Take a seat on Zach’s chair and enjoy the view of a savanna restoration. An oak savanna consists of mostly prairie plants with a scattering of oak trees. In Iowa, Bur Oaks are the most common tree found in savanna habitats. Since the trees have a relatively open canopy, it allows for a mix of shade and sun tolerant prairie grasses and forbs to flourish. The plants growing in this area help keep soil in place with their deep roots, reducing runoff and limiting erosion. Types of vegetation found in these areas can vary in frequency and are influenced by soil, topography, climate, grazing animals, and fire. Fire is a critical element in the lifecycle of a savanna. Bur Oak trees are less susceptible to fire damage due to their thick bark. Historically, oaks were able to survive fires while other trees were suppressed. Nahant staff periodically burn the prairies at Nahant Marsh to allow for new plants to emerge and to set back invasive shrubs.