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Možnosti přirozené obnovy borovice lesní v genové základně 105 - Holická terasa
Nedomanský, Daniel
The mentioned thesis was engaged in Scotch pine natural regeneration (Pinus sylvestris L.) in genepool reservation 105 which is administrated by Forest cooperative Vysoké Chvojno. The current procedures of forest regeneration were assessed on this area. Five regenerated forest stands were selected for obtaining exact results. The two types of research plots were established in particular plots. In first type of plot were measured various parameters (total height, the last two increment diameter, root collar diameter, needles length) and features of individuals were evaluated (needles colour, crown shape, deviation from stem axis, trunk shape). In the second type of probed plots was investigated natural regeneration spatial structure and density. The financial costs calculation for natural and artificial forest regeneration was performed in the last part.
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Epigeická fauna v požářišti revíru Bzenec (LS Strážnice)
Prágr, Jakub
The aim of this thesis was to discover the actual condition of the epigeic fauna of a vast fire area (165 ha) in the first growing season after the fire in a habitat in Bzenec (LS Strážnice). Pitfall traps were used to determine the condition of the epigeic fauna. These were placed on sites deforested after the fire, in vegetation left to its natural successional development in a differentiated age after the fire and concurrently in unaffected vegetation. 16,267 specimens of 226 species of mostly epigeic fauna were caught. The impact of habitat conditions changed by the fire and timber harvesting were closely analysed for Carabidae, Araneae, Opiliones and Myriapoda taxons. There was a difference in the species composition of the epigeic fauna between the sites which were disturbed and undisturbed by the fire. Important factors that caused changes in the development and composition of the fauna after the fire were light conditions, humidity and trophic resources of the site. It was proved that the Pterostichus quadrifoveolatus (Carabidae) and Xerolycosa nemoralis (Araneae) species prefered the sites disturbed by the fire. The Carabus violaceus (Carabidae) or Harpactea rubicunda (Araneae) species were mostly bound to the sites undisturbed by the fire.
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Přirozená obnova a produkční potenciál borovice vejmutovky (Pinus strobus L.) v oblasti Městských lesů Hradec Králové
Vaněk, Petr
This dissertation thesis deals with two aspects of Eastern white pine. The first objective of this research was to evaluate the effect of the amount of solar radiation on the parameters of natural regenerated Eastern white pine individuals -- density, height, stem diameter, height increment and crown morphological parameters. The second objective of this work was to compare the production potential (stem volume, stock) of Eastern white pine and native Scots pine. For both purposes were selected forests stands with appropriate representation of Eastern white pine in Hradec Králové municipal forests. For the first objective study showed that the amount of light is a key factor in relation to Eastern white pine regeneration. Increasing amount of light significantly affects both density and growth parameters (height, stem diameter, height increment) of natural regenerated individuals. Effect of light on crown morphological parameters has not been proved. For the second objective evaluation of data showed that same old Eastern white pine in the same habitat reaches significantly greater stem volume than Scots pine in the order of several tens of percent, depending on the age of forests stand.
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