An organism that enters a new area and displaces native species is a(n) species.

An organism that enters a new area and displaces native species is known as an invasive species. Invasive species can be plants, animals, or microorganisms that, when introduced to a new habitat, thrive and reproduce, often leading to detrimental impacts on local ecosystems, including the decline of native species populations and alterations of habitat structure and function. These species typically lack natural predators in their new environment, allowing them to proliferate unchecked. Examples of invasive species include the zebra mussel in the Great Lakes and the cane toad in Australia. Their management is crucial for the conservation of biodiversity and the health of ecosystems.