How can mixed-species forestry affect pests and diseases?

How can mixed-species forestry affect pests and diseases?

• A. It increases their prevalence
• B. It decreases resilience to them
• C. It enhances resilience to pests and diseases
• D. It has no effect on them

Answer: (C)

Mixed-species forestry enhances resilience to pests and diseases primarily because it creates a more diverse ecosystem. When different species of trees are grown together, it disrupts the life cycles of pests and diseases that may target specific species. Pests and pathogens often thrive in monocultures, where a single species is highly susceptible to them. In contrast, a mixed-species approach can dilute the impact of any single pest or disease, as the diversity can lead to a broader range of natural defenses and resistance traits. Additionally, mixed forests may provide habitat for beneficial organisms such as predators, parasites, and microorganisms that help control pest populations. This diversity can improve overall forest health and vigor, making trees more capable of resisting or recovering from damage caused by pests and diseases. Thus, by promoting a variety of species, mixed-species forestry contributes to a more robust and resilient ecosystem.

Mixed-species forestry enhances resilience to pests and diseases primarily because it creates a more diverse ecosystem. When different species of trees are grown together, it disrupts the life cycles of pests and diseases that may target specific species. Pests and pathogens often thrive in monocultures, where a single species is highly susceptible to them. In contrast, a mixed-species approach can dilute the impact of any single pest or disease, as the diversity can lead to a broader range of natural defenses and resistance traits.

Additionally, mixed forests may provide habitat for beneficial organisms such as predators, parasites, and microorganisms that help control pest populations. This diversity can improve overall forest health and vigor, making trees more capable of resisting or recovering from damage caused by pests and diseases. Thus, by promoting a variety of species, mixed-species forestry contributes to a more robust and resilient ecosystem.