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Summer fluxes of nitrous oxide from boreal forest
Macháčová, Kateřina ; Pihlatie, M. ; Halmeenmäki, E. ; Pavelka, Marian ; Dušek, Jiří ; Bäck, J. ; Urban, Otmar
Boreal forests cover almost one-third of the global forest area, and results of soil measurements show them to be a natural source of the important greenhouse gas nitrous oxide (N2O). Nevertheless, N2O fluxes from boreal tree species have been excluded from calculations of N2O exchanges from forest ecosystems. Therefore, our objective was to quantify and scale up the N2O fluxes from stems of mature silver birch (Betula pendula), Scots pine (Pinus sylvestris), and Norway spruce (Picea abies), as well as from the forest floor of a boreal forest in Finland during June and July 2014. This study shows that boreal tree species emit N2O from their stems under natural field conditions and significantly contribute up to 8% of forest floor fluxes of N2O. Spruce trees seem to be the strongest N2O emitter among the studied tree species. Moreover, the N2O flux rates from both coniferous tree species increased with decreasing soil water content. This study highlights the necessity to include N2O fluxes from trees within the total greenhouse gas budget of forest ecosystems.
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The History and Present of Greenery Accompanying Road Network
DUŠEK, Jiří
This thesis focuses on the accompanying greenery of road network in general and on its historical development. Accompanying greenery of road network is mainly represented by alleys and avenues. Several important functions of the accompanying greenery of road network are discussed in this thesis. These functions have a positive impact on the ecological stability of the landscape and they also improve safety on the roads for drivers. This thesis also discusses species of plants and trees used in various altitudinal zones. Next chapter is focused on the historical development of the accompanying greenery during historical periods. Nowadays planting and maintenance of the accompanying greenery is realized by relevant rules. The Land Adjustment has considerable impact on planting and maintenance of the accompanying greenery of road network.
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Omezování emisí znečišťujících látek do ovzduší: Upřesnění emisních faktorů pro prioritní znečišťující látky
KONEKO marketing s.r.o., Praha ; VÚZT, Praha ; CDV, Brno ; TESO, Praha ; Český hydrometeorologický ústav, Praha ; Neužil, Vladimír ; Jelínek, Antonín ; Dušek, Jiří ; Adamec, Vladimír ; Velíšek, Jan ; Bureš, Vladimír ; Hnilicová, Jitka ; Machálek, Pavel
V roce 2004 byly řešeny tyto úkoly: 1. Identifikace rozhodujících zdrojů emisí (emise těžkých kovů a persistentních organických látek, emise tuhých znečišťujících látek, emise amoniaku); 2. Měření emisí vybraných skupin zdrojů (podklady pro výběr zdrojů, návrh dokumentace pro zadání veřejné zakázky).
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Clubs activity in Chrudim area release from federal law and 1949
DUŠEK, Jiří
This work deals with the activities of the clubs Chrudim area issue of club law in 1867 until the creation of the National Front in 1949. In this thesis is described historie of clubs law, the history of Chrudim, Chrudim area, selected historical sites (Chrast Heřmanův Městec and Glinsko). From these historical sites were chosen few clubs Divadelní spolek Tyl Chrast, Kroužek mládenců a dívek Chrast, Kroužek divadelních ochotníků Chrast, Studentský spolek Rudolf Pokorný Heřmanův Městec a Dělnická jednota Hlinsko.
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Factors of regional growth and development
DUŠEK, Jiří
The submitted doctoral thesis deals with an analysis of inter-municipality cooperation in the South Bohemian Region. The main objective of the thesis is to assess the importance of inter-municipal cooperation in the South Bohemian Region and to assess its impact on economic growth and development of individual towns, municipalities and the whole South Bohemian Region using an originally created database of cooperation of towns and municipalities in the South Bohemian Region after the year 1989. First, the author has dealt in depth with a description of the South Bohemian Region and its major administrative districts from the point of view of physical and geographical features, as well as from the point of view of administrative, socioeconomic and demographic factors. Subsequently, a detailed descriptive statistics of the intensity of cooperation in the South Bohemian Region was presented, as well as a statistical analysis using correlation and regression analysis, analysis of variance, analysis of covariance and cluster analysis. In the last chapter, the current situation and problems regarding cooperation of municipalities in the South Bohemian Region were outlined.
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Ecosystem services of a floodplain
Pithart, David ; Křováková, Kateřina ; Dušek, Jiří ; Žaloudík, Jiří
Natural segments of river floodplains have preserved the ability to provide a scale of ecosystem services. The aim of this study is to evaluate in a monetary way the selected ecosystem services of a natural segment of river Lužnice floodplain, Czech republic, based on the analysis and quantification of ecosystem processes and structures. Evaluated services are flood protection, carbon sequestration, biodiversity refugium and production of hay, wood and fish.
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