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The terminology associated with organisms that establish themselves outside of their native range is crucial for clear communication and effective management strategies. Accurate definitions facilitate the understanding of ecological processes, inform policy decisions, and guide practical conservation efforts. For instance, a ‘native species’ refers to one that historically occurs or has occurred in a particular ecosystem without human introduction, whereas an ‘introduced species’ is one moved by human activity to a location beyond its natural range. When an introduced species causes environmental or economic harm, or harm to human health, it can be classified as a particular concern.

Precisely defining terms in this field is essential because it allows for focused risk assessments and targeted intervention. A strong definitional foundation ensures that resources are appropriately allocated to prevent and control the spread of those organisms that pose the greatest threat to biodiversity, agriculture, and public health. Historically, a lack of clear, universally accepted definitions has led to miscommunication, ineffective policies, and wasted resources in managing these biological challenges. The ecological and economic impacts of these organisms can be far-reaching, affecting ecosystem services, agricultural productivity, and human well-being.

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