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Changes in land cover in the summit part of the Mt. Oblík (České Středohoří Mts.)
Kuna, Petr ; Demková, Katarína (referee) ; Treml, Václav (advisor)
Oblík, with his height 509.25 meters above sea level, is the dominant feature of the southwestern part of the České středohoří Mts. which is often referred to as Lounské středohoří Mts.. Geological environment and characteristic climatic conditions prevailing during the last Quaternary glaciation here prompted the creation of natural forest-free areas that are in form of isolated fragments of land preserved to this day. Oblík is one of the most important steppe sites in our area. Ever since the arrival of Neolithic man, the whole region Lounské středohoří Mts. influenced by human intervention. It can be assumed that the influence of grazing helped preserve important sites for steppe at Oblík. From preserved material can be observed the existence of forest on the northern slope. Currently, they are dominated by oak forests with trees such as oak winter (Quercus petraea) and oak (Quercus robur) with an admixture of hornbeam (Carpinus betulus). Contrast, the southern slopes covered many steppe species such as pheasant spring (Adonanthe vernalis), steppe sedge (Carex scales) or a total of five kinds of Stipa (Stipa sp.) and others. On Oblík there are several rare and endangered species that are of interest to the special protection of this National Nature Reserve. At present, the slopes with steppe...
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Importance of forest continuity and fragmentation according to beetles as an indicating taxonomic group
Loskotová, Tereza ; Treml, Václav (referee) ; Romportl, Dušan (advisor)
Importance of forest continuity and fragmentation according to beetles as an indicating taxonomic group Abstract Old-growth forests can provide suitable habitats for certain organisms which can't live in another type of environment. These organisms can be used as bioindicators of old-growth forests. Spatial organization of forests affects spatial distribution and population abundance of these organisms. Fragmentation process can negatively influence populations of forest organisms. In particular, the aim of this work was to locate areas with forest continuity within the area of interest and to characterize their spatial arrangement. Long-term continuity of forests was identified using historical maps. Spatial distribution of forests is not equal. In the northern and north-eastern part of the area, there is a large forest complex while in the southern and south-western part of the area, there is lot of forest fragments with surrounding of agriculture fields. Next target was to select beetle group with potential bioindicators of forest continuity. Many beetle species live in forests and the group fulfills requirements for indicating groups. Saproxylic beetles were chosen as a crucial group for a subsequent study. Keywords: continuity, fragmentation, indicator, landscape structure, beetles
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An analysis of exposure effect on treeline ecotone, Krkonoše Mts.
Ponocná, Tereza ; Chuman, Tomáš (referee) ; Treml, Václav (advisor)
The thesis deals with the influence of thermal conditions on the growth of the trees along the slopes with differing exposure to solar radiation in the alpine treeline ecotone in the Eastern Giant Mountains. Methodological approach was based on the measuring of the tree top and root zone temperatures, measurement of the dendrometric parameters (tree height, length increment) and radial increment of the Norway spruce (Picea abies). The results show only weak relation between significant temperature characteristics and exposure effect in the alpine treeline ecotone, which correspond to the growth rates of the sampled trees. Slightly higher temperatures were found on the south-facing slopes during the growing seasons in case of the closed canopy forest. Soil and air temperatures in tree groups were a bit higher on the north-facing slopes. In closed-canopy forest there was larger radial increment on south-facing slopes of Lu_ní hora, on the slopes of Malý Šišák there were similar growth trend on both slope exposures. In tree groups there were found larger increments on north-facing slope of Lu_ní hora, on the sampled sites of Malý Šišák there were found larger increment on south-facing slope during the 20th century, then in last decade larger increment was recorded on northfacing slope. Based on standard...
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Landscape character of the LPA Biele Karpaty
Demková, Katarína ; Treml, Václav (referee) ; Lipský, Zdeněk (advisor)
The landscape character has become a topical issue in many European countries in the 90's as well as in the Czech Republic. Since this period a lot of scientists and specialists of various branches have solved problems of the landscape character, the question of its terminology and evaluation. The master thesis is especially about the landscape character assessment (further only LCA). This question has been solved till today, also due to a new building law in the Czech Republic from 2006. The admission of this law means for the authorities of nature and landscape protection the statutory duty of including conditions of the protection of landscape character into the documents of territorial planning. A few methodologies of the LCA on the different area levels have been developed. The aim of the master thesis is a proposal of the methodology of the LCA and its application in the model area in the southwestern part of the Biele Karpaty Mountains (White Carphathians) in Western Slovakia. The model area is interesting because of an unique cultural landscape created by human activities and settlement during several centuries. In consequence of the social and the cultural diversity, the variety of folklore speech as well as due to typical kind of dispersed settlement ("crofts") the Landscape Protected Area Biele...
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RECENT DEVELOPMENT OF JELENÍ POTOK BROOK CHANNEL AND FLOODPLAIN
Čermák, Petr ; Treml, Václav (advisor) ; Křížek, Marek (referee)
Recent morphologic development of channel and floodplain of Jelení potok brook (left side tributary of the Opava river) was analyzed in thesis. Anthropogenic-modified channel (more than 80% of total channel length) is distinctively altered by erosional flood-induced landforms (bank failures, flood channels) that were predominantly created during flood in 1997. Some landforms, however, emerged during precedent flood events (1995, 1996). This fact was confirmed by dendrochronological research. An analysis of exposures of alluvial sediments shows higher dynamics of channel shifts in the past, followed by period of fine-grained sediment accumulation. Dating of charcoal deposed in flood-loams (depth 59 cm, age 820±30BP) enables to estimate dynamics of floodplain accrecion. The beginning of floodloams deposition is thus dated to medieval ages. An analysis of landscape cover changes between 1840 - 2002 shows that current forest area (58%) and permanent grasslands (18%) are achieving its maximum extent during last 160 years. On the other side, the extent of arable land (19%) has gradually falled to current miminum area. In long-term period, this fact could lead to channel incision. Powered by TCPDF (www.tcpdf.org)
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Comparation of frost hummocks in the Hrubý Jeseník Mts. and Iceland.
Vejrostová, Monika ; Křížek, Marek (advisor) ; Treml, Václav (referee)
This paper is focused on comparation of frost hummocks in the Hrubý Jeseník Mts. and in the Mosfellsheiði area in Iceland in terms of their external and internal characteristics as well as their thermal characteristics. Field work in Mosfellsheiði provided height, length, and width data of more than 120 frost hummocks which were analyzed and compared to frost hummocks in Keprník and Tabulové skály location in the Hrubý Jeseník Mts. Soil samples from frost hummocks were taken to determine frost susceptibility of soils. Based on ground temperature measurements at depth of 15 and 30 cm in the frost hummocks in Iceland and the Hrubý Jeseník Mts., freeze-thaw cycles were investigated. The results show that frost hummocks in the Hrubý Jeseník Mts. are larger but less domed-shaped than those in Mosfellsheiði. Further, soils in frost hummocks are frost susceptible. The highest numbers of freeze-thaw cycles were identified in Iceland. It was also found out that freeze-thaw processes occurred in the frost hummocks in Tabulové skály but in Keprník location were very few freeze-thaw cycles observed. Short term freeze-thaw cycles at the end of regelation seasons mostly show diurnial frequency. At the 30 cm depths only one or two regelations were observed during a single season. Powered by TCPDF (www.tcpdf.org)
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