Human activities have facilitated the introduction of invasive plants worldwide, altering habitat structure and leading to substantial effects on biodiversity. However, the effects of plant invasions on herbivore communities are understudied. Here, we examine factors influencing the occurrence of herbivores in ten coastal sites invaded by Carpobrotus edulis in the northwestern Iberian Peninsula. The aims were to evaluate the distribution and abundance of herbivorous invertebrates in different communities (invaded vs. non-invaded), explore the structure of plant–herbivore interaction networks, and assess whether the presence of herbivores affects the performance and fitness of C. edulis. Our results show that herbivore species composition was altered by the presence of C. edulis. Non-invaded plots had a higher number of plant–herbivore interactions and more specialized herbivore species, resulting in a greater degree of specialization. We also found an increase in the number of damaged flowers (florivory) of C. edulis by the native snails Theba pisana and Cornu aspersum. We conclude that C. edulis alters herbivore communities compared with non-invaded plots by changing plant–herbivore interactions and increasing the abundance of herbivores in invaded coastal sites. Snails might reduce seed production of C. edulis, acting as a natural biological control agent. Understanding the impacts of introduced species over invertebrate species at different community levels is crucial for implementing long-term management strategies that are key to reducing the impact of C. edulis on biodiversity.

人类活动促进了世界范围内入侵植物的引进，改变了栖息地的结构并导致了对生物多样性的重大影响。但是，植物入侵对草食动物群落的影响尚未得到研究。在这里，我们研究了影响伊比利亚半岛西北部的食肉Carbobrotus入侵的十个沿海地区草食动物发生的因素。目的是评估草食性无脊椎动物在不同群落中的分布和丰富度（入侵与非入侵），探索植物-草食动物相互作用网络的结构，并评估草食动物的存在是否会影响可食蓝藻的性能和适宜性。。我们的结果表明，食草动物的种类组成因C.贻贝。非入侵地块的植物与草食动物之间的相互作用数量更多，而食草动物种类也更加特殊，因此其专业化程度更高。我们还发现了一个增加的损坏花（florivory）的数量C.毛竹由本地蜗牛白色意大利蜗牛和大角aspersum。我们的结论是C.牛肝菌变造草食社区提供非侵入地块通过改变植物-食草动物互动和增加草食动物的丰度侵入沿海的网站相比。蜗牛可能会降低种子生产C.果，作为天然生物防治剂。了解引入的物种对无脊椎动物物种在不同社区级别的影响，对于实施长期管理策略至关重要，而长期管理策略对于减少可食蓝藻对生物多样性的影响至关重要。