Nutrient enrichment and interspecific competition modulate growth performance of invasive plant species regardless of nematodes

作者：Huifei Jin, Ayub M. O. Oduor, Lu Xiao, Shixiu Zhang, Yanjie Liu · 发表于：Journal of Plant Ecology · 年份：2025 · DOI：10.1093/jpe/rtaf060 · 被引用次数：5 · 研究领域：Nematode management and characterization studies、Agronomic Practices and Intercropping Systems、Plant Parasitism and Resistance

Abstract Invasions by non-native plant species are thought to be facilitated by factors like escape from specialized natural enemies and increased resource availability. However, the success of invasive plants also depends on interactions with native plants and soil organisms, including nematodes. Plants can experience both beneficial and harmful interactions with nematodes. Yet, research on how nematodes and nutrient levels interact to affect competition between invasive and native plants is lacking. We conducted a multi-species greenhouse experiment involving 10 invasive species and 20 native species to test the separate and combined effects of nutrient levels and nematodes on performance of individual invasive plant species, as well as their competition with native plant communities. High-nutrient conditions significantly enhanced the aboveground biomass (+119.4%), height (+26.9%), reproduction (+21.0%) and proportional aboveground biomass (+21.2%) of invasive plant species. Conversely, competition from native plant communities significantly reduced the mean aboveground biomass, height, and reproduction of the invasive species by 55.3%, 20.3% and 13.5%, respectively. For invasive plants grown without competition, the high-nutrient treatment significantly enhanced total biomass and root diameter, although it decreased the root mass fraction, independent of nematode presence. In addition, in the absence of competition, nematodes increased the specific root length of invasive...