Invasive species can have a significant impact on ecosystems by outcompeting native species for resources such as food, water, and habitat. This can lead to a decline in native species populations and disrupt the balance within the ecosystem. Invasive species can also alter nutrient cycling, change the physical structure of habitats, and introduce new diseases or predators that native species are not adapted to. Overall, invasive species can cause harm to biodiversity, ecosystem functions, and even economic activities that rely on healthy ecosystems.