What is a nonnaive species?

A nonnaive species refers to an organism that has been introduced to a new environment where it did not originally exist, often as a result of human activity. Unlike naive species, which have evolved in their habitats without exposure to certain predators, diseases, or competitors, nonnaive species can pose ecological risks by disrupting local ecosystems, outcompeting native species, or introducing new diseases. Their presence can lead to significant changes in biodiversity and ecosystem dynamics.