How have humans negatively impacted the ecosystem of the red ant?

The negative impact of humans on the ecosystem of the red ant is best illustrated by the alteration of their natural environment with pesticides. Pesticides can disrupt the delicate balance of ecosystems, affecting not just the targeted pests but also beneficial organisms, including red ants. These chemicals can eliminate food sources, affect reproduction, and lead to declines in ant populations. Additionally, pesticides can contaminate the soil and surrounding environment, leading to broader ecological consequences.

In contrast, while overgrown pastures can lead to habitat changes, they may not directly result in the same level of immediate harm to red ants as pesticide usage. Pesticides pose a more direct and severe threat to their survival and ecological role.