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Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Recent decline in suitable environmental conditions for African great apes
Author(s): Junker, Jessica
Blake, Stephen
Boesch, Christophe
Campbell, Genevieve
du Toit, Louwrens
Duvall, Chris
Ekobo, Atanga
Etoga, Gilles
Galat-Luong, Anh
Gamys, Joel
Ganas-Swaray, Jessica
Gatti, Sylvain
Ghiurghi, Andrea
Granier, Nicolas
Hart, John
Herbinger, Ilka
Hicks, Thurston
Imong, Inaoyom
Kuempel, Noelle
Lahm, Sally A
Maisels, Fiona
Morgan, Bethan Jane
Mulindahabi, Felix
Mundry, Roger
Normand, Emmanuelle
Tiku Okon, David
Plumptre, Andrew J
Rainey, Hugo
Stokes, Emma
Tranquilli, Sandra
Sunderland-Groves, Jacqueline
Walsh, Peter
Warren, Ymke
Williamson, Elizabeth A
Kuehl, Hjalmar
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Keywords: Bonobo
IUCN/SSC A.P.E.S. database
logistic regression
spatial model
Apes Behavior
Animal societies
Issue Date: Nov-2012
Date Deposited: 19-Oct-2012
Citation: Junker J, Blake S, Boesch C, Campbell G, du Toit L, Duvall C, Ekobo A, Etoga G, Galat-Luong A, Gamys J, Ganas-Swaray J, Gatti S, Ghiurghi A, Granier N, Hart J, Herbinger I, Hicks T, Imong I, Kuempel N, Lahm SA, Maisels F, Morgan BJ, Mulindahabi F, Mundry R, Normand E, Tiku Okon D, Plumptre AJ, Rainey H, Stokes E, Tranquilli S, Sunderland-Groves J, Walsh P, Warren Y, Williamson EA & Kuehl H (2012) Recent decline in suitable environmental conditions for African great apes. Diversity and Distributions, 18 (11), pp. 1077-1091.
Abstract: Aim: To predict the distribution of suitable environmental conditions (SEC) for eight African great ape taxa for a first time period, the 1990s and then project it to a second time period, the 2000s; to assess the relative importance of factors influencing SEC distribution and to estimate rates of SEC loss, isolation and fragmentation over the last two decades. Location: Twenty-two African great ape range countries. Methods: We extracted 15,051 presence localities collected between 1995 and 2010 from 68 different areas surveyed across the African ape range. We combined a maximum entropy algorithm and logistic regression to relate ape presence information to environmental and human impact variables from the 1990s with a resolution of 5 × 5 km across the entire ape range. We then made SEC projections for the 2000s using updated human impact variables. Results: Total SEC area was approximately 2,015,480 and 1,807,653 km2 in the 1990s and 2000s, respectively. Loss of predicted SEC appeared highest for Cross River gorillas (-59%), followed by eastern gorillas (-52%), western gorillas (-32%), bonobos (-29%), central chimpanzees (-17%) and western chimpanzees (-11%). SEC for Nigeria-Cameroon chimpanzees and eastern chimpanzees was not greatly reduced. Except for Cross River and eastern gorillas, the number of SEC patches did not change significantly, suggesting that SEC loss was caused mainly by patch size reduction. Main conclusions: The first continent-wide perspective of African ape SEC distribution shows dramatic declines in recent years. The model has clear limitations for use at small geographic scales, given the quality of available data and the coarse resolution of predictions. However, at the large scale it has potential for informing international policymaking, mitigation of resource extraction and infrastructure development, as well as for spatial prioritization of conservation effort and evaluating conservation effectiveness.
DOI Link: 10.1111/ddi.12005
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Notes: Additional co-authors: Head, J.,Huijbregts, B., Lindsell, J., McLennan, M., Martinez, L., Morgan, D., N'Goran K.P., Ntongho, A., Petre, C.A., Regnaut, S., Sanz, C., Tondossama, A.
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