abstract Soil contamination by heavy metals represents rather serious environmental problem for both human health and an environment itself. One of the perspective technologies dealing with this threat that only recently has been intensely developed is phytoremediation by means of short rotation coppice plantations. As plants used in this technology (mostly poplars and willows) host two major groups of mycorrhizal fungi substantially influencing plant physiology it is important to study plant-mycobiontheavy metals interactions rather than just plant-heavy metals interactions. The present thesis aimed to contribute to the growing knowledge of the field by search for suitable mycobionts of poplar or willow tolerant to heavy metals, by evaluating an activity of the key antioxidative enzyme in selected mycobionts and by looking at physiological responses of plant hosts to their mycobionts in a soil polluted by heavy metals. The first experiment in vitro focused on screening of morphometric criteria of fungi growing on solid growth media amended with mixture of heavy metals. Based on the results, several tolerant ectomycorrhizal strains were chosen for the next inoculation of fast growing trees serving phytoextraction and phytostabilisation strategies. The second, re-synthetic experiment was conducted in...
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