In erosion control, what is the purpose of buffer strips?

Buffer strips play a crucial role in erosion control by functioning as zones that absorb excess water and nutrients. These strips, often made up of grass, shrubs, or trees, are strategically placed between agricultural land and water bodies, helping to filter runoff before it enters the water. This filtering process reduces nutrient loading in nearby streams and rivers, which can prevent issues such as eutrophication, where nutrient oversaturation promotes harmful algal blooms.

By absorbing both water and nutrients, buffer strips help maintain soil moisture and improve water quality, ultimately benefiting the ecosystem. Additionally, they can reduce the speed of surface runoff, allowing for more water infiltration into the ground, which further supports the health of the surrounding environment.

The other options do not align with the primary function of buffer strips. While acting as barriers to wildlife may be a consideration for some land management practices, it is not the central purpose of buffer strips. Enhancing water temperature is typically counterproductive to aquatic life, as cooler temperatures are generally preferred. Promoting urban development directly contradicts the intent of buffer strips, which aim to protect natural resources and ecosystems rather than facilitate urbanization.