Gazelle–livestock interactions and impact of water resource development in the Ouadi Rimé–Ouadi Achim Reserve, Chad

OryxbElectronic resource

article

Tim Wacher¹  Rajan Amin²  John Newby²  Mahamat Hassan Hatcha³  Krazidi Abeye²  Habib Ali²  Sadock Zeubobe Bourtchiakbé³  Felix Ndoassal Banlongar³ 

[1] Zoological Society of London;Sahara Conservation Fund;Direction de la Faune et des Aires Protégées

关键词: Chad;    dama gazelle;    dorcas gazelle;    livestock;    Ouadi Rimé–Ouadi Achim Reserve;    pastoralism;    Sahel;    sustainable development;   

DOI  :  10.1017/S0030605321001629

来源: Cambridge Core

【 摘 要 】

The Ouadi Rimé–Ouadi Achim Reserve (Réserve de l'Ouadi Rimé–Ouadi Achim) in central Chad supports large numbers of livestock and rare antelopes, and is the site of ongoing reintroductions of the scimitar-horned oryx Oryx dammah and addax Addax nasomaculatus. We present results of surveys conducted during 2011–2019 to examine patterns of relative abundance and distribution of dorcas gazelles Gazella dorcas, dama gazelles Nanger dama and livestock in relation to each other and to water sources in a 3,500 km2 area in the centre of the Reserve. Dorcas gazelles numbered 7,700–18,000, moving extensively across the area. Livestock varied between c. 2,000 and 68,000 tropical livestock units across surveys, with density doubling in the wet season. Dorcas gazelle distribution was negatively associated with livestock, and livestock density was positively associated with artificial water sources. Dorcas gazelle densities were positively associated with locations where there had been wild fires in the 6 months prior to a survey. Dama gazelles were encountered only 13 times, insufficient to estimate their population size reliably. Opportunistic observations suggest dama gazelles avoid livestock and burnt ground. Our findings highlight the importance of the Reserve. We recommend the designation of a large, well-managed conservation priority zone in the Reserve's core area in which no further development of water resources is permitted. Management of livestock numbers within this zone at or below current levels is essential to integrate national goals for both biodiversity conservation and pastoralism development.

【 授权许可】

Unknown