Praires absolutely do require management. Floods and fires can and do lead to critical endangerment of plants and animals.
Overgrazing wildlife also need to be controlled with predators who in turn often need to be contained to prevemt damage to human settlements or overpopulation leading to periods of death and disease for the animals.
In theory if you have well suited animals to fill each role, wide open replacement habitats for migrating to in emergency, and no invasive pest problems; it could be self sufficient, but thats pretty much never going to be the case.
Praires absolutely do require management. Floods and fires can and do lead to critical endangerment of plants and animals.
Overgrazing wildlife also need to be controlled with predators who in turn often need to be contained to prevemt damage to human settlements or overpopulation leading to periods of death and disease for the animals.
In theory if you have well suited animals to fill each role, wide open replacement habitats for migrating to in emergency, and no invasive pest problems; it could be self sufficient, but thats pretty much never going to be the case.