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Biotic and abiotic components of soil in plant-soil feedback of invasive and native plant species
Drtinová, Lucie ; Münzbergová, Zuzana (advisor) ; Štajerová, Kateřina (referee)
Plant-soil feedback (PSF) is a mechanism which may contribute to the success of invasive plant species. Which of the soil components have the greatest impact on PSF? In a two-phase experiment, I observed changes in germination and growth of plants in reaction to intraspecific plant cultivation: selected plant species were grown in substrate consisting of cultivated or uncultivated soil, containing different composition and amounts of soil biota. The effect of changes in abiotic and biotic components of the soil was then assessed and compared among pairs of closely related invasive and native plant species. The main observed phenomenon was species-specificity of plant responses to changed soil conditions. The cultivation-induced changes in soil composition affected germination and biomass of the test plants positively, negatively, or were neutral, their effect differed between tested species - some of the observed species were more affected by changes in abiotic properties of the soil, some reacted to changes in soil biota composition. Nevertheless, the composition of soil biota affected germination and biomass of plants even regardless of cultivation: the presence of all biotic components of the soil had negative effect on biomass - with growing representation and amount of pathogens, fungi, micro-...
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Intraspecific plant-soil feedback as a mechanism underlying invasiveness of neophytes of the Czech Republic
Knobová, Pavlína ; Münzbergová, Zuzana (advisor) ; Štajerová, Kateřina (referee)
Intraspecific plant-soil feedback is a relationship in which plant affects the composition of the soil and such modified soil affects growth of the same plant species. This relationship and its intensity may be linked with plant dominance and invasiveness. Dominant species can alter the composition of the soil in their favor and thus show positive intraspecific plant-soil feedback. As the invasive species are commonly being dominant in their new environment, it can be expected that intraspecific positive plant-soil feedback could be an important factor allowing the invasive species to achieve their dominant position and become invasive. To test if the existence of positive intraspecific feedback could be a general mechanism underlying plant invasiveness I compared intraspecific plant-soil feedback in a group of invasive and introduced, but non-invasive, plants in the Czech Republic. I did this using a preselected set of 34 species - 17 invasive and 17 non-invasive. For realization of the project I used the method of two-phase experiment. The first phase is called soil conditioning - influencing of soil by the plant. In the second phase the same plant species are planted in conditioned soil from the first phase and in control (unconditioned) soil. Then I compared plant biomass from conditioned and...
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Biotic and abiotic components of soil in plant-soil feedback of invasive and native plant species
Drtinová, Lucie ; Münzbergová, Zuzana (advisor) ; Štajerová, Kateřina (referee)
Plant-soil feedback (PSF) is a mechanism which may contribute to the success of invasive plant species. Which of the soil components have the greatest impact on PSF? In a two-phase experiment, I observed changes in germination and growth of plants in reaction to intraspecific plant cultivation: selected plant species were grown in substrate consisting of cultivated or uncultivated soil, containing different composition and amounts of soil biota. The effect of changes in abiotic and biotic components of the soil was then assessed and compared among pairs of closely related invasive and native plant species. The main observed phenomenon was species-specificity of plant responses to changed soil conditions. The cultivation-induced changes in soil composition affected germination and biomass of the test plants positively, negatively, or were neutral, their effect differed between tested species - some of the observed species were more affected by changes in abiotic properties of the soil, some reacted to changes in soil biota composition. Nevertheless, the composition of soil biota affected germination and biomass of plants even regardless of cultivation: the presence of all biotic components of the soil had negative effect on biomass - with growing representation and amount of pathogens, fungi, micro-...
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Intraspecific plant-soil feedback as a mechanism underlying invasiveness of neophytes of the Czech Republic
Knobová, Pavlína ; Münzbergová, Zuzana (advisor) ; Štajerová, Kateřina (referee)
Intraspecific plant-soil feedback is a relationship in which plant affects the composition of the soil and such modified soil affects growth of the same plant species. This relationship and its intensity may be linked with plant dominance and invasiveness. Dominant species can alter the composition of the soil in their favor and thus show positive intraspecific plant-soil feedback. As the invasive species are commonly being dominant in their new environment, it can be expected that intraspecific positive plant-soil feedback could be an important factor allowing the invasive species to achieve their dominant position and become invasive. To test if the existence of positive intraspecific feedback could be a general mechanism underlying plant invasiveness I compared intraspecific plant-soil feedback in a group of invasive and introduced, but non-invasive, plants in the Czech Republic. I did this using a preselected set of 34 species - 17 invasive and 17 non-invasive. For realization of the project I used the method of two-phase experiment. The first phase is called soil conditioning - influencing of soil by the plant. In the second phase the same plant species are planted in conditioned soil from the first phase and in control (unconditioned) soil. Then I compared plant biomass from conditioned and...
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