What is an invasive species?

An invasive species is defined as a non-native organism that disrupts local ecosystems. These organisms can often outcompete, prey on, or bring diseases to native species, leading to significant changes in the structure and function of the ecosystems they invade. Invasive species may thrive due to their lack of natural predators in the new environment, giving them an advantage over local flora and fauna. This can result in reduced biodiversity, altered habitats, and economic impacts.

Understanding this definition clarifies why the other options do not accurately represent an invasive species. A native organism that benefits ecosystems refers to species that belong to that particular ecosystem and contribute positively to its health and balance. An endangered species focuses on the conservation status of a species rather than its impact on local ecosystems. Finally, a species that only thrives in aquaculture pertains specifically to artificially maintained aquatic environments, which is unrelated to the broader ecological implications that invasive species have in natural settings.