National Repository of Grey Literature 7 records found  Search took 0.01 seconds. 
Post-mining lanscapes, and the dynamics and distribution of soil faunal succession
Moradi, Jabbar ; Frouz, Jan (advisor) ; Šarapatka, Bořivoj (referee) ; Seeber, Julia (referee)
Post-mining landscapes, and the dynamics and distribution of soil faunal succession M.Sc. Jabbar Moradi Abstract Soil biota play an essential role in ecosystem services provided by soil. Here we studied some of the factors affecting soil biota colonization, distribution, biodiversity and conservation values, and their impact on plants' interactions, in reclaimed and unreclaimed (spontaneous succession) post mining sites, located in the spoil heaps after coal mining near Sokolov, Czech Republic, which was summarized in four research papers. Transplant of soil blocks show that despite abundant soil fauna communities in the blocks, they migrate little into surrounding sites, which indicate that access to the disturbed surfaces does not guarantee a successful colonization in the post mining sites where a new soil profile is to be developed. Studying the heterogeneous distribution of fauna under various vegetation patches and sites, we showed that different faunal (i.e., microbial, meso, and macrofaunal) groups' distribution heterogeneity could be partly explained by different explanatory factors and using one set of factors for all the groups would not be powerful enough to create a short-list of the influential elements for each of the faunal groups. Investigating the importance of microtopography, in our...
Key factors in soil organic matter accumulation
Vindušková, Olga ; Frouz, Jan (advisor) ; Borůvka, Luboš (referee) ; Šarapatka, Bořivoj (referee)
Soil organic matter (SOM) is highly important for soil quality and the global carbon cycle. SOM content is influenced by a complex interplay of many different factors such as time, climate, parent material, vegetation, and others. The effect of time is often studied using the chronosequence approach using a set of study sites differing in age but comparable in other soil-forming factors. The effect of other factors can be studied by comparing two or more chronosequences. An important assumption of these approaches is that the SOM quantification methods produce comparable results both among sites of each sequence and among different sequences. In this thesis, I explored the key factors in SOM accumulation and dealt with SOM quantification methods. I studied SOM accumulation in two model situations - in post-mining sites after open-cast coal and oil shale mining and in landslides in the Western Carpathians. The results of this thesis are summarized in one book chapter accepted for publication and four papers, out of which three have been published and one is prepared for publication in an international journal with impact factor. The key factor affecting the rate of SOM accumulation after a major disturbance is time. The accumulation rates found in the first 40 to 100 years in both post-mining sites...
Effect of selected biophysical factors on organisms and their anthropogenic modifications
Bujalský, Luděk ; Frouz, Jan (advisor) ; Šarapatka, Bořivoj (referee) ; Moldan, Bedřich (referee)
Univerzita Karlova, Přírodovědecká fakulta Ústav pro životní prostředí Charles University, Faculty of Science Institute for Environmental Studies Doktorský studijní program: Environmentální vědy Doctoral study programme: Environmental Sciences Autoreferát disertační práce Summary of Doctoral thesis Vliv vybraných biofyzikálních faktorů na organismy a jejich antropogenní modifikace Effects of selected biophysical factors on organisms and their anthropogenic changes Mgr. Luděk Bujalský Školitel: Prof. Mgr. Ing. Jan Frouz, CSc. Supervisor: Prof. Mgr. Ing. Jan Frouz, CSc. Praha, 2019 Abstract The PhD thesis is composed of four articles dealing with biophysical factors affecting the environment of organisms occurring in anthropogenically affected ecosystems. In spite of the apparent diversity of research areas, the basic unifying idea of this work is a concept that leads from individual factors to synthesis, or more precisely, deductions leading to an understanding of local ecosystem processes, but also trying to emphasize, recently a little overlooked in basic science, the concept of a holistic point of view of the functioning of natural phenomena accentuating the importance of the basic view of the world as "interconnected networks". In particular, this viewis a demonstration of a situation where anthropogenic...
Post-mining lanscapes, and the dynamics and distribution of soil faunal succession
Moradi, Jabbar ; Frouz, Jan (advisor) ; Šarapatka, Bořivoj (referee) ; Seeber, Julia (referee)
Post-mining landscapes, and the dynamics and distribution of soil faunal succession M.Sc. Jabbar Moradi Abstract Soil biota play an essential role in ecosystem services provided by soil. Here we studied some of the factors affecting soil biota colonization, distribution, biodiversity and conservation values, and their impact on plants' interactions, in reclaimed and unreclaimed (spontaneous succession) post mining sites, located in the spoil heaps after coal mining near Sokolov, Czech Republic, which was summarized in four research papers. Transplant of soil blocks show that despite abundant soil fauna communities in the blocks, they migrate little into surrounding sites, which indicate that access to the disturbed surfaces does not guarantee a successful colonization in the post mining sites where a new soil profile is to be developed. Studying the heterogeneous distribution of fauna under various vegetation patches and sites, we showed that different faunal (i.e., microbial, meso, and macrofaunal) groups' distribution heterogeneity could be partly explained by different explanatory factors and using one set of factors for all the groups would not be powerful enough to create a short-list of the influential elements for each of the faunal groups. Investigating the importance of microtopography, in our...
Key factors in soil organic matter accumulation
Vindušková, Olga ; Frouz, Jan (advisor) ; Borůvka, Luboš (referee) ; Šarapatka, Bořivoj (referee)
Soil organic matter (SOM) is highly important for soil quality and the global carbon cycle. SOM content is influenced by a complex interplay of many different factors such as time, climate, parent material, vegetation, and others. The effect of time is often studied using the chronosequence approach using a set of study sites differing in age but comparable in other soil-forming factors. The effect of other factors can be studied by comparing two or more chronosequences. An important assumption of these approaches is that the SOM quantification methods produce comparable results both among sites of each sequence and among different sequences. In this thesis, I explored the key factors in SOM accumulation and dealt with SOM quantification methods. I studied SOM accumulation in two model situations - in post-mining sites after open-cast coal and oil shale mining and in landslides in the Western Carpathians. The results of this thesis are summarized in one book chapter accepted for publication and four papers, out of which three have been published and one is prepared for publication in an international journal with impact factor. The key factor affecting the rate of SOM accumulation after a major disturbance is time. The accumulation rates found in the first 40 to 100 years in both post-mining sites...
Effectiveness of a deposit system on one-way containers in Czech republic
Slavík, Jan ; Jílková, Jiřina (advisor) ; Hřebíček, Jiří (referee) ; Šarapatka, Bořivoj (referee) ; Hampl, Mojmír (referee)
The reasons of the contemporaly regulation in the waste management regarding the theoretical basis (on that the regulation is built) are the main objectives of this work. Because of high induced costs of the erroneous state measures built on wrong expectations in the economy and because of less effectiveness and efficiency of these measures this analysis is very important. The test of induced costs should be accomplished on the example of the deposit system on one-way containers (PET bottles and cans), which should be implemented into the public law in the Czech republic in next few years. Hardly any measure in the waste management is provoking so intensive diskussion, as the deposit system on some beverages does. What is the main reason? Especially the rise of abatement costs by subjects influenced by the deposit system and the influence on the system of separate collection. The deposit system and the separate collection are competitive systems because of the reciprocal relationship. Regarding the driving forces of the regulation the main goal of this work is the modelling of costs and benefits of the deposit system in the Czech republic and the analysis of the decision making proces of affected subjects.

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