Rawa Pesisir Pantai Barat Tapanuli Selatan (Angkola) (15817)
Indonesia, Asia
Site overview
KBA status: confirmed
Year of last assessment: 2006
National site name: Rawa Pesisir Pantai Barat Tapanuli Selatan (Angkola)
Central coordinates: Latitude: 1.2833, Longitude: 98.9000
System: marine, terrestrial
Area of KBA (km2): 1284.47634
Protected area coverage (%): 0.10
KBA classification: Global/Regional TBD
Legacy site: Yes
Site details
Site description: The important site in this area are swamps in estuary of Batang Toru River (also known as Rawa Lumut), with total area around 55000 ha, Rawa Batang Gadis (32000 ha), also including Siais Lake in opened swamp, and swamp around Natal (39000 ha) in the northern part.
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: This area is selected as important bird area because of the existence of White-winged Duck Cairina scutulata that recorded for the first time in northwest Sumatra in 1990 (Holmes 1990). Survey by Wibowo et.al. (1999) in Rawa Lumut found this bird, and it is estimated at least 5 birds of White-winged Duck present. Survey on the other locations in this area i.e.Danobirong Lake, Rawa Batang Gadis and Siais Lake couldn't find White-winged Duck Cairina scutulata (Wibowo et.al. 1999). Survey in Pandan Lake found 2-3 White-winged Duck (Hasudungan & Wibowo 2000) Non-bird biodiversity: Other biodiversity include Prebytis cristata, Presbytis melanolophos, Hylobathes syndactilus, and Pongo pygmaeus (reported by local communities) (Giesen & van Balen 1992, Wibowo et.al. 1999).
Habitats
Summary of habitats in KBA: Peat swamp forest (20%), permanent freshwater swamps (20%), freshwater lake (Danau Siais, 5%) and rice field .Land use:Plantation/Agriculture (55%), forestry area (20%) and remaining area unknown (Silvius et.al. 1987, Giesen & van Balen 1992, Wibowo et.al. 1999).
Land use: agriculture (55%) | forestry
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Wetlands(Inland) | 40 | |
| Forest | 20 | |
| Artificial - Terrestrial | 40 |
Threats
Summary of threats to biodiversity at KBA: Logging, drainage, infrastructure development and land clearing for agriculture (Wibowo et.al. 1999).
Additional information
References: Giesen, W. and van Balen, S. 1992. Several short surveys of Sumatran wetlands. Notes and observation. PHPA/AWB Sumatra Wetland Project Report No. 26. Bogor.Hasudungan, F. & Wibowo, P. 2000. Mentok Rimba (Cairina scutulata) di Propinsi Sumatra Utara. Wetlands International Indonesia Programme-PKA, Bogor.Holmes, D.A. 1990. Notes on the occurrence of the White-winged Duck Cairina scutulata on the west coast of North Sumatra. Kukila 5(1): 69-72.Silvius, M.J., Steeman, A.P.J.M., Berczy, E.T., Djuharsa, E. and Taufik, A.W. 1987. The Indonesian Wetland Inventory. A preliminary compilation of existing information on wetlands of Indonesia. PHPA, AWB/INTERWADER, EDWIN, Bogor, Indonesia.Wibowo, P., Hasudungan, F., and Syah, R. 1999. White-winged Duck Survey (Cairina scutulata) in North Sumatera. A Survey Report Based on White-winged Duck Wide-Survey in North Sumatera, July-Agust 1999. Wetlands International-IP/PKA, Bogor.