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Influence of understory light on diversity and composition of forest vegetation in the České Středohoří Mts.
Macek, Martin ; Kopecký, Martin (advisor) ; Černý, Tomáš (referee)
Light is essential component of forest ecosystem, as limited light availability in forest-floor restricts herb and tree seedlings growth. Importance of light availability for maintaining plant species diversity and community structure wasn't sufficiently evaluated in the Czech Republic. This study focus on the ecological relevance of light availability on both landscape and local scale. Relationship of light to cover, diversity and species composition was quantified in the thesis. Dominant tree species affected light availability and its spatial variability. Light availability was along the soil reaction and slope most influential factor for large-scale species diversity. Within-site light variability affected plant diversity more than soil reaction variability. Measuring light by means of hemispherical photography seems to be an appropriate for studies like this. Light availability influnence on community compostition is weak in comparison with other environmental gradients.
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Influence of understory light on diversity and composition of forest vegetation in the České Středohoří Mts.
Macek, Martin ; Kopecký, Martin (advisor) ; Černý, Tomáš (referee)
Light is essential component of forest ecosystem, as limited light availability in forest-floor restricts herb and tree seedlings growth. Importance of light availability for maintaining plant species diversity and community structure wasn't sufficiently evaluated in the Czech Republic. This study focus on the ecological relevance of light availability on both landscape and local scale. Relationship of light to cover, diversity and species composition was quantified in the thesis. Dominant tree species affected light availability and its spatial variability. Light availability was along the soil reaction and slope most influential factor for large-scale species diversity. Within-site light variability affected plant diversity more than soil reaction variability. Measuring light by means of hemispherical photography seems to be an appropriate for studies like this. Light availability influnence on community compostition is weak in comparison with other environmental gradients.
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The analysis of foreign trade with wood from selected biomes of the Earth
Zatloukal, Marek
The object of this diploma thesis is evaluation trends of chosen countries between the years 1990 -- 2010 in division of production, import and export. The next part is description of the year 2010, determination of the main producers, importers, exporters and most significant flows of the industrial roundwoood between countries, regions and continents. The following point is taken into consider other factors like a forest area and population of individual country. These factors strongly influence production, import and export of each country. There were also mentioned the significant benefits and problems of Czech Republic, because of production, import, export and geographical position. Each of the result was presented by graphs and thematic maps. The diploma thesis is based on the statistical information from databases of Food and Agriculture Organization of the United Nations (FAO). These information were evaluated by FAO and estimated like official data about selected countries.
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