Ma Ruixiang, Liang Jili, Zuo Keyi, Wu Ming, Ye Xiaoqi
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
State Key Laboratory of Wetland Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China.
Plants (Basel). 2025 Sep 8;14(17):2806. doi: 10.3390/plants14172806.
Rising biological invasions continue to threaten biodiversity conservation worldwide. To protect native ecosystems and biodiversity, improve resilience against invasions, and lower ecological management costs, it is crucial to identify native plant species that can endure the competitive pressures from invasive plants. This greenhouse study examined the competition between and 32 native plant species to identify key functional traits of these native plant species that influence their competitive effects on and responses to . The results indicated that seedlings were unable to suppress the growth of most of the native species studied, while most native species could significantly suppress growth of , reducing its biomass by 12-92%. The suppression effects by native plants were closely related to their root functional traits. Specifically, annuals with higher root-shoot ratio, specific root lengths, stem biomass, plant height by day 10, and smaller number of root tips showed stronger inhibition of . On the other hand, perennials with smaller average root diameter, or greater root biomass and plant heights by day 60, were also more inhibitory towards . This study concluded that the competitive effect of seedlings of have weaker competitive impacts compared to most the studied native plants. Root traits are essential in the competition between native plants and , potentially aiding in the identification of native plant species with high resistance to invasion.
日益增加的生物入侵继续威胁着全球的生物多样性保护。为了保护本地生态系统和生物多样性，提高抵御入侵的恢复力，并降低生态管理成本，识别能够承受外来入侵植物竞争压力的本地植物物种至关重要。这项温室研究考察了[外来入侵植物名称]与32种本地植物物种之间的竞争，以确定这些本地植物物种影响其对[外来入侵植物名称]竞争效应和响应的关键功能性状。结果表明，[外来入侵植物名称]幼苗无法抑制大多数所研究本地物种的生长，而大多数本地物种能够显著抑制[外来入侵植物名称]的生长，使其生物量减少12%至92%。本地植物的抑制作用与其根系功能性状密切相关。具体而言，根冠比更高、比根长、茎生物量、第10天的株高以及根尖数量较少的一年生植物对[外来入侵植物名称]的抑制作用更强。另一方面，平均根直径较小、或第60天根生物量和株高更大的多年生植物对[外来入侵植物名称]的抑制作用也更强。本研究得出结论，与大多数所研究的本地植物相比，[外来入侵植物名称]幼苗的竞争效应较弱。根系性状在本地植物与[外来入侵植物名称]的竞争中至关重要，可能有助于识别对入侵具有高抗性的本地植物物种。
