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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
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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Telemetrie hmyzu se zaměřením na tesaříka obrovského (\kur{Cerambyx cerdo})
 PĚNKA, Tomáš
In this thesis, I studied the dispersal patterns of the Great Capricorn beetle Cerambyx cerdo (Coleoptera: Carambycidae), an endangered veteran tree specialist. Using the modern method of radio-tracking I determined the movement probability and dispersal capacity of C. cerdo individuals during 14 days period at two sites in Slovakia. I also assessed the differences in movement distances between the males and females and between the two studied sites. Finally, I presented other telemetry techniques, which are frequently used to track different insect species.
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