Ban Bung (12031)
Vietnam, Asia
Site overview
KBA status: confirmed
Year of last assessment: 2012
National site name: Ban Bung
Central coordinates: Latitude: 22.3167, Longitude: 105.4667
System: terrestrial
Elevation (m): 300 to 980
Area of KBA (km2): 93.15148
Protected area coverage (%): 73.78
KBA classification: Global/Regional TBD
Legacy site: Yes
Site details
Site description: Ban Bung is the southern sector of Na Hang proposed nature reserve. The topography of the site is characterised by steep, rugged limestone hills.
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) The site has been reviewed and re-confirmed as a KBA in the process of compiling the revised 2011 CEPF Ecosystem Profile for the Indo-Burma Hotspot.
Additional biodiversity: Non-bird biodiversity: Ban Bung, together with Tat Ke, the southern sector of Na Hang, is of particular importance for the conservation of globally threatened primate species. Na Hang is one of only a handful of sites in Vietnam to support Tonkin Snub-nosed Monkey Pygathrix avunculus, and may support the largest population. The globally vulnerable Francois' Leaf Monkey Trachypithecus francoisi francoisi has also been provisionally recorded at Na hang Nature Reserve. Two other globally threatened species, Podocarpus neriifolium and Southern Serow Naemorhedus sumatraensis, have been recorded at the site by Hill and Kemp (1996) and Boonratana (1998).
Habitats
Summary of habitats in KBA: The natural vegetation of Ban Bung is dominated by limestone forest, with smaller areas of various lowland evergreen and lower montane evergreen forest sub-types. Over 2,000 plant species have been identified at Na Hang proposed nature reserve (McNab et al., 2000), including several species listed in the Red Data Book of Vietnam, such as Garcinia fragraeoides, Dacrydium pierrei and Manglietia fordiana (Hill and Kemp, 1996).About 70% of the natural vegetation cover of Ban Bung is limestone forest although smaller areas of various lowland evergreen and lower montane evergreen forest sub-types also occur. Most of the forest at Ban Bung is distributed on hill slopes, and the montane soils in these areas are highly susceptible to erosion. In some places within the site, forest loss has led to landslides and gullying. Forest at Ban Bung, therefore, plays a valuable role in preventing soil erosion and protecting the water supplies of downstream communities.
Land use: agriculture (15%) | not utilised (85%)
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Shrubland | 15 | |
| Forest | 70 | |
| Artificial - Terrestrial | 15 |
Threats
Summary of threats to biodiversity at KBA: The main threats to biodiversity at the site are shifting cultivation practices, over-exploitation of forest products and hunting.
| Threat level 1 | Threat level 2 | Threat level 3 | Timing |
|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops | Shifting agriculture | Ongoing |
| Biological resource use | Hunting & collecting terrestrial animals | Unintentional effects (species being assessed is not the target) | Ongoing |
| Biological resource use | Logging & wood harvesting | Unintentional effects: subsistence/small scale (species being assessed is not the target) [harvest] | Ongoing |
| Biological resource use | Gathering terrestrial plants | Unintentional effects (species being assessed is not the target) | Ongoing |
| Human intrusions & disturbance | Work & other activities | Only in the future |
Additional information
References: BirdLife International and the Forest Inventory and Planning Institute (2001) Sourcebook of existing and proposed protected areas in Vietnam. Hanoi, Vietnam: BirdLife International Vietnam Programme and the Forest Inventory and Planning Institute.Boonratana, R. (1998) Na Hang Rainforest Conservation Project. Hanoi: Fauna and Flora International-Indochina Programme.Hill, M. and Kemp, N. (1996) Biological Survey of Na Hang Nature Reserve, Tuyen Quang province, Vietnam: Part 1, Ban Bung sector. London: Society for Environmental Exploration.McNab, A., Vo Tri Chung and Nguyen Huu Hong (2000) River Gam dam preliminary environmental impact assessment. Hanoi: Scott Wilson, Asia-Pacific Ltd.Robson, C. (2000) A field guide to the birds of Thailand and south-east Asia. London: New Holland.