Invasive species can have various negative impacts on native ecosystems. Some of the common impacts include outcompeting native species for resources such as food and habitat, altering the natural balance of the ecosystem, spreading diseases that native species are not resistant to, and disrupting the ecosystem's food chain and nutrient cycles. Additionally, invasive species can lead to the decline or extinction of native species, which can have cascading effects on the entire ecosystem. It is crucial to manage and control invasive species to protect the biodiversity and health of native ecosystems.