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Summary

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Northern white-cheeked gibbons (Nomascus leucogenys) are present in Huong Son Forest.
It has been estimated that a minimum of 3 groups occur in the site.
The gibbon population trend is unknown.
The site has a total size of 300 km².
Key threats to gibbons are hunting and logging.
Conservation activities are not documented.

Site characteristics

The site is located in north-central Vietnam, in the province of Ha Tinh. Part of the site is managed by the Huong Son State Forest Company, and the other part is designated as the ‘Ngan Pho River Protection Forest’ (Rawson et al. 2011).

Table 1. Basic site information for Huong Son Forest

Species	Nomascus leucogenys
Area	300 km²
Coordinates	Lat: 18.522052 , Lon: 105.244000
Type of site	Logging concession
Habitat types	Agricultural land, Subtropical/tropical moist lowland forest
Type of governance

Types of sites Governance types Habitat types

Ape status

A 2011 survey confirmed at least three gibbon groups in Son Kim 2 Commune and one group in Song Hon Commune, and according to interviews, a few groups are found in the border area with Laos. In the late 1990s and early 2000s gibbons were recorded on several occasions (Rawson et al. 2011).

Table 2. Ape population estimates reported for Huong Son Forest

Species	Year	Total number groups (95% CI)	Density [groups/km²] (95% CI)	Total number indiv. (95% CI)	Area	Method	Source	Comments	A.P.E.S. database ID
Nomascus leucogenys	2011		3		Huong Son Forest	Unknown	Nguyen Manh Ha et al. 2011

Sampling methods Analytical frameworks

Threats

In 2010, Hương Sơn had 74.6kha of natural forest, extending over 76% of its land area. In 2021, it lost 679ha of natural forest, equivalent to 352kt of CO₂ emissions (Global Forest Watch).

Table 3. Threats to apes reported for Huong Son Forest

Category	Specific threats	Threat level	Description	Year of threat
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	High (more than 70% of population affected)	Hunting and capturing.	Ongoing (2011)
5 Biological resource use	5.3 Logging & wood harvesting	High (more than 70% of population affected)	Extensive commercial logging and illegal logging (Rawson et al. 2011).	Ongoing (2011)

Threats

Conservation activities

Challenges

Table 5. Challenges reported for Huong Son Forest

Challenges	Specific challenges	Source	Year(s)
	Not reported

Challenges

Enablers

Table 6. Enablers reported for Huong Son 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

Enablers

Research activities

Documented behaviours

Table 7. Behaviours documented for Huong Son Forest

Category	Behavior	Observation type	Prevalence	Observation dates	Source	Habituation	Species	Comment
	Not reported

Behaviours

Exposure to climate change impacts

External links

References

Nguyen, M. H., Do, T., & Le, V. D. (2011). [Survey of white-cheeked gibbons (Nomascus leucogenys) in Vu Quang National Park and Huong Son Forestry Company, Ha Tinh]. Centre for Natural Resources and Environmental Studies (CRES), Hanoi, Vietnam (in Vietnamese).

Rawson, B. M., Insua-Cao, P., Nguyen, M. H., Van, N. T., Hoang, M. D., Mahood, S., …, & Roos, C. (2011). The Conservation Status of Gibbons in Vietnam. Hanoi, Viet Nam: Fauna & Flora International (FFI) and Conservation International. link

Page created by: APES Atlas Team Date: 2023-05-05

@@ Line 13: / Line 13: @@
 * Key threats to gibbons are hunting and logging.
 * Conservation activities are not documented.
 = Site characteristics =
-The site is located in north-central Vietnam, in the province of Ha Tinh. Part of the site is managed by the Huong Son State Forest Company, and the other part is designated as the ‘Ngan Pho River Protection Forest’ (Rawson et al. 2011).
+The site is located in north-central Vietnam, in the province of Ha Tinh. Part of the site is managed by the Huong Son State Forest Company, and the other part is designated as the ‘Ngan Pho River Protection Forest’ ([[#R00753|Rawson et al. 2011]]).
 '''Table 1. Basic site information for Huong Son Forest'''
@@ Line 46: / Line 42: @@
 = Ape status =
-A 2011 survey confirmed at least three gibbon groups in Son Kim 2 Commune and one group in Song Hon Commune, and according to interviews, a few groups are found in the border area with Laos. In the late 1990s and early 2000s gibbons were recorded on several occasions (Rawson et al. 2011).
+A 2011 survey confirmed at least three gibbon groups in Son Kim 2 Commune and one group in Song Hon Commune, and according to interviews, a few groups are found in the border area with Laos. In the late 1990s and early 2000s gibbons were recorded on several occasions ([[#R00753|Rawson et al. 2011]]).
 '''Table 2. Ape population estimates reported for Huong Son Forest'''
@@ Line 68: / Line 64: @@
 |Huong Son Forest
 |Unknown
-|Nguyen Manh Ha et al. 2011
+|[[#R00752|Nguyen Manh Ha et al. 2011]]
 |
 |
@@ Line 95: / Line 91: @@
 |5.3 Logging & wood harvesting
 |High (more than 70% of population affected)
-|Extensive commercial logging and illegal logging (Rawson et al. 2011).
+|Extensive commercial logging and illegal logging ([[#R00753|Rawson et al. 2011]]).
 |Ongoing (2011)
 |}
@@ Line 207: / Line 203: @@
 = References =
-Nguyen Manh Ha, Do Tuoc, and Le Van Dung (2011). [Survey of white-cheeked gibbons (Nomascus leucogenys) in Vu Quang National Park and Huong Son Forestry Company, Ha Tinh]. Centre for Natural Resources and Environmental Studies (CRES), Hanoi, Vietnam (in Vietnamese).
+<span id="R00752"></span>Nguyen, M. H., Do, T., & Le, V. D. (2011). [Survey of white-cheeked gibbons (Nomascus leucogenys) in Vu Quang National Park and Huong Son Forestry Company, Ha Tinh]. Centre for Natural Resources and Environmental Studies (CRES), Hanoi, Vietnam (in Vietnamese).
-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.
+<span id="R00753"></span>Rawson, B. M., Insua-Cao, P., Nguyen, M. H., Van, N. T., Hoang, M. D., Mahood, S., …, & Roos, C. (2011). The Conservation Status of Gibbons in Vietnam. Hanoi, Viet Nam: Fauna & Flora International (FFI) and Conservation International. [http://www.gibbons.de/main/books/2011gibbons-vietnam.pdf link]
 '''Page created by: '''APES Atlas Team''' Date:''' 2023-05-05