Which of the following is an ecosystem service?
A. Air pollution
B. Power plants
C. Soil erosion
D. Timber
The Correct Answer and Explanation is:
The correct answer is D. Timber.
Explanation
Ecosystem services refer to the many benefits that natural ecosystems provide to humans, which can support health, economic activity, and overall well-being. These services are typically classified into four categories: provisioning, regulating, supporting, and cultural services. Timber falls under the provisioning services category, which includes resources that ecosystems produce and that humans use directly, such as food, water, minerals, and raw materials like timber.
Forests, which provide timber, are essential for many reasons. Timber serves as a raw material for various industries, including construction, paper production, and furniture manufacturing. Harvesting timber sustainably allows societies to benefit from this renewable resource without damaging the ecosystem’s ability to continue producing it. Managed forests that allow for regrowth contribute to biodiversity, carbon sequestration, and soil health, which are also key ecosystem services.
The other options listed—air pollution, power plants, and soil erosion—do not qualify as ecosystem services. Here’s why:
- Air pollution is a negative byproduct of human activity, especially from burning fossil fuels. Instead of benefiting humans, it harms ecosystems and human health by contaminating the air, damaging plants, and disrupting ecological balance.
- Power plants are human-made structures that generate electricity, not natural processes or resources provided by ecosystems. Although some power plants (e.g., hydroelectric or solar) use renewable resources, the plant itself is not an ecosystem service.
- Soil erosion is a natural process that, if uncontrolled, can degrade land, decrease soil fertility, and harm plant and animal life. Excessive erosion is typically harmful to ecosystems rather than beneficial.
In contrast, timber is a renewable and valuable product of forest ecosystems, offering economic and environmental benefits. Sustainable timber harvesting not only provides resources for human use but also supports forest conservation, making it a prime example of an ecosystem service.