Usun Apau National Park
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Summary










- Northwest Bornean orangutans (Pongo pygmaeus pygmaeus) are present in Usun Apau National Park.
- The population size is unknown.
- The population trend is unknown.
Site characteristics
Usun Apau National Park is described as pristine area known for its waterfalls. The government aims to develop ecotourism at Usun Apau National Park (Sarawak Tribune 2022). Usun Apau was also proposed to be included in the extension of the Heart of Borneo as part of Extended Baram Complex (Mathai et al. 2016). Other species such as Presbytis hosei and Presbytis rubicunda ignita are found in this national park (Ang et al.2024).
Table 1. Basic site information for Usun Apau National Park
Species | 'Pongo pygmaeus pygmaeus |
Area | 1,550 km² |
Coordinates | Lat: 2.916324 , Lon: 114.665293 |
Type of site | Protected area (National Park) |
Habitat types | Subtropical/tropical moist montane forest, Rocky areas (inland cliffs, mountain peaks) |
Type of governance | Governance by government |
IUCN habitat categories Site designations
Ape status
Table 2. Ape population estimates reported for Usun Apau National Park
Species | Year | Occurrence | Encounter or vistation rate (nests/km; ind/day) | Density estimate [ind./ km²] (95% CI) | Abundance estimate (95% CI) | Survey area | Sampling method | Analytical framework | Source | Comments | A.P.E.S. database ID |
---|---|---|---|---|---|---|---|---|---|---|---|
'Pongo pygmaeus pygmaeus | 2017-2020 | Present | Line transects | Ampeng et al. 2021 | The survey using line transects found one individual Bornean orangutan and 4 orangutan nests. | ||||||
'Pongo pygmaeus pygmaeus | 2017-2020 | Absent | Aerial (drones/plane/helicopter) | Ampeng et al. 2021 | Aerial surveys fitted with FLIR-cameras were unable to confirm the presence of additional nests from daytime aerial photographs. |
Threats
Conservation activities
Challenges
Enablers
Research activities
There was an expedition in Usun Apau Plateau by an Oxford University in 1955 (Arnold 1957). The expedition explored the plateau and also conducted archaelogical excavations from old longhouses. Besides that, a study on dragonfly was also conducted in Usun Apau National Park in 2012, through collaboration between Naturalis Biodiversity Center, St Anne's Close and National Biodiversity Centre (Dow, Reels, and Ngiam 2015). They found 55 odonate species during the time period. WWF also documented Usun Apau National Park in their publication entitled "The Environmental Status of Borneo" published in 2017 (Wulffraat & Greenwood 2017).
Documented behaviours
Exposure to climate change impacts
External links
Relevant datasets
References
Ampeng, A., Liam, J., Simpson, B., Traelholt, C., Nor, S. M., Abdan-Saleman, M. S. B., ... & Md-Zain, B. M. (2021). First Bornean orangutan sighting in Usun Apau National Park, Sarawak. Biodiversity Data Journal, 9.
Ang, A., Brandon-Jones, D., Ruppert, N., Lee, Z. H., Affendi, A., Stanly Anyie, Y., Boonratana, R., Cheyne, S. M., Chua, A., Hayunieta, Irawan, A., Jerusalinsky, L., Karuniawati, A., Khalid, S., Koh, J., Lee, C., Lhota, S., Lwin, N., Mittermeier, R. A., … Roos, C. (2024). Asian langurs (Presbytis) conservation action plan 2024–2034. IUCN. https://portals.iucn.org/library/node/51546
Dow, R. A., Reels, G. T., & Ngiam, R. W. (2015). Odonata collected at Usun Apau National Park, Miri Division, Sarawak, Malaysia in April and May 2012. International Dragonfly Fund: Report, 1-17.
Mathai, J., Duckworth, J. W., Meijaard, E., Fredriksson, G., Hon, J., Sebastian, A., ... & Wilting, A. (2016). Carnivore conservation planning on Borneo: identifying key carnivore landscapes, research priorities and conservation interventions. Raffles Bulletin of Zoology.
Sarawak Tribune. 2022. Government to develop Usun Apau as tourist attraction. https://www.newsarawaktribune.com.my/government-to-develop-usun-apau-as-tourist-attraction/
Wulffraat, S. and Greenwood, C. (2017). The environmental status of Borneo. WWF Heart of Borneo Programme.
Page created by: Cristiar Samosir Date: 2024-11-26 13:43:00