The Serengeti ecosystem is a geographical region in Africa, spanning the Mara and Arusha Regions of Tanzania. The protected area within the region includes approximately 30,000 km² of land, including the Serengeti National Park and several game reserves.The Serengeti ecosystem is a geographical region in Africa, spanning the Mara and Arusha Regions of Tanzania. The protected area within the region includes approximately 30,000 km² of land, including the Serengeti National Park and several game reserves.