Whiterock Conservancy

The predominant plant community at Whiterock is oak-dominated forest, covering about 1,200 acres of the total landscape. Oak savanna, an ecosystem that was once widely distributed in the state of Iowa, is currently one of the most endangered in the region, with less than 0.1% of the original tract remaining. Whiterock Conservancy is actively restoring oak savanna habitat through the reintroduction of fire, periodic grazing, and mechanical removal of invasive shrubs and trees.

Oak savanna is characterized by two layers: an overstory of scattered, widespread oaks (mostly bur oaks and black oaks) with an understory of wildflowers, sedges and grasses.

Much like the state of Iowa, the vast majority of the Whiterock Conservancy landscape was historically covered in tall and mid-grass prairies. Today, very little remains. Currently, a total of 26 acres of native prairie remnants and 600 acres of reconstructed prairie are present on the property, 240-acres of which were recently planted in the fall of 2008, and 110 acres in 2009.

While highly intact as a land base, much of Whiterock is in need of intense restoration efforts to protect and conserve rare habitats and restore key ecosystem functions and services. Like oak savannas, prairies on Whiterock Conservancy lands are also managed with prescribed fire and mechanical removal of invasive species. In addition, some of our prairie acreages are being integrated into the rotational grazing program.

Whiterock Conservancy focuses on using a variety of tools to foster a healthy and resilient environment. Historically, fire was an important part of Iowa's landscape. It helped to create and maintain habitat, recycle nutrients and maintain a level of ecosystem functional balance on the land that helped minimize the impact of other disturbances, like flooding. Fire, an ecosystem disturbance, has been dramatically curbed on the Iowa landscape over the last 100 years, resulting in a highly degraded and poorly functioning Iowa ecosystem.

Agricultural production is an important part of the Iowa landscape. Although economic production is a primary for many landowners, some production systems, such as grazing beef cattle, are also an important part of the land's native disturbance regime.

Whiterock Conservancy uses cattle grazing to model a system that helps rural landowners derive income from the land while also achieving restoration and conservation goals. In 2009, Whiterock Conservancy implemented a sustainable pasture management system to create more effective cattle rotations to protect ground cover.[3] Interior fences were constructed to exclude cattle from riparian areas.