Recent surveys in the forests of Ulu Segama Malua, Sabah, Malaysia, show that orang-utans (P. p. morio) can be maintained in slightly logged forests.

PloS One
Marc AncrenazIsabelle Lackman

Abstract

Today the majority of wild great ape populations are found outside of the network of protected areas in both Africa and Asia, therefore determining if these populations are able to survive in forests that are exploited for timber or other extractive uses and how this is managed, is paramount for their conservation. In 2007, the "Kinabatangan Orang-utan Conservation Project" (KOCP) conducted aerial and ground surveys of orang-utan (Pongo pygmaeus morio) nests in the commercial forest reserves of Ulu Segama Malua (USM) in eastern Sabah, Malaysian Borneo. Compared with previous estimates obtained in 2002, our recent data clearly shows that orang-utan populations can be maintained in forests that have been lightly and sustainably logged. However, forests that are heavily logged or subjected to fast, successive coupes that follow conventional extraction methods, exhibit a decline in orang-utan numbers which will eventually result in localized extinction (the rapid extraction of more than 100 m(3) ha(-1) of timber led to the crash of one of the surveyed sub-populations). Nest distribution in the forests of USM indicates that orang-utans leave areas undergoing active disturbance and take momentarily refuge in surrounding forests that ...Continue Reading

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Citations

May 28, 2014·Folia primatologica; international journal of primatology·Helen C Morrogh-BernardDavid J Chivers
Mar 3, 2011·PloS One·Gail Campbell-SmithMatthew Linkie
Apr 13, 2011·PloS One·Erik MeijaardAndrew J Marshall
Jul 7, 2011·PloS One·Gail Campbell-SmithMatthew Linkie
May 23, 2012·Ecological Applications : a Publication of the Ecological Society of America·David P EdwardsDavid S Wilcove
Dec 20, 2011·Annals of the New York Academy of Sciences·Erik MeijaardAndrew J Marshall
Jan 7, 2015·Global Change Biology·Matthew J StruebigStephanie Kramer-Schadt
Aug 24, 2013·PloS One·David L A GaveauErik Meijaard
Jul 18, 2019·PloS One·Donna SimonMarc Ancrenaz
Aug 15, 2020·Science·Christopher D PhilipsonDavid F R P Burslem
Jul 9, 2017·Scientific Reports·Truly SantikaErik Meijaard
Jul 20, 2017·Proceedings of the National Academy of Sciences of the United States of America·Andrew B DaviesGregory P Asner

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