Invasive species have a profound impact on local ecosystems by disrupting biodiversity and the natural balance. They can outcompete native species for resources like food, space, and nutrients, often leading to the decline or extinction of native organisms. Invasive species can also introduce new diseases and alter habitat structures, which further strains local ecosystems. The resulting shifts can lead to decreased resilience and the disruption of local food webs, ultimately affecting both the environment and human activities such as fishing and agriculture.