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Habitat selection by dragonflies - effect of littoral and riparian vegetation
Bonková, Anita ; Černý, Martin (advisor) ; Waldhauser, Martin (referee)
Dragonflies form one of the important pillars of most aquatic ecosystems and play an important role in maintaining their balance. The main goal of this bachelor's thesis is to summarize current knowledge about the habitat preferences of members of the order Odonata, with a focus on the effect of littoral and riparian vegetation, which are critical components of aquatic biotopes and significantly influence the distribution, abundance and reproductive success of dragonflies. In my work, I focus on all developmental stages, from larvae to adults. These findings are important for the maintenance and revitalization of freshwater ecosystems, in which it is necessary to pay attention to the composition of littoral and riparian vegetation to support the diverse needs of this unique insect order. Key words: habitat preference, dragonflies, Odonata, riparian vegetation, littoral vegetation
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The possibilities of using unmanned aerial systems (UAS) for monitoring littoral vegetation of water reservoirs
Vondrášek, Jan ; Bogdan, Vlastimil (advisor)
The main objective of this work is to find out what are the possibilities in the use of unmanned aerial systems (UAS) for the monitoring of littoral vegetation water habitats. The theoretical part focuses on the basic concepts related to unmanned systems, legislation in the Czech Republic to obtain permission to operate unmanned system. The theoretical part also focuses on the importance of littoral vegetation and current measurement methods littoral vegetation. The expected benefits of the use of a UAS could be e.g. assessment of the degree of land-filling the tank, quality assessment littoral vegetation, consideration of the littoral area of the container and thereby its ecological function intended action e.g. mowing etc.
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Impact of land use on the former sand-pits in the region of Veselí nad Lužnicí
NOVÁK, Ondřej
Sand-pits which were formed especially in the floodplain of the Lužnice River since the 1950s currently constitute important landscape element of the Třeboň Basin. My diploma thesis is focused on the assessment of the impact of land use on the former sand-pits in the region of Veselí nad Lužnicí. Field investigations were carried out from the beginning of June till the end of August 2008. I mapped the land use of this area by using a map key. I put down particular areas {--} agricultural areas, forest areas, water areas, bild-up areas, other areas {--} into map photographs. The total area of the mapped territory was 989 hecteres. The biggest part of the area comprises of forest growths and field-grown plants. Water areas (with the main element of the mapped area {--} a system of former sandpits) formed 23% of the total area. On the bank sof the sand-pits were placed phytosociological relevé, which illustrated littoral vegetation and environment in which this vegetation is located, and what is the influence of human activity on vegetation. I placed 74 phytosociological relevé in this system. I recorded 125 plant species {--} out of these were 104 herb plants and 21 woody species. I recorded 41 nitrophilous, 52 wetland, 16 ruderal and 2 stronngly endangered species. Altogether, 20 water samplings were carried out. Horusice I sand-pit is the richest in nutrient, the poorest in nutrients is Horusice sand-pit.
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IMPACT ASSESSMENT OF LITTORAL VEGETATION CONDITIONS OF BASIN OF VESELÍ SYSTEM ALTER GRAVEL - SAND EXTRACTION
NOVÁK, Ondřej
The sand-pits which were formed especially in the floodplain of the Lužnice River since the 1950s, curretly constitute important landscape elements of the Třeboň Basin. My bachelor thesis is focused on the assessment of the littorla vegetation of sand-pits of Veselí system. Field investigations were carried out from beginning foe July till mid-Septamber 2006 on the Veselí systém, which includes five snad-pit lakes. Seventy-four phytosociological relevés were places along the shores of all lakes in order to document the littoral vegetation as well as main environmental paramentrs and the extent of anthropogenic influence. A total of 137 plant species, of which 115 herbs and 22 trees and shrubs, were recorded on these relevés. The records included two stronngly endangered species: Lysimachia thyrsiflora and Lycopodiella inundata. The biotopes hosted 51 wetland species and 20 ruderal species.
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