What does biological control refer to in the context of aquatic pest management?

Biological control in the context of aquatic pest management specifically emphasizes the introduction or enhancement of natural organisms, such as predators, parasites, or pathogens, to regulate pest populations. This approach leverages the natural ecological relationships between species to maintain pest levels below damaging thresholds, thereby reducing reliance on chemical interventions.

In aquatic ecosystems, this might involve introducing fish that feed on invasive plant species or employing microbes that target specific pests without harming native flora and fauna. This strategy is beneficial as it can lead to long-term pest population management and is often more sustainable than chemical treatments, which can have adverse effects on the ecosystem.

Other methods, such as using chemicals to eradicate pests or physically removing weeds, do not fall under biological control. These methods may provide immediate results but often come with higher risks of environmental disturbance or the resurgence of pests once the treatment is removed. Alterations to water chemistry also do not represent biological control, as this strategy focuses more on manipulating environmental conditions rather than utilizing biological mechanisms to control pest populations.