What is a common ecological issue associated with invasive species?

Invasive species are organisms that are introduced into a new environment where they are not native, and they typically have detrimental effects on local ecosystems. One of the most significant ecological issues associated with invasive species is their potential to lead to the extinction of native populations. This occurs because invasive species often outcompete native species for resources such as food, space, and light. They may also introduce diseases to which native species have no resistance or may alter habitats in ways that native species cannot adapt to.

The introduction of an invasive species can disrupt food webs and lead to a decline in population sizes of native species, sometimes resulting in their complete extinction. This can have cascading effects on the ecosystem, as native species often play crucial roles in maintaining ecological balance. Thus, the correct answer highlights a serious consequence of invasive species entering and establishing themselves in new ecosystems.