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At the area of CHKO Trebonsko are known three localities with major appearance of Coast Douglas-fir in four groups. First two groups appear in forest ground of St. Barbora. In the first group are 18 and in the second group 23 individuals. These groups appear in the forest stand no. 408 B 13 (Cisarska group) and in the forest stand no. 457 C 12a (in a fencing at Majdalena). Surveying of these groups took place in 2006 by Mrs. Balounova and Mr. Smahel.Two odd groups appear near by Stankovsky pond and they consist of 13 and 31 individuals. They appear in the forest stand no. 245 C 11 at the area of so-called {\clqq}Stankovske woods`` between Stankov and Mirochov villages, at intersection Rovenska way and the way which leads from Mirochov to Stankov. In a neighbourhood of examined vegetation occurs USES element, it is a regional importance biocenter {--} Elk{\crq}s moors reserve at Mirochov which is also declared as {\clqq}Ramsar{\crq}s area of Trebon lowland moors``.

In this study, digital maps depicting occurrence of invasive species Echinops sphaerocephalus (Asteraceae) in the Blanský les PLA (Protected Landscape Area) and surroundings were created. Localities recorded in last 208 years in the Czech Republic were listed and great globe thistle?s spreading was showed. Germination abilities and growth characteristics of seedlings were also tested. Different management interventions were realized and their effect on great globe thistle regeneration was examined.

The Master´s Diploma Thesis deals with the assessment of the recreational potential of the town of Jablonné v Podještědí. The area is divided into three types of landscape, each of which receives different protection treatment - Lužické hory Protected Landscape Area, Lembersko Landscape Conservation Area and an ordinary landscape without any protection. The theoretical part explains basic terms as well as summarises the knowledge concerning the recreation industry, recreational potential and landscape capacity and limits. The practical part defines natural, cultural-historical and perceptional features and values of the three mentioned types of landscape. One of the aims is to discover whether the public perceives these very features and values. Then the thesis assesses the recreational potential of the landscapes with different protection treatment. Lužické hory Protected Landscape Area has the highest recreational potential while an ordinary landscape without any protection features the lowest potential. The outcome is then a map concerning the recreational potential assessment. After the assessment an appropriate management for ensuring potential development without exceeding the landscape limits is recommended.