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Změny krajinného krytu na území Národního parku Podyjí
PĚNKA, Tomáš
In this diploma thesis, I studied land use and land cover changes in the territory of Podyjí National Park during a period of almost 80 years. The background data were obtained from black-and-white aerial pictures from 1952, 1974 and 1989 further supplemented by two vectorized layers from 1938 and 2014. The main trends in the studied areas were a substantial growth of forest areas, decrease of permanent grasslands, and the agricultural areas. Analyses using landscape metrics showed that closed forest cover increased from 66% to 75% between 1952, 1974 and 1989. Moreover, during the same time period the area of open woodlands decreased by 3% (from 10% to 7%). The obtained results also indicated the gradual homogenization of the landscape, with changes in forest management having the greatest impact. Such trend might be dangerous especially for rare species associated with open forest habitats.
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Reptile assemblages along succession gradient in oak forests of Podyji National Park
BALOUN, Jaroslav
This thesis focuses on the effects of succession on forest clearings on reptile assemblages in Podyjí National Park. The topic and results presented here follow up my bachelor thesis evaluating habitat preference of reptiles in Podyjí National Park and their assemblages on experimental clearings in the core zone of NP Podyjí. The reptile monitoring was conducted on the clearings and nearby control habitats using a method of artifical shelters and method of transect walks. Abundance of reptile species on clearings, and effect of gradual succession on the clearings on individual reptile species was studied and evaluated. While the creation of clearings clearly benefited most termophilous reptile species, including e.g. the Green lizard (Lacerta viridis) and the Aesculapian snake (Zamenis longissimus), the effect of succession is more difficult to assess owing to rather high variation among years. Only the L. viridis significantly derceased with the course of succession, while the Slow worm (Anguis fragilis) benefited from it.
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Tourist interest in illicit zone of ice caves
Nováková, Eva ; Kuda, František ; Kubalíková, Lucie
Ledové sluje (Ice Caves) in the Podyjí National Park represents one of the most spectacular sites within the area. It consists of the large boulder field and several pseudokarst caverns on the north-western slope of the ridge that are very important from the ecological and geomorphological point of view. The access to the site is restricted for the visitors of National Park as there exists a risk of damage and disturbance of these unique phenomena, tourist can use the marked paths leading around the site, they can reach the top part of the ridge. Currently, there are only several persons who have legal access to the site (employees of the National Park Administration and other researches with the permission issued by NP Administration). However, the installed sensor that counts the passages proved that the site is visited more frequently than it should be. The number of people who visit this site (situated within the first zone of National Park where there is no marked path and so the access is forbidden by decree) is quite alarming. Based on these findings, some proposals for the solution of this unfavourable situation are proposed and other possibilities how to avoid this undesirable phenomenon are discussed.\n
Fulltext: content.csg -  PDF
Plný tet: UGN_0490270 - PDF
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Effect of disturbances on reptile and amphibian assemblages in oak forests of Podyji National Park
BALOUN, Jaroslav
The thesis focuses on the monitoring of reptiles and amphibians of different habitats in six sampling areas in the Podyjí National Park. The monitoring was conducted by the method visually searching for reptiles along walking transect and by using black pond foils as artificial hiding places from 2012 to 2015. The thesis evaluates habitat preferences of reptile species common in the area. The most preferred were partially open habitats, such as the forest edge and open sparse oak forest. The least preferred habitat was shady, closed-canopy forest. The results demonstrate the positive effect of distrubances on most reptile species in the oak forests of Podyjí NP. Habitats suitable for numerous endangered species, including many reptiles, decline due to gradual overgrowing of sparse oak forests and woodlands. The results of this thesis highlight the importance of active conservation forest management to protect the presence of open woodlands and sparse forests.
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Relief types as a basis for landscape of the Podyjí National Park
Kirchner, Karel ; Havlíček, M. ; Kuda, František
Canyon-like valley of the Dyje River with a number of incised meanders forms the state boundary between Austria and the Czech Republic. Valley of the Dyje River is a main geomorphological phenomenon and the axis of the Podyjí National Park, which was declared in 1991. Geomorphological research began to develop after the declaration of the Podyjí National Park, but so far has not been elaborated map of the relief types. This paper is the first attempt to create a map of relief types of the studied area. Three basic relief types have been defined in the study area: i) Polygenetic erosional-denudational regional planation surface, ii) Fluvial erosional-denudational slopes of the canyon-like valley of the Dyje River and its tributaries, iii) Polygenetic marginal slope of Bohemian Highland. Within these main types, 9 subtypes have been defined. Canyon-like valley of the Dyje River with a number of incised meanders forms the state boundary between Austria and the Czech Republic. Valley of the Dyje River is a main geomorphological phenomenon and the axis of the Podyjí National Park, which was declared in 1991.
Fulltext: content.csg - PDF
Plný tet: UGN_0437755 - PDF
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Ice caves (Podyjí National Park)
Demek, J. ; Hubatka, F. ; Kirchner, Karel ; Kuda, F.
Excursion guide deals with the unique site – Ice caves in the western part of the Podyjí National Park. Unloading of bedrock after incision of the Dyje/Thaya R. (and maybe an earthquake) caused rockslides, opening of fissures and formation of several hundred of meters long and tens of meters deep pseudokarst caves. Due to special microclimatic conditions cave ice remains in pseudokarst caves up to August. Quantitative measurements of gravitational movements are carried out in caves and in block fields.
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Recent allophane coatings from the karst and pseudokarst caves
Melka, Karel ; Cílek, Václav
Allophane is not often present in karst caves. As example of its occurence the Aragonite Cave near Ochtiná (Slovakia) can be set out. It was found there in an asbolane profile forming white earthy intercalations or is present in asbolane Mn ochre positions as the admixture. Allophane often occurs as coatings on the walls of abandoned ore mines. It can be also found in pseudokarst ice caves of the Podyjí National Park (the Ledové sluje Caves) in Moravia. The local aggregates form microcascades and flowstone-like structures in which allophane layers alternate with dark brown Al-Fe phosphates, sometimes with BaSo4 enriched laminate. Allophanes of these two localities were recognised by means of laboratory methods, especially electron microprobe analysis, X-ray powder diffraction and thermal analysis.
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