Which of the following describes a negative impact of biocontrol?

A negative impact of biocontrol is best described by the potential for disrupting local ecosystems. Biocontrol involves the introduction of natural enemies, such as predators or pathogens, to manage pest populations. While this method can be effective in controlling invasive species, it can also result in unintended consequences.

When a new biocontrol agent is introduced, it may interact with native species in unforeseen ways. This interaction can lead to competition for resources, alteration of food webs, and even harm to species that were not the intended targets of control. In some cases, the introduced agent may become invasive itself, further exacerbating the ecological imbalance. Therefore, careful assessment and monitoring are essential to mitigate the risks associated with biocontrol in local ecosystems.

The other options do not accurately reflect the nature of biocontrol's negative impacts. Increased application of chemical controls may occur due to various factors but is not directly a result of biocontrol. Improved habitat for native species and enhanced water quality are typically positive outcomes and are generally not associated with negative impacts of biocontrol methods.