Ye Xiaoqi, Gu Chunfeng, Meng Jinliu, Wu Ming
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
National Research Station of Hangzhou Bay Wetlands Ecosystem, Hangzhou 311400, China.
Plants (Basel). 2025 Aug 25;14(17):2640. doi: 10.3390/plants14172640.
Exotic invasive plant species can cause biodiversity loss by outcompeting and replacing native species. Herbicides are commonly used to control invasive plants owing to their low cost and high efficiency. However, herbicide use can have unintended effects on co-occurring native plant species by altering the competitive balance. We studied how herbicide application modifies the competition between an invasive and a native species. We examined the effects of applying glyphosate on the mortality, photosynthetic capacity, and growth of , an aggressive invasive species, and , a native species that commonly co-occurs with . We also studied how applying glyphosate affected the competition between these species. Various glyphosate concentrations were applied to the two species grown either together or separately. The mortality rate increased while the photosynthetic capacity and growth decreased with increasing glyphosate concentration. Increasing the glyphosate concentration more negatively affected the parameters of than those of . Plant growth, especially that of was more restricted by intraspecific competition than by interspecific competition as the glyphosate concentration increased. Furthermore, the relative competitive potential of the native species decreased with increasing glyphosate concentration. is more tolerant of glyphosate, which enhances its competitive advantage and hinders the proliferation, reintroduction, and success of native plant species. Future studies should focus on developing techniques to mitigate the negative impacts of invasive plant species, for example, via optimizing methods of spraying herbicides.
外来入侵植物物种可能会通过竞争超过并取代本地物种而导致生物多样性丧失。除草剂因其低成本和高效率而常用于控制入侵植物。然而，使用除草剂可能会通过改变竞争平衡对同时存在的本地植物物种产生意想不到的影响。我们研究了除草剂的施用如何改变一种入侵物种和一种本地物种之间的竞争。我们研究了施用草甘膦对一种 aggressive 入侵物种以及一种通常与其共生的本地物种的死亡率、光合能力和生长的影响。我们还研究了施用草甘膦如何影响这些物种之间的竞争。将各种草甘膦浓度施用于一起种植或单独种植的这两个物种。随着草甘膦浓度的增加，死亡率上升，光合能力和生长下降。草甘膦浓度的增加对 [物种名称1] 参数的负面影响比对 [物种名称2] 的更大。随着草甘膦浓度的增加，植物生长，尤其是 [物种名称1] 的生长，受种内竞争的限制比种间竞争更大。此外，本地物种的相对竞争潜力随着草甘膦浓度的增加而降低。[物种名称1] 对草甘膦更具耐受性，这增强了其竞争优势，并阻碍了本地植物物种的增殖、重新引入和成功生长。未来的研究应侧重于开发减轻入侵植物物种负面影响的技术，例如，通过优化除草剂喷洒方法。
