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- W2112029630 abstract "The concentration of over 25,000 ungulates inside Ngorongoro Crater on a 250 km2 patch of the African plains was a major reason for designating the Ngorongoro Conservation Area as a World Heritage Site in 1979. As one of East Africa’s premier tourist attractions, it is also a major source of foreign exchange for Tanzania. This paper reports the decline of populations of wildebeest, Thomson’s and Grant’s gazelles since the mid-1980s and the rise to dominance of the buffalo, the results of research carried out from 1996 to 2000 on the Crater ungulates, and discusses natural and anthropogenic factors that may be linked to the population changes. Samples comparing young:adult female ratios in Ngorongoro and Serengeti populations indicated higher survival rates of Crater wildebeest and zebra young, and lower survival rates of Thomson’s gazelle. The possibility that predation by lions and spotted hyenas was responsible for reductions in the ungulate populations is belied by corresponding declines in the number of predators. Further research in the Ngorongoro Conservation Area is urgently needed to increase understanding of this complex ecosystem and promote effective stewardship, not only of Ngorongoro Crater but of the Serengeti ecosystem, of which the NCA is an integral part, comprising an International Biosphere Reserve. Our recommendations include establishment of a scientific advisory board and a research center that would attract and accommodate Tanzanian and foreign scientists." @default.
- W2112029630 created "2016-06-24" @default.
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- W2112029630 date "2006-07-01" @default.
- W2112029630 modified "2023-09-25" @default.
- W2112029630 title "Downward trends in Ngorongoro Crater ungulate populations 1986–2005: Conservation concerns and the need for ecological research" @default.
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- W2112029630 doi "https://doi.org/10.1016/j.biocon.2006.02.009" @default.
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