Dropping dead: causes and consequences of vulture population declines worldwide
- 16 December 2011
- journal article
- review article
- Published by Wiley in Annals of the New York Academy of Sciences
- Vol. 1249 (1), 57-71
- https://doi.org/10.1111/j.1749-6632.2011.06293.x
Abstract
Vultures are nature's most successful scavengers, and they provide an array of ecological, economic, and cultural services. As the only known obligate scavengers, vultures are uniquely adapted to a scavenging lifestyle. Vultures' unique adaptations include soaring flight, keen eyesight, and extremely low pH levels in their stomachs. Presently, 14 of 23 (61%) vulture species worldwide are threatened with extinction, and the most rapid declines have occurred in the vulture-rich regions of Asia and Africa. The reasons for the population declines are varied, but poisoning or human persecution, or both, feature in the list of nearly every declining species. Deliberate poisoning of carnivores is likely the most widespread cause of vulture poisoning. In Asia, Gyps vultures have declined by >95% due to poisoning by the veterinary drug diclofenac, which was banned by regional governments in 2006. Human persecution of vultures has occurred for centuries, and shooting and deliberate poisoning are the most widely practiced activities. Ecological consequences of vulture declines include changes in community composition of scavengers at carcasses and an increased potential for disease transmission between mammalian scavengers at carcasses. There have been cultural and economic costs of vulture declines as well, particularly in Asia. In the wake of catastrophic vulture declines in Asia, regional governments, the international scientific and donor communities, and the media have given the crisis substantial attention. Even though the Asian vulture crisis focused attention on the plight of vultures worldwide, the situation for African vultures has received relatively little attention especially given the similar levels of population decline. While the Asian crisis has been largely linked to poisoning by diclofenac, vulture population declines in Africa have numerous causes, which have made conserving existing populations more difficult. And in Africa there has been little government support to conserve vultures despite mounting evidence of the major threats. In other regions with successful vulture conservation programs, a common theme is a huge investment of financial resources and highly skilled personnel, as well as political will and community support.Keywords
This publication has 64 references indexed in Scilit:
- Effectiveness of Action in India to Reduce Exposure of Gyps Vultures to the Toxic Veterinary Drug DiclofenacPLOS ONE, 2011
- Major declines in the abundance of vultures and other scavenging raptors in and around the Masai Mara ecosystem, KenyaBiological Conservation, 2010
- Lead Poisoning and the Reintroduction of the California Condor in Northern ArizonaJournal of Avian Medicine and Surgery, 2009
- Poison-related mortality effects in the endangered Egyptian vulture (Neophron percnopterus) population in SpainEuropean Journal of Wildlife Research, 2009
- Counting the cost of vulture decline—An appraisal of the human health and other benefits of vultures in IndiaEcological Economics, 2008
- The nested structure of a scavenger communityProceedings Of The Royal Society B-Biological Sciences, 2007
- The decline of raptors in West Africa: long‐term assessment and the role of protected areasIbis, 2006
- Obligate vertebrate scavengers must be large soaring fliersJournal of Theoretical Biology, 2004
- Raptors drowning in farm reservoirs in South AfricaOstrich, 1999
- STATUS OF CAPE VULTURES IN THE NATAL DRAKENSBERG AND THEIR CLIFF SITE SELECTIONOstrich, 1988