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Biologie, rozšíření a způsoby regulace Křídlatky {Reynoutria sp.}
VRBOVÁ, Jana
In my diploma thesis I deal with an invasive species of plants of the genus knotweed, the distribution of species and the possibilities of regulation in the area of interest. The work is divided into theoretical and practical part. The theoretical part describes plant invasions, invasive species, basic characteristics and distribution of plants of the genus knotweed. Other negative impacts of plant invasions, costs of combating invasive species, methods of vegetation regulation are also mentioned. The practical part describes the actual monitoring of the area of interest, identified and measured localities, the possibility of regulating the winged vegetation in the area of interest and a comparison with the results of mapping the winged vegetation in the same area of interest, carried out in 1999.
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Phenotypic plasticity and its role in plant invasions
Hlavička, Matěj ; Herben, Tomáš (advisor) ; Skálová, Hana (referee)
Phenotypic plasticity is the ability of given genotype to produce different phenotypes as a response to environmental cues. Its capability of adaptive response draws an attention of invasion biologists. Although many studies have been performed, the true role of plasticity in an invasion process is still unclear. Comparative experiments suffer from several major constraints - insufficiency in revealing adaptive value of plastic response and uncertain linkage between plasticity and trait value. Further experiments could be focused to reaction norms of fitness instead of trait plasticity. Also, the interspecific interaction of plastic responses is definitely an underestimated mechanism and deserves far more attention than it does today. Possible implications of plant phenotypic plasticity in predicting future invasions require further reaserch.
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Phenotypic plasticity and its role in plant invasions
Hlavička, Matěj ; Herben, Tomáš (advisor) ; Skálová, Hana (referee)
Phenotypic plasticity is the ability of given genotype to produce different phenotypes as a response to environmental cues. Its capability of adaptive response draws an attention of invasion biologists. Although many studies have been performed, the true role of plasticity in an invasion process is still unclear. Comparative experiments suffer from several major constraints - insufficiency in revealing adaptive value of plastic response and uncertain linkage between plasticity and trait value. Further experiments could be focused to reaction norms of fitness instead of trait plasticity. Also, the interspecific interaction of plastic responses is definitely an underestimated mechanism and deserves far more attention than it does today. Possible implications of plant phenotypic plasticity in predicting future invasions require further reaserch.
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MONITORING OF CHOSEN NON-INDIGENOUS PLANT SPECIES IN SELECTED LOCATIONS OF THE SOUTH BOHEMIAN REGION (FOR EXAMPLE DISTRICT OF ČESKÝ KRUMLOV AND ČESKÉ BUDĚJOVICE)
KORFOVÁ, Gabriela
The main aim of this dissertation is to determine the global occurence of geografically non-indigenous plant species - Giant Hogweed (Heracleum mantegazzianum), Himalayan balsam (Impatiens glandulifera), Japanese knotweed (Reynoutria japonika), Sakhalin knotweed (Reynoutria sachalinensis) and Reynoutria x bohemika in selected locations of the South Bohemian region, for example in district of Český Krumlov and České Budějovice. The theoretical part is focused on the characteristics of selected localities where there is an occurrence of these plants and description of the above-mentioned invasive plant species and thier subsequent liquidation. The result of the dissertation (of the work) are the map´s outputs processed in the Geographic Information System, which record the global occurance of geografically non-indigenous plant species.
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