Reference : Will Elephants Soon Disappear from West African Savannahs?
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/95979
Will Elephants Soon Disappear from West African Savannahs?
English
Bouché, Philippe mailto [Université de Liège - ULg > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels >]
Douglas-Hamilton, Iain [> >]
Wittemyer, George [> >]
Nianogo, Aimé [> >]
Doucet, Jean-Louis mailto [Université de Liège - ULg > Forêts, Nature et Paysage > Laboratoire de Foresterie des régions trop. et subtropicales >]
Lejeune, Philippe mailto [Université de Liège - ULg > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels >]
Vermeulen, Cédric mailto [Université de Liège - ULg > Forêts, Nature et Paysage > Laboratoire de Foresterie des régions trop. et subtropicales >]
23-Jun-2011
PLoS ONE
Public Library of Science
6
6
1-11
Yes (verified by ORBi)
International
1932-6203
San Franscisco
CA
[en] Elephant distribution ; Elephant population trend ; Elephant survey ; ivory trade ; Sudano Sahelian savannah
[en] Precipitous declines in Africa’s native fauna and flora are recognized, but few comprehensive records of these changes have
been compiled. Here, we present population trends for African elephants in the 6,213,000 km2 Sudano-Sahelian range of
West and Central Africa assessed through the analysis of aerial and ground surveys conducted over the past 4 decades.
These surveys are focused on the best protected areas in the region, and therefore represent the best case scenario for the
northern savanna elephants. A minimum of 7,745 elephants currently inhabit the entire region, representing a minimum
decline of 50% from estimates four decades ago for these protected areas. Most of the historic range is now devoid of elephants and, therefore, was not surveyed. Of the 23 surveyed elephant populations, half are estimated to number less than 200 individuals. Historically, most populations numbering less than 200 individuals in the region were extirpated within a few decades. Declines differed by region, with Central African populations experiencing much higher declines (276%) than those in West Africa (233%). As a result, elephants in West Africa now account for 86% of the total surveyed. Range wide, two refuge zones retain elephants, one in West and the other in Central Africa. These zones are separated by a large distance (,900 km) of high density human land use, suggesting connectivity between the regions is permanently cut. Within each zone, however, sporadic contacts between populations remain. Retaining such connectivity should be a high priority for conservation of elephants in this region. Specific corridors designed to reduce the isolation of the surveyed populations are proposed. The strong commitment of governments, effective law enforcement to control the illegal ivory trade and the involvement of local communities and private partners are all critical to securing the future of elephants inhabiting Africa’s northern savannas.
Unité de Gestion des Ressources Forestie`res et des Milieux Naturels, Université de Liège Gembloux Agro-Bio Tech, Gembloux, Belgium; Save The Elephants, Nairobi, Kenya; Department of Fish, Wildlife and Conservation Biology, Colorado State University, Fort Collins, Colorado, United States of America; Programme pour l’Afrique Centrale et Occidentale (PACO), International Union for Conservation of Nature (IUCN), Ouagadougou, Burkina Faso; Department of Zoology, Oxford University, Oxford, United Kingdom
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/2268/95979
10.1371/journal.pone.0020619

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