Muong La Watershed Protection Forest

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Summary

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  • Western black crested gibbons (Nomascus concolor) are present in Muong La Watershed Protection Forest.
  • A minimum population of 6 groups was confirmed in 2010.
  • The gibbon population trend is decreasing.
  • The site has a total size of 30 km².
  • Key threats to gibbons are hunting, and habitat encroachment and degradation.
  • Conservation activities have focused on gun confiscation and community-based patrols supported by FFI.


Site characteristics

The site is located in Muong La District, Son La Province, Vietnam.

Table 1. Basic site information for Muong La Watershed Protection Forest

Species 'Nomascus concolor
Area 30 km²
Coordinates Lat: 21.557566 , Lon: 104.069738
Type of site Protected area
Habitat types Subtropical/tropical moist lowland forest
Type of governance

IUCN habitat categories Site designations

Ape status

The N. concolor population in Muong La Watershed Protection Forest was surveyed four times between 2000 and 2010, at the same time as surveys in Mu Cang Chai SHCA (Rawson et al. 2011). A 2010 survey recorded at least six gibbon groups and a minimum of 12 individuals, within a population of 20 groups including those in Mu Cang Chai SHCA (Le Trong Dat & Le Minh Phong 2010). This is significantly less than in 2008 (also six groups but with >17 individuals) and 2007 and 2006 (14 groups with >43 individuals), suggesting a decline (Rawson et al. 2011).

Table 2. Ape population estimates reported for Muong La Watershed Protection Forest

Species Year Total number indiv. (95% CI) Total number groups (95% CI) Density ​​[groups/km²​] (95% CI) Area Method Source Comments A.P.E.S. database ID NA NA
Nomascus concolor 2010 6 12 Muong La Watershed Protection Forest Fixed point triangulation Le Trong Dat & Le Minh Phong 2010

Threats

Hunting has been the main threat to gibbons at the site since the mid-2000s and it continues (Rawson et al. 2011). In January 2010 a hunter shot one male gibbon and sold it to a wildlife trader in Muong La Town for VND 1,800,000 (about US$ 90) and in September 2009, the same trader purchased two gibbon skins and skeletons from hunters (Le Trong Dat & Le Minh Phong 2010). The forest has been extensively logged for high value timber species such as Fokienia hodginsii both legally and illegally (Le Trong Dat & Le Minh Phong 2010). The watershed forest has also been cleared for agriculture and rubber plantations.

Table 3. Threats to apes reported for Muong La Watershed Protection Forest

Category Specific threats Threat level Description Year of threat
10 Geological events Absent
12 Other threat Absent
1 Residential & commercial development 1.1 Residential areas High (more than 70% of population affected) Housing construction due to displacement of communities due to dam construction (Rawson et al. 2011). Ongoing (2011)
2 Agriculture & aquaculture 2.1 Annual & perennial non-timber crops High (more than 70% of population affected) Forest cleared for agriculture and rubber plantations (Rawson et al. 2011). Ongoing (2011)
5 Biological resource use 5.1 Hunting & collecting terrestrial animals High (more than 70% of population affected) Hunting with guns (Le Trong Dat & Le Minh Phong 2010). Ongoing (2010)
5 Biological resource use 5.3 Logging & wood harvesting High (more than 70% of population affected) Legal and illegal selective logging for Fokienia hodginsii and clearance for agriculture (Le Trong Dat & Le Minh Phong 2010). Ongoing (2010)
7 Natural system modifications 7.2 Dams & water management/use High (more than 70% of population affected) Hydropower development has led to forest clearance in the inundation zone and displacement of communities, ultimately negatively impacting gibbon habitat (Rawson et al. 2011). Ongoing (2011)
3 Energy production & mining Unknown
4 Transportation & service corridors Unknown
6 Human intrusions & disturbance Unknown
8 Invasive & other problematic species, genes & diseases Unknown
9 Pollution Unknown
11 Climate change & severe weather Unknown

IUCN Threats list

Conservation activities

FFI established a community-based gibbon monitoring group in Muong La in 2004, similar to the model in Mu Cang Chai. These patrols continued until 2007 due to the end of project funding. In 2005, a gun confiscation and awareness campaign was conducted (1,800 guns were confiscated). The results of the gibbon survey in 2006 seemed to indicate that these conservation interventions were successful, although why it should be so with less intervention than in Mu Cang Chai remains unclear (Swan unpublished data; Rawson et al. 2011). A steep decline then appears to have occurred from 2007 when patrolling ceased and increased migration to the area occurred due to the hydropower development. The patrol group was re-established by FFI in 2010, but pressures remain high (Rawson et al. 2011).

Table 4. Conservation activities reported for Muong La Watershed Protection Forest

Category Specific activity Description Implementing organization(s) Year of activity
2 Counter-wildlife crime 2.12 Implement community control of patrolling, banning hunting and removing snares Community-based patrol (Rawson et al. 2011). Ongoing (2011)
5 Protection & restoration 5.2 Legally protect ape habitat Ongoing (2011)

Conservation activities list (Junker et al. 2017)

Challenges

Table 5. Challenges reported for Muong La Watershed Protection Forest

Challenges Specific challenges Source Year(s)
4 Institutional support 4.1 Lack of law enforcement Rawson et al. 2011

Enablers

Table 6. Enablers reported for Muong La Watershed Protection Forest

Enablers Specific enablers Source Year(s)
1 Site management
2 Resources and capacity
3 Engaged community
4 Institutional support
5 Ecological context
6 Safety and stability

Research activities

Documented behaviours

Table 7. Behaviours documented for Muong La Watershed Protection Forest

Behavior Source
Not reported

Exposure to climate change impacts

External links

[1]

Relevant datasets

References

Rawson, B. M, Insua-Cao, P., Nguyen Manh Ha, Van Ngoc Thinh, Hoang Minh Duc, Mahood, S., Geissmann, T. and Roos, C. 2011. The Conservation Status of Gibbons in Vietnam. Fauna & Flora International/Conservation International, Hanoi, Vietnam.

Le Trong Dat, and Le Minh Phong. 2010. 2010 census of western black crested gibbon Nomascus concolor in Mu Cang Chai Species/Habitat Conservation Area (Yen Bai Province) and adjacent forests in Muong La District (Son La Province). Fauna & Flora International Vietnam Programme, Hanoi, Vietnam.


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