Scientific Reports (Jul 2017)
First integrative trend analysis for a great ape species in Borneo
- Truly Santika,
- Marc Ancrenaz,
- Kerrie A. Wilson,
- Stephanie Spehar,
- Nicola Abram,
- Graham L. Banes,
- Gail Campbell-Smith,
- Lisa Curran,
- Laura d’Arcy,
- Roberto A. Delgado,
- Andi Erman,
- Benoit Goossens,
- Herlina Hartanto,
- Max Houghton,
- Simon J. Husson,
- Hjalmar S. Kühl,
- Isabelle Lackman,
- Ashley Leiman,
- Karmele Llano Sanchez,
- Niel Makinuddin,
- Andrew J. Marshall,
- Ari Meididit,
- Kerrie Mengersen,
- Musnanda,
- Nardiyono,
- Anton Nurcahyo,
- Kisar Odom,
- Adventus Panda,
- Didik Prasetyo,
- Purnomo,
- Andjar Rafiastanto,
- Slamet Raharjo,
- Dessy Ratnasari,
- Anne E. Russon,
- Adi H. Santana,
- Eddy Santoso,
- Iman Sapari,
- Jamartin Sihite,
- Ahmat Suyoko,
- Albertus Tjiu,
- Sri Suci Utami-Atmoko,
- Carel P. van Schaik,
- Maria Voigt,
- Jessie Wells,
- Serge A. Wich,
- Erik P. Willems,
- Erik Meijaard
Affiliations
- Truly Santika
- The University of Queensland, School of Biological Sciences
- Marc Ancrenaz
- Borneo Futures
- Kerrie A. Wilson
- The University of Queensland, School of Biological Sciences
- Stephanie Spehar
- Anthropology Program, University of Wisconsin Oshkosh
- Nicola Abram
- The University of Queensland, School of Biological Sciences
- Graham L. Banes
- School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue
- Gail Campbell-Smith
- Yayasan IAR Indonesia
- Lisa Curran
- Department of Anthropology, Stanford University, Stanford
- Laura d’Arcy
- Orangutan Tropical Peatland Project, The Center for International Cooperation in the Sustainable Management of Tropical Peatlands (CIMTROP), University of Palangka Raya
- Roberto A. Delgado
- Departments of Anthropology and Biological Sciences, Program in Integrative and Evolutionary Biology (IEB), University of Southern California
- Andi Erman
- GFA/KWF, Kapuas Hulu Program
- Benoit Goossens
- Organisms and Environment Division, Cardiff School of Biosciences, Cardiff University
- Herlina Hartanto
- The Nature Conservancy (TNC) Indonesia
- Max Houghton
- Research Centre in Evolutionary Anthropology, and Palaeoecology, School of Natural Sciences and Psychology, Liverpool John Moores University
- Simon J. Husson
- Orangutan Tropical Peatland Project, The Center for International Cooperation in the Sustainable Management of Tropical Peatlands (CIMTROP), University of Palangka Raya
- Hjalmar S. Kühl
- Max Planck Institute for Evolutionary Anthropology
- Isabelle Lackman
- Kinabatangan Orang-utan Conservation Programme
- Ashley Leiman
- Orangutan Foundation
- Karmele Llano Sanchez
- Yayasan IAR Indonesia
- Niel Makinuddin
- The Nature Conservancy (TNC) Indonesia
- Andrew J. Marshall
- Department of Anthropology, Program in the Environment, and School for Natural Resources and Environment, University of Michigan
- Ari Meididit
- Biology Faculty, Universitas Nasional (UNAS)
- Kerrie Mengersen
- Science and Engineering Faculty, Queensland University of Technology
- Musnanda
- The Nature Conservancy (TNC) Indonesia
- Nardiyono
- Austindo Nusantara Jaya Tbk
- Anton Nurcahyo
- College of Arts and Social Sciences, The Australian National University
- Kisar Odom
- Borneo Orangutan Survival Foundation (BOSF)
- Adventus Panda
- World Wide Fund for Nature-Indonesia (WWF-Indonesia)
- Didik Prasetyo
- The Indonesian Association of Primatologists (PERHAPPI)
- Purnomo
- The Nature Conservancy (TNC) Indonesia
- Andjar Rafiastanto
- Flora and Fauna International-Indonesia
- Slamet Raharjo
- Faculty of Veterinary Medicine, Gadjah Mada University (UGM)
- Dessy Ratnasari
- Lembaga Living Landscapes Indonesia (LLI)
- Anne E. Russon
- Psychology Department, Glendon College of York University
- Adi H. Santana
- Biology Faculty, Universitas Nasional (UNAS)
- Eddy Santoso
- Yayasan Orangutan Indonesia (YAYORIN)
- Iman Sapari
- Yayasan Orangutan Indonesia (YAYORIN)
- Jamartin Sihite
- Restorasi Habitat Orangutan Indonesia (RHOI)
- Ahmat Suyoko
- Borneo Orangutan Survival Foundation (BOSF)
- Albertus Tjiu
- World Wide Fund for Nature-Indonesia (WWF-Indonesia)
- Sri Suci Utami-Atmoko
- Biology Faculty, Universitas Nasional (UNAS)
- Carel P. van Schaik
- Anthropological Institute and Museum
- Maria Voigt
- Max Planck Institute for Evolutionary Anthropology
- Jessie Wells
- The University of Queensland, School of Biological Sciences
- Serge A. Wich
- Research Centre in Evolutionary Anthropology, and Palaeoecology, School of Natural Sciences and Psychology, Liverpool John Moores University
- Erik P. Willems
- Anthropological Institute and Museum
- Erik Meijaard
- ARC Centre of Excellence for Environmental Decisions, The University of Queensland
- DOI
- https://doi.org/10.1038/s41598-017-04435-9
- Journal volume & issue
-
Vol. 7,
no. 1
pp. 1 – 16
Abstract
Abstract For many threatened species the rate and drivers of population decline are difficult to assess accurately: species’ surveys are typically restricted to small geographic areas, are conducted over short time periods, and employ a wide range of survey protocols. We addressed methodological challenges for assessing change in the abundance of an endangered species. We applied novel methods for integrating field and interview survey data for the critically endangered Bornean orangutan (Pongo pygmaeus), allowing a deeper understanding of the species’ persistence through time. Our analysis revealed that Bornean orangutan populations have declined at a rate of 25% over the last 10 years. Survival rates of the species are lowest in areas with intermediate rainfall, where complex interrelations between soil fertility, agricultural productivity, and human settlement patterns influence persistence. These areas also have highest threats from human-wildlife conflict. Survival rates are further positively associated with forest extent, but are lower in areas where surrounding forest has been recently converted to industrial agriculture. Our study highlights the urgency of determining specific management interventions needed in different locations to counter the trend of decline and its associated drivers.
