Pulau Siberut (15807)
Indonesia, Asia
Site overview
KBA status: confirmed
Year of last assessment: 2006
National site name: Pulau Siberut
Central coordinates: Latitude: -1.3833, Longitude: 98.9167
System: marine, terrestrial
Elevation (m): 0 to 380
Area of KBA (km2): 1536.23603
Protected area coverage (%): 98.20
KBA classification: Global/Regional TBD
Legacy site: Yes
Site details
Site description: Siberut is the biggest island in Mentawai Islands. This area still widely forested, although logging and shifting agriculture exist.
Rationale for qualifying as KBA: This site qualifies as a Key Biodiversity Area of international significance because it meets one or more previously established criteria and thresholds for identifying sites of biodiversity importance (including Important Bird and Biodiversity Areas, Alliance for Zero Extinction sites, and Key Biodiversity Areas) KBA identified in the CI/CEPF Conservation Outcomes poster for Sumatra [Sundaland Hotspot] (2007). Taxonomy, nomenclature and threat status follow the 2004 IUCN Red List.
Additional biodiversity: One of endemic bird species, Mentawai Scops-Owl Otus mentawI, in Siberut, Sipora Islands and north and south part of Pagai Islands. The species determines the status of this area as Secondary Endemic Bird Area. Siberut and Mentawai also support 13 endemic bird sub-species (WWF 1980, Holmes 1994) Non-bird biodiversity: Other biodiversity include Hylobates klossii, Macaca pagensis, Presbytis potenziani dan Simias concolor (WWF 1980, Whitten et.al.1987)The beaches of this area also nesting sites for Chelonia mydas, Dermochelys coriacea and Eretmochleys imbricata. Crocodylus porosus is also recorded in the coastal area (Colijn 1999)
Delineation rationale: The 2001 IBA 'Siberut' covers the whole island and thus encloses two 2006 KBAs (which have been merged into this site in WBDB): Pulau Siberut (a reduced version of this site) and Hutan Siberut Utara (Paleonan Forest) (34,225 ha; 1deg 2.4min S 98deg45.6min E).
Habitats
Summary of habitats in KBA: This area covered by lowland evergreen dipterocarp rain forest, mixed lowland evergreen forest and freshwater swamp/peat swamp. There are beach and mangrove forests along the east and south east coast of the island. There are secondary forests and open areas for agriculture (Kempt 2000)
Land use: agriculture | nature conservation and research
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Artificial - Terrestrial | 33 | |
| Wetlands(Inland) | 33 | |
| Forest | 33 |
Threats
Summary of threats to biodiversity at KBA: Agricultural intesification, forest clearence, and tourism. There is a clearence proposal for oil palm plantation (Kempt 2000).
Additional information
References: Anon. 1998. Statistik Perlindungan Hutan dan Pelestarian Alam 1997/1998. Departemen Kehutanan dan Perkebunan, Direktorat Jenderal Perlindungan Hutan dan Pelestarian Alam, Jakarta.Colijn, E.O. 1999. The Indonesian Nature Conservation Database. URL: http://www.bart.nl/-edcolijn/index.html.Holmes, D.A. 1994. A review of the land birds of the West Sumatran Islands. Kukila 7(1): 28-46.Kempt, N. (2000). The Birds of Siberut Island, Mentawai, West Sumatra. Kukila 11 (in prep.)Whitten, A.J., Damanik, S.J., Anwar, J. and Hisyam, N. 1987. The Ecology of Sumatra. Gadjah Mada University Press, Yogyakarta.WWF. 1980. Saving Siberut: A conservation master plan. World Wildlife Fund Indonesia Programme.