Final answer:
The brown tree snake introduction to Guam is an example of an introduced species negatively impacting native species. The snake's predation led to the extinction of several native bird and lizard species.
Step-by-step explanation:
An example of a time when an introduced species had a negative impact on native species in an area is the introduction of the brown tree snake to Guam. The brown tree snake, originally from New Guinea, was accidentally introduced to Guam after World War II. As a result, it caused the extinction or local extirpation of nine of the twelve native forest bird species and two of the eleven native lizard species on the island.
The negative impact of the brown tree snake was due to its predation on native species. The native bird species and lizards, which were not adapted to such predators, were unable to defend themselves against the tree-climbing snake, resulting in their decline. This example showcases the devastating effects that introduced species can have on native species, leading to significant ecological consequences.