Which statement correctly defines an invasive species?

An invasive species is rightly defined as a non-native species that disrupts ecosystems. This occurs when these species are introduced to a new habitat, often by human activities, and they establish themselves in a way that can negatively affect the local flora and fauna. Invasive species can outcompete native species for resources such as food, space, and water, leading to declines in native populations and alterations in the structure of the ecosystem.

For example, invasive plants can alter soil chemistry or block sunlight needed by native plants, while invasive animals can introduce new diseases or directly prey on native species. This disruption can have cascading effects throughout the ecosystem, often reducing biodiversity and changing the dynamics of community interactions. Understanding this definition is critical for conservation efforts and managing ecosystems effectively.