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Ombrotrophy and minerotrophy of acidic wetlands - ecological and environmental indicators
Hanousková, Andrea ; Neustupa, Jiří (advisor) ; Šťastný, Jan (referee)
In this thesis I focus on different aspects of two basic types of peatlands - ombrotrophic bogs and minerotrophic fens, that differ in the source of their water supplies. In case of the bogs, all the moisture comes from precipitation, the fens are in varying degrees supplied with water from the mineral soil and bedrock. This concept is based on the assumption that hydrological conditions are essential for other properties of acidic wetlands, especially for vegetation, which is still the subject of discussion. Therefore I mention different gradients of peatlands (pH, nutrients and minerals) and important processes (succession, accumulation of peat) with regard to their relation to minerotrophy and ombrotrophy and I discuss their importance for the entire ecosystem. In the second part of my thesis, I focus on the algal assemblages in peatlands, which despite its immense diversity often form a neglected component of these ecosystems. The structure of algal communities vary in space and time under the influence of various factors, including, among others, ombrotrophy and minerotrophy. Powered by TCPDF (www.tcpdf.org)
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What are the effects of ombro-minerotrophic transition in Central European peatlands on structure and dynamics of microalgal communities?
Hanousková, Andrea ; Neustupa, Jiří (advisor) ; Pusztai, Martin (referee)
Peatlands, as primary boreal habitats, are very rare and valuable azonal ecosystems in the Central European landscape. Their value is due, among others, to the enormous abundance of microalgae communities, of which probably the most prominent group consists of desmidiales, both in the richness of species and in their proportional representation. An important factor that affects peatland biota is the ombro-minerotrophy gradient derived from the hydrological regime. According to this concept, peat bogs are divided into two basic types - ombrotrophic peat bogs, which are saturated only by rainwater and minerotrophic fens, which are enriched by groundwater or surface water. The desmids, characterized by high sensitivity to environmental factors and species richness, are a very useful model group for ecological studies. In my work I deal with the effect of the ombro-minerotrophic gradient on the structure, diversity and dynamics of desmid communities on Sudeten peat bogs. The results show that ombro-minerotrophy significantly affects the structure of communities and is more determinant for the occurrence of individual species than their abundance. Significant effect was also found in species diversity. Minerotrophic peat bogs have apparently higher species diversity, which is mainly determined by the...
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Ombrotrophy and minerotrophy of acidic wetlands - ecological and environmental indicators
Hanousková, Andrea ; Neustupa, Jiří (advisor) ; Šťastný, Jan (referee)
In this thesis I focus on different aspects of two basic types of peatlands - ombrotrophic bogs and minerotrophic fens, that differ in the source of their water supplies. In case of the bogs, all the moisture comes from precipitation, the fens are in varying degrees supplied with water from the mineral soil and bedrock. This concept is based on the assumption that hydrological conditions are essential for other properties of acidic wetlands, especially for vegetation, which is still the subject of discussion. Therefore I mention different gradients of peatlands (pH, nutrients and minerals) and important processes (succession, accumulation of peat) with regard to their relation to minerotrophy and ombrotrophy and I discuss their importance for the entire ecosystem. In the second part of my thesis, I focus on the algal assemblages in peatlands, which despite its immense diversity often form a neglected component of these ecosystems. The structure of algal communities vary in space and time under the influence of various factors, including, among others, ombrotrophy and minerotrophy. Powered by TCPDF (www.tcpdf.org)
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