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Grassland restoration in abandoned quarries by sowing seed mixtures
Strušková, Eliška ; Kuťáková, Eliška (advisor) ; Knappová, Jana (referee)
There are many former or still active quarries in the Czech Republic that had disrupted the natural landscape. Under certain conditions, species-rich herbaceous communities can develop in abandoned quarries and these can also serve as a refuge for species that slowly disappear from our landscape due to human activity. In order to create suitable conditions for establishing valuable habitats, it is necessary to choose thoroughly the method of recultivation. Since abandoned quarries are frequently isolated from natural seed resources, sowing of regional mixtures is one of possibilities of recultivation. This bachelor thesis deals with all the steps of this method of recultivation, from the importance of seed origin and their composition in a mixture, through the method of seed collection, methods of sowing, to the combination of seed sowing with the other approaches supporting recultivaton. Keywords: recultivation, abandonded quarries, ecological restoration, seed sowing, semi-natural vegetation
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Approaches to abandoned quarry reclamation
Müller, Tomáš ; Kuťáková, Eliška (advisor) ; Veselý, Adam (referee)
The disruption of open landscape goes in hand with mining operations. Continuous growth of such disturbed areas, both in numbers and coverage, puts ever increasing pressure on attempts of their reintegration back to the landscape. Different methods and approaches that allow this exist, commonly related to as reclamation. The two main ones are technical reclamation and ecological restoration. This thesis will: 1) introduce individual steps required to be taken in an abandoned quarry in order, to achieve previously defined goals, 2) compare individual methods that are in use today, and 3) explore the potential of abandoned quarries in the context of open landscape. Keywords: reclamation, abandoned quarries, limestone, restoration ecology, succession
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Primary Succession - study methods and pollen analysis opportunities
Suk, Pavel ; Abraham, Vojtěch (advisor) ; Prach, Jindřich (referee)
This thesis focuses on the main study methods of primary succession. It compares their advantages and disadvantages, the scales of usage and the outputs they bring. Due to the duration of a succession development (in hundreds of years), indirect approach - space-for- time substitution using chronosequences (sites that differ only in age and make up succession series) is often used instead of direct study methods. Breach of the the critical assumption that all sites follow the same trajectory may lead to false conclusions about the successional development. This thesis presents examples showing this problem, ways to prevent it and offers an alternative method - pollen analysis. Pollen analysis is on average used for larger spatial and temporal scales but partially overlaps scales of space-for-time substitution. The thesis presents biases of pollen analysis and ways how to solve/limit them and introduces abandoned, partially flooded quarries as a suitable environment for the use of this method to study succession inferred from rapidly growing limnic sediment.
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