Invasiivis

Invasiivis is an adjective used in several languages to describe something that invades or spreads beyond its place of origin. The term derives from the Latin invādere, to enter by force, and appears in scientific and everyday usage to indicate a strong, often unwelcome, capacity to expand its presence. In many languages the equivalent word is used in biology, ecology, medicine, and agriculture.

In ecology and biology, an invasive (invasiivis) species is a non-native organism that establishes itself in a new environment, spreads, and causes harm to native species, ecosystems, or human interests. Invasive species can outcompete local organisms, alter habitats, and introduce diseases. Examples include the zebra mussel in the Great Lakes, the Asian longhorned beetle in North America, and kudzu in parts of the United States.

In medicine, invasive describes procedures or processes that penetrate body tissues. Invasive procedures may require incisions, insertion of instruments, or removal of tissue; this is contrasted with non-invasive methods, which do not break the skin or mucous membranes, such as ultrasound or MRI imaging. In oncology, invasive cancer cells invade surrounding tissues and spread (metastasize), whereas non-invasive tumors remain localized (carcinoma in situ).

In agriculture and horticulture, invasive plants or pests can threaten crops and natural flora, leading to management strategies: prevention, early detection, mechanical removal, chemical control, and sometimes biological control.