ArticleEcology and evolution2016
Using Africa's protected area network to estimate the global population of a threatened and declining species: a case study of the Critically Endangered White-headed Vulture Trigonoceps occipitalis.
Article in Ecology and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Population Status and Habitat Preferences of the Critically Endangered African White-Backed Vulture (Ecology and evolution · 2026Article
- Unveiling the Threat to Vulture Diversity: A Comprehensive Ethno-Ornithological Study Uncovers Regional Trade Effects in Côte d'Ivoire.Ecology and evolution · 2024Article
- African savanna raptors show evidence of widespread population collapse and a growing dependence on protected areas.Nature ecology & evolution · 2024Article
- Application of GPS occurrence data to understand African white-backed vulturesEcology and evolution · 2022Article
- Human-raptor conflict in rural settlements of Colombia.PloS one · 2020Article
- Using areas of known occupancy to identify sources of variation in detection probability of raptors: taking time lowers replication effort for surveys.Royal Society open science · 2016Article
Corrections and comments
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Authors and funding
6 authors.
Funding
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Abstract
The White-headed Vulture Trigonoceps occipitalis (WhV) is uncommon and largely restricted to protected areas across its range in sub-Saharan Africa. We used the World Database on Protected Areas to identify protected areas (PAs) likely to contain White-headed Vultures. Vulture occurrence on road transects in Southern, East, and West Africa was adjusted to nests per km(2) using data from areas with known numbers of nests and corresponding road transect data. Nest density was used to calculate the number of WhV nests within identified PAs and from there extrapolated to estimate the global population. Across a fragmented range, 400 PAs are estimated to contain 1893 WhV nests. Eastern Africa is estimated to contain 721 nests, Central Africa 548 nests, Southern Africa 468 nests, and West Africa 156 nests. Including immature and nonbreeding birds, and accounting for data deficient PAs, the estimated global population is 5475 - 5493 birds. The identified distribution highlights are alarming: over 78% (n = 313) of identified PAs contain fewer than five nests. A further 17% (n = 68) of PAs contain 5 - 20 nests and 4% (n = 14) of identified PAs are estimated to contain >20 nests. Just 1% (n = 5) of PAs are estimated to contain >40 nests; none is located in West Africa. Whilst ranging behavior of WhVs is currently unknown, 35% of PAs large enough to hold >20 nests are isolated by more than 100 km from other PAs. Spatially discrete and unpredictable mortality events such as poisoning pose major threats to small localized vulture populations and will accelerate ongoing local extinctions. Apart from reducing the threat of poisoning events, conservation actions promoting linkages between protected areas should be pursued. Identifying potential areas for assisted re-establishment via translocation offers the potential to expand the range of this species and alleviate risk.
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