What impact do invasive insect species have on local ecosystems?

Invasive insect species can significantly disrupt the ecological balance within local ecosystems. When these species are introduced to an area where they do not naturally occur, they often outcompete native species for resources such as food, habitat, and breeding sites. This competition can lead to a decline or even extinction of native species, which diminishes biodiversity and alters the structure of the ecosystem.

Invasive insects can also introduce diseases and parasites that may affect native species and disrupt existing predator-prey relationships. As these invasive species thrive and spread, they can create additional management challenges for both conservation efforts and agricultural practices. Effective management becomes necessary to control their populations and mitigate their impact on the environment.

In contrast, the other options suggest that invasive insects enhance ecosystem health or have no significant impact, which overlooks the extensive evidence showing the detrimental effects of invasives on biodiversity and ecosystem functioning. Furthermore, claiming that invasive species only affect agricultural crops without influencing the broader ecosystem fails to recognize their potential to cause widespread ecological changes.