What is a threatened species?

A threatened species is characterized by a declining population that faces specific risks which could lead to its extinction. This classification is essential in conservation biology, as it helps identify species that require monitoring and potential protective measures. Factors contributing to a species being termed "threatened" can include habitat loss, climate change, invasive species, pollution, and overexploitation. By understanding the status of threatened species, conservation efforts can be targeted to help stabilize or recover their populations.

In contrast, a species with a stable population would not be classified as threatened since it does not face immediate risks to its survival. Similarly, a non-native species refers to organisms introduced to an area where they do not naturally occur but does not inherently indicate a status of threat. Lastly, a species that is abundant in its habitat is typically regarded as secure and not at risk of becoming endangered or threatened. Thus, the defining characteristic of a threatened species is its potential vulnerability due to a declining population and associated risks.