Book contents
- Gibbon Conservation in the Anthropocene
- Gibbon Conservation in the Anthropocene
- Copyright page
- Contents
- Contributors
- Foreword
- Abbreviations
- Introduction
- 1 Taxonomy, Ecology and Conservation of Cao Vit Gibbon (Nomascus nasutus) since Its Rediscovery
- 2 Conservation Status of the Northern Yellow-Cheeked Crested Gibbon (Nomascus annamensis) in Vietnam
- 3 Strategies for Recovery of the Hainan Gibbon (Nomascus hainanus)
- 4 Gibbons in the Anthropocene
- 5 Demography of a Stable Gibbon Population in High-Elevation Forest on Java
- 6 A Tale of Two Gibbon Studies in Thailand
- 7 Accessibility as a Factor for Selecting Conservation Actions for Pileated Gibbons (Hylobates pileatus)
- 8 Calling from the Wild
- 9 Demography and Group Dynamics of Western Hoolock Gibbons (Hoolock hoolock) in a Community Conserved Village Population in Upper Assam, India
- 10 Challenges and Prospects in the Conservation of Hoolock Gibbon in India
- 11 Gibbons of Assam
- 12 Movement Ecology of Siamang in a Degraded Dipterocarp Forest
- 13 Sympatric Gibbons in Historically Logged Forest in North Sumatra, Indonesia
- 14 Adopting an Interdisciplinary Biosocial Approach to Determine the Conservation Implications of the Human–Gibbon Interface
- 15 Listen to the People, Hear the Gibbons Sing
- 16 Long-Term Outcomes of Positive Cultural Value for Biodiversity
- 17 Gibbon Phylogenetics and Genomics
- 18 The Use of Microsatellites in the Management of Captive Gibbons
- Index
- References
13 - Sympatric Gibbons in Historically Logged Forest in North Sumatra, Indonesia
Published online by Cambridge University Press: 13 April 2023
- Gibbon Conservation in the Anthropocene
- Gibbon Conservation in the Anthropocene
- Copyright page
- Contents
- Contributors
- Foreword
- Abbreviations
- Introduction
- 1 Taxonomy, Ecology and Conservation of Cao Vit Gibbon (Nomascus nasutus) since Its Rediscovery
- 2 Conservation Status of the Northern Yellow-Cheeked Crested Gibbon (Nomascus annamensis) in Vietnam
- 3 Strategies for Recovery of the Hainan Gibbon (Nomascus hainanus)
- 4 Gibbons in the Anthropocene
- 5 Demography of a Stable Gibbon Population in High-Elevation Forest on Java
- 6 A Tale of Two Gibbon Studies in Thailand
- 7 Accessibility as a Factor for Selecting Conservation Actions for Pileated Gibbons (Hylobates pileatus)
- 8 Calling from the Wild
- 9 Demography and Group Dynamics of Western Hoolock Gibbons (Hoolock hoolock) in a Community Conserved Village Population in Upper Assam, India
- 10 Challenges and Prospects in the Conservation of Hoolock Gibbon in India
- 11 Gibbons of Assam
- 12 Movement Ecology of Siamang in a Degraded Dipterocarp Forest
- 13 Sympatric Gibbons in Historically Logged Forest in North Sumatra, Indonesia
- 14 Adopting an Interdisciplinary Biosocial Approach to Determine the Conservation Implications of the Human–Gibbon Interface
- 15 Listen to the People, Hear the Gibbons Sing
- 16 Long-Term Outcomes of Positive Cultural Value for Biodiversity
- 17 Gibbon Phylogenetics and Genomics
- 18 The Use of Microsatellites in the Management of Captive Gibbons
- Index
- References
Summary
The complex structural canopy of tropical forests is extremely important for the survival and continued presence of arboreal primates. The destruction and degradation of tropical rainforest on the Indonesian island of Sumatra is causing significant declines in the endemic gibbon species residing in these shrinking habitats. This chapter compares recent density estimates of the lar gibbon (Hylobates lar) and the siamang (Symphalangus syndactylus) in a historically logged area of lowland forest, Sikundur, north Sumatra, to range-wide densities of both species and the ecologically similar agile gibbon (Hylobates agilis) across the island. Density estimates for Sumatran gibbon species are largely influenced by altitude and habitat preference. Siamang densities in Sikundur were similar to previously obtained range-wide densities, whereas lar gibbon densities were lower than their reported natural density range. Sikundur’s degraded forest, consisting of reduced tree heights and low tree connectivity, has potentially impeded the ability of the lar gibbon to attain higher densities. However, the presence of these small apes in this degraded lowland forest, albeit at lower densities, demonstrates that these areas can still be important habitats for gibbons, and emphasises the importance of ongoing regeneration of previously degraded forest for the future survival of these species.
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- Gibbon Conservation in the Anthropocene , pp. 206 - 223Publisher: Cambridge University PressPrint publication year: 2023