waxbill (Estrilda troglodytes), and waterbirds Threats Water supply to the depressions in the park has become a major issue for preservation of biodiversity. This situation has arisen on account of construction of the Maga Dam about to the south of the park. Irrigation embankments have also been built along the Logone River, which resulted in poorer grasslands and total elimination of fisheries in some areas. This also resulted in drastic reduction of the antelope population. Under the Logone Project artificial waterholes were dug, providing water all through the year, but the carrying capacity of the floodplain has remained low. A study carried out on the effect of elephants on the survival of acacia trees discovered that the impact is not serious, but needs be monitored in order to ensure that the vegetation in the park is well conserved. The study stresses inter-alia the need to restore the hydrological balance of the Waza–Logone floodplain. Field studies carried out on the killings of lions by poachers in Waza park has indicated that only about 40 lions remain, and they may soon become extinct. One of the reasons attributed to this is inadequate patrolling. Though the IUCN prescribed a norm of one guard to 5000 ha of protected area, the eco-guards in the park number far less. This situation is now fairly addressed. Management The park is managed by the Conservation Service of the Waza National Park, part of the Cameroon Ministry of Environment and the Protection of Nature. Waza, which was considered the best-managed protected area in Cameroon, now has established collaboration with the IUCN Waza-Logone project to improve the water availability conditions, specifically in Waza National Park () and the much smaller Kalamaloue National Park (), as well as other areas adjoining them through the Waza-Logone Project. The area covered under this project, which forms the flood plains of the basin covered by the two river systems of the Logone River to the Logomatya River, contributed significantly to the floodplain Biosphere Reserve, and sustained a very large number of mammals and birds which depended on the annual inundation of the flood plain. With the construction of the Maga Dam, built for irrigated agriculture of rice, the water resource contribution to the flood plains underwent a drastic reduction. To improve the sustainability of the flood plains of the two parks, IUCN embarked on a project titled "IUCN’s Waza-Logone Project" with specific objectives