Faktory ovlivňující zpětnovazebné interakce mezi rostlinami a půdou a jejich význam v rostlinných invazích

Hanzelková, Věra

Invasive species significantly affect plant communities and entire ecosystems in invaded areas. Understanding the mechanisms by which these species affect their environment and promote their own growth is crucial for explaining their advantage over non-invasive species. One potential mechanism is plant-soil feedback (PSF). In PSF, plants first modify the abiotic soil properties of the soil (e.g., depleting nutrients, releasing root exudates, or altering soil acidity), as well as the biotic properties (e.g., influencing soil fungi or bacteria which may act as symbionts, decomposers, or pathogens). These modifications, in turn, affect plant growth, either positively or negatively. PSF can be intraspecific and interspecific, and this thesis focuses on the intraspecific PSF. Most plant species show negative intraspecific PSF, which promotes coexistence in a community by limiting their own growth. However, invasive and dominant native species can show positive or less negative PSF, making PSF a potential explanation for their invasion success. The way plants affect the soil is influenced by plant phylogeny, as closely related species tend to have more similar plant-soil interactions. Furthermore, plants with similar abundance show similar PSF, with dominant species often showing positive PSF and rare...

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