Living Environment Regents Practice Test

What is the primary role of controlled fires in nature preserves?

1. They promote the growth of invasive species

2. They interfere with the process of ecological succession

3. They eliminate all plant populations

4. They increase biodiversity by introducing foreign species

The correct answer is: They interfere with the process of ecological succession

The primary role of controlled fires in nature preserves is to promote the health of ecosystems and support ecological succession rather than interfere with it. Controlled burns can help manage landscapes by removing dead biomass and reducing the risk of uncontrolled wildfires. Through the process of burning, certain plant species that are fire-adapted may thrive, allowing them to compete more effectively in the ecosystem. This can lead to increased biodiversity, as various plant and animal species can coexist when their habitats are maintained through regular fires. Furthermore, these fires can stimulate the growth of native plants that require fire for germination or for rejuvenation, thus encouraging a balanced ecological succession. In contrast, the other options suggest negative impacts of fire that do not accurately reflect the ecological benefits provided by controlled burns. For example, promoting invasive species, completely eliminating plant populations, or introducing foreign species does not align with the natural role of fire in maintaining the health of the ecosystems.