Impact of Invasive Plant Species on Soil Properties and Nematode Communities: Ecological Consequences and Biotic Interactions

Abstract Invasive plant species can significantly alter soil ecosystems, affecting biodiversity, nutrient cycling, and ecological balance. This study investigates the effects of Fallopia japonica and Solidago gigantea on soil nematode communities in riverbank and permanent grassland ecosystems across different geomorphological regions. It explores how these invasions affect soil properties and nematode community structures, with an experimental study testing the effects of organic matter from these two invasive plant species on soil health. The findings indicate that F. japonica in riparian ecosystems increased soil pH, reduced nematode abundance, especially among plant-parasitic nematodes. In the grassland, S. gigantea increased soil pH and bacterivore and fungivore populations while negatively affecting soil maturity and functional indices. Experimental trials demonstrated that organic matter from both invasive plants reduced nematode diversity and influenced soil moisture and pH. The study emphasises the need for effective environmental management strategies to mitigate the ecological impacts of invasive plant species on soil ecosystems. Information © The Authors 2025