How did controlled burns help restore prairie plants at North Branch?

At the North Branch site in Illinois, initial efforts to restore prairies by planting seeds gathered from remnants were unsuccessful because animals consumed the small, growing plants.1

To overcome this, volunteers implemented a natural fire regime through controlled burns. This process was technically challenging to execute safely near residential areas, but once established, the results were immediate and dramatic: the original prairie plants flourished while competing weeds retreated.1

By restoring fire, the volunteers effectively mimicked the historical conditions necessary for grassland ecosystems to persist. In these fire-adapted environments, fire serves to reduce competition from non-native or invasive species and promotes the health and reproduction of native vegetation. This approach is a fundamental aspect of ecological restoration, demonstrating that successfully saving an original ecological community requires not only the right mix of species but also the restoration of the natural processes—such as fire—that sustain them.2341