Dong Nai Nature Reserve: Difference between revisions
Created page with "Asia > Vietnam > Dong Nai Nature Reserve '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dong_Nai_Nature_Reserve?_x_tr_sl=auto&_x_tr_tl=fr&_x_tr_hl=en&_x_tr_pto=wapp Français]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dong_Nai_Nature_Reserve?_x_tr_sl=auto&_x_tr_tl=pt&_x_tr_hl=en&_x_tr_pto=wapp Português]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dong_Nai_Nature_Reserve?_x_tr_sl=aut..." |
No edit summary |
||
| (4 intermediate revisions by the same user not shown) | |||
| Line 13: | Line 13: | ||
* Key threats to gibbons are hunting, logging, roads and agricultural encroachment. | * Key threats to gibbons are hunting, logging, roads and agricultural encroachment. | ||
* Conservation activities include a trial for establishing another gibbon population in the reserve. | * Conservation activities include a trial for establishing another gibbon population in the reserve. | ||
= Site characteristics = | = Site characteristics = | ||
Dong Nai Nature Reserve is located in the Dong Nai Province, Vietnam. Dong Nai Nature Reserve is one of the most important conservation areas in Vietnam as the site contains a high biodiversity richness. The landscape of the nature reserve is dominated by lowland semi evergreen forest, and the elevation ranges from 100 to 340 m above sea level. The reserve is one of the most important strategic watershed forests of the Dong Nai River and Tri An hydropower dam which provides drinking water for the second most populated and industrial area of Vietnam (Nguyen Manh Ha et al. 2010). | Dong Nai Nature Reserve is located in the Dong Nai Province, Vietnam. Dong Nai Nature Reserve is one of the most important conservation areas in Vietnam as the site contains a high biodiversity richness. The landscape of the nature reserve is dominated by lowland semi evergreen forest, and the elevation ranges from 100 to 340 m above sea level. The reserve is one of the most important strategic watershed forests of the Dong Nai River and Tri An hydropower dam which provides drinking water for the second most populated and industrial area of Vietnam ([[#R02075|Nguyen Manh Ha et al. 2010]]). | ||
'''Table 1. Basic site information for Dong Nai Nature Reserve''' | '''Table 1. Basic site information for Dong Nai Nature Reserve''' | ||
| Line 46: | Line 42: | ||
= Ape status = | = Ape status = | ||
Surveys in 2010 recorded 15 groups of ''N. gabriellae'' with at least 31 individuals, including 13 males, 10 females and 8 juveniles, identified by their distinctive calls (Nguyen Manh Ha et al. 2010). In total, 69 survey days were spent surveying 34 listening posts and 34 transects. Gibbons have been extirpated in some parts of the reserve, probably due to intensive hunting and logging over the past few decades. Most gibbons persist in areas close to Cat Tien National Park, and this is probably due to better habitat and protection spill-over from the park (Nguyen Manh Ha et al. 2010). | Surveys in 2010 recorded 15 groups of ''N. gabriellae'' with at least 31 individuals, including 13 males, 10 females and 8 juveniles, identified by their distinctive calls ([[#R02075|Nguyen Manh Ha et al. 2010]]). In total, 69 survey days were spent surveying 34 listening posts and 34 transects. Gibbons have been extirpated in some parts of the reserve, probably due to intensive hunting and logging over the past few decades. Most gibbons persist in areas close to Cat Tien National Park, and this is probably due to better habitat and protection spill-over from the park ([[#R02075|Nguyen Manh Ha et al. 2010]]). | ||
'''Table 2. Ape population estimates reported for Dong Nai Nature Reserve''' | '''Table 2. Ape population estimates reported for Dong Nai Nature Reserve''' | ||
| Line 65: | Line 61: | ||
| | | | ||
|15 | |15 | ||
|31 | |31.0 | ||
|Vinh An area, Ma Da sector, Hieu Liem sector of the reserve, approx. 200 km2 | |Vinh An area, Ma Da sector, Hieu Liem sector of the reserve, approx. 200 km2 | ||
|Fixed point triangulation, Line transects, Interviews | |Fixed point triangulation, Line transects, Interviews | ||
|Nguyen Manh Ha et al. 2010 | |[[#R02075|Nguyen Manh Ha et al. 2010]] | ||
|Minimum of 17 groups and 31 individuals. | |Minimum of 17 groups and 31 individuals. | ||
| | | | ||
| Line 76: | Line 72: | ||
= Threats = | = Threats = | ||
Hunting and logging are the key threats to ''N. gabriellae'' in this reserve; gibbons are still often sourced for the wildlife trade from this location, with an estimated minimum of five animals traded per year (Rawson et al. 2011). Forest quality is poor in areas previously logged. Several roads bisect the site and agricultural encroachment is occurring along these (Nguyen Manh Ha et al. 2010). | Hunting and logging are the key threats to ''N. gabriellae'' in this reserve; gibbons are still often sourced for the wildlife trade from this location, with an estimated minimum of five animals traded per year ([[#R00520|Rawson et al. 2011]]). Forest quality is poor in areas previously logged. Several roads bisect the site and agricultural encroachment is occurring along these ([[#R02075|Nguyen Manh Ha et al. 2010]]). | ||
'''Table 3. Threats to apes reported for Dong Nai Nature Reserve''' | '''Table 3. Threats to apes reported for Dong Nai Nature Reserve''' | ||
| Line 85: | Line 81: | ||
!Description | !Description | ||
!Year of threat | !Year of threat | ||
|- | |||
|2 Agriculture & aquaculture | |||
|2.1 Annual & perennial non-timber crops | |||
|High (more than 70% of population affected) | |||
|Agricultural encroachment ([[#R00520|Rawson et al. 2011]]). | |||
|Ongoing (2011) | |||
|- | |- | ||
|4 Transportation & service corridors | |4 Transportation & service corridors | ||
|4.1 Roads & railroads | |4.1 Roads & railroads | ||
|High (more than 70% of population affected) | |High (more than 70% of population affected) | ||
|Several roads bisect the site, driving further habitat destruction (Nguyen Manh Ha et al. 2010). | |Several roads bisect the site, driving further habitat destruction ([[#R02075|Nguyen Manh Ha et al. 2010]]). | ||
|Ongoing (2010) | |Ongoing (2010) | ||
|- | |- | ||
|5 Biological resource use | |5 Biological resource use | ||
|5.1 Hunting & collecting terrestrial animals | |5.1 Hunting & collecting terrestrial animals | ||
|High (more than 70% of population affected) | |High (more than 70% of population affected) | ||
|Illegal hunting with guns (Rawson et al. 2011). | |Illegal hunting with guns ([[#R00520|Rawson et al. 2011]]). | ||
|Ongoing (2011) | |Ongoing (2011) | ||
|- | |- | ||
| Line 107: | Line 103: | ||
|5.3 Logging & wood harvesting | |5.3 Logging & wood harvesting | ||
|High (more than 70% of population affected) | |High (more than 70% of population affected) | ||
|Illegal logging (Rawson et al. 2011). | |Illegal logging ([[#R00520|Rawson et al. 2011]]). | ||
|Ongoing (2011) | |Ongoing (2011) | ||
|} | |} | ||
| Line 114: | Line 110: | ||
= Conservation activities = | = Conservation activities = | ||
In August 2011, two groups of gibbons were released into this reserve and monitored to assess whether more gibbons could be introduced here from the Dao Tien Rescue Centre with the aim of establishing another gibbon population (Rawson et al. 2011). | In August 2011, two groups of gibbons were released into this reserve and monitored to assess whether more gibbons could be introduced here from the Dao Tien Rescue Centre with the aim of establishing another gibbon population ([[#R00520|Rawson et al. 2011]]). | ||
'''Table 4. Conservation activities reported for Dong Nai Nature Reserve''' | '''Table 4. Conservation activities reported for Dong Nai Nature Reserve''' | ||
| Line 123: | Line 119: | ||
!Implementing organization(s) | !Implementing organization(s) | ||
!Year of activity | !Year of activity | ||
|- | |||
|5 Protection & restoration | |||
|5.2 Legally protect ape habitat | |||
| | |||
| | |||
|2004-Ongoing (2026) | |||
|- | |- | ||
|6 Species management | |6 Species management | ||
|6.8 Reintroduction of apes (captively-bred or rehabilitated indviduals) | |6.8 Reintroduction of apes (captively-bred or rehabilitated indviduals) | ||
|Two gibbons groups introduced into the reserve (Rawson et al. 2011). | |Two gibbons groups introduced into the reserve ([[#R00520|Rawson et al. 2011]]). | ||
| | | | ||
|2011 | |2011 | ||
|} | |} | ||
| Line 241: | Line 237: | ||
= References = | = References = | ||
Nguyen Manh Ha, Nguyen Hoang Hao, Tran Duc Dung, Nguyen Manh Diep, Pham Van Nong, Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam. Fauna & Flora International/Conservation International, Hanoi, Vietnam. | <span id="R00519"></span>Nguyen Manh Ha, Nguyen Hoang Hao, Tran Duc Dung, Nguyen Manh Diep, Pham Van Nong, Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam. Fauna & Flora International/Conservation International, Hanoi, Vietnam. | ||
<span id="R00520"></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] | |||
<span id="R02075"></span>Nguyen, M. H., Do, T., Nguyen, Q. T., Nguyen, M. C., Le, V. D., & Luu, T. B. (2010). Report of white-cheeked crested gibbon (Nomascus leucogenys) survey in Muong Nhe Nature Reserve, Dien Bien Province, Vietnam. Fauna & Flora International and Conservation International, Hanoi, Vietnam. | |||
'''Page created by: '''APES Atlas Team''' Date:''' 2023-04-03 | '''Page created by: '''APES Atlas Team''' Date:''' 2023-04-03 | ||
Latest revision as of 16:27, 12 October 2026
Asia > Vietnam > Dong Nai Nature Reserve
Français | Português | Español | Bahasa Indonesia | Melayu
Summary
- Yellow-cheeked gibbons (Nomascus gabriellae) are present in Dong Nai Nature Reserve.
- A minimum of 17 groups were estimated to inhabit the site in 2010.
- The gibbon population trend is unknown.
- The site has a total size of 100,303 hectares (including 32,400 ha of Tri An Reservoir).
- Key threats to gibbons are hunting, logging, roads and agricultural encroachment.
- Conservation activities include a trial for establishing another gibbon population in the reserve.
Site characteristics
Dong Nai Nature Reserve is located in the Dong Nai Province, Vietnam. Dong Nai Nature Reserve is one of the most important conservation areas in Vietnam as the site contains a high biodiversity richness. The landscape of the nature reserve is dominated by lowland semi evergreen forest, and the elevation ranges from 100 to 340 m above sea level. The reserve is one of the most important strategic watershed forests of the Dong Nai River and Tri An hydropower dam which provides drinking water for the second most populated and industrial area of Vietnam (Nguyen Manh Ha et al. 2010).
Table 1. Basic site information for Dong Nai Nature Reserve
| Species | Nomascus gabriellae |
| Area | 100 km² |
| Coordinates | Lat: 11.405678 , Lon: 107.232591 |
| Type of site | Protected area (Nature Reserve) |
| Habitat types | Subtropical/tropical moist lowland forest |
| Type of governance |
Types of sites Governance types Habitat types
Ape status
Surveys in 2010 recorded 15 groups of N. gabriellae with at least 31 individuals, including 13 males, 10 females and 8 juveniles, identified by their distinctive calls (Nguyen Manh Ha et al. 2010). In total, 69 survey days were spent surveying 34 listening posts and 34 transects. Gibbons have been extirpated in some parts of the reserve, probably due to intensive hunting and logging over the past few decades. Most gibbons persist in areas close to Cat Tien National Park, and this is probably due to better habitat and protection spill-over from the park (Nguyen Manh Ha et al. 2010).
Table 2. Ape population estimates reported for Dong Nai Nature Reserve
| 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 gabriellae | 2010 | 15 | 31.0 | Vinh An area, Ma Da sector, Hieu Liem sector of the reserve, approx. 200 km2 | Fixed point triangulation, Line transects, Interviews | Nguyen Manh Ha et al. 2010 | Minimum of 17 groups and 31 individuals. |
Sampling methods Analytical frameworks
Threats
Hunting and logging are the key threats to N. gabriellae in this reserve; gibbons are still often sourced for the wildlife trade from this location, with an estimated minimum of five animals traded per year (Rawson et al. 2011). Forest quality is poor in areas previously logged. Several roads bisect the site and agricultural encroachment is occurring along these (Nguyen Manh Ha et al. 2010).
Table 3. Threats to apes reported for Dong Nai Nature Reserve
| Category | Specific threats | Threat level | Description | Year of threat |
|---|---|---|---|---|
| 2 Agriculture & aquaculture | 2.1 Annual & perennial non-timber crops | High (more than 70% of population affected) | Agricultural encroachment (Rawson et al. 2011). | Ongoing (2011) |
| 4 Transportation & service corridors | 4.1 Roads & railroads | High (more than 70% of population affected) | Several roads bisect the site, driving further habitat destruction (Nguyen Manh Ha et al. 2010). | Ongoing (2010) |
| 5 Biological resource use | 5.1 Hunting & collecting terrestrial animals | High (more than 70% of population affected) | Illegal hunting with guns (Rawson et al. 2011). | Ongoing (2011) |
| 5 Biological resource use | 5.3 Logging & wood harvesting | High (more than 70% of population affected) | Illegal logging (Rawson et al. 2011). | Ongoing (2011) |
Conservation activities
In August 2011, two groups of gibbons were released into this reserve and monitored to assess whether more gibbons could be introduced here from the Dao Tien Rescue Centre with the aim of establishing another gibbon population (Rawson et al. 2011).
Table 4. Conservation activities reported for Dong Nai Nature Reserve
| Category | Specific activity | Description | Implementing organization(s) | Year of activity |
|---|---|---|---|---|
| 5 Protection & restoration | 5.2 Legally protect ape habitat | 2004-Ongoing (2026) | ||
| 6 Species management | 6.8 Reintroduction of apes (captively-bred or rehabilitated indviduals) | Two gibbons groups introduced into the reserve (Rawson et al. 2011). | 2011 |
Challenges
Table 5. Challenges reported for Dong Nai Nature Reserve
| Challenges | Specific challenges | Source | Year(s) |
|---|---|---|---|
| Not reported |
Enablers
Table 6. Enablers reported for Dong Nai Nature Reserve
| 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 Dong Nai Nature Reserve
| Category | Behavior | Observation type | Prevalence | Observation dates | Source | Habituation | Species | Comment |
|---|---|---|---|---|---|---|---|---|
| Not reported |
Exposure to climate change impacts
External links
References
Nguyen Manh Ha, Nguyen Hoang Hao, Tran Duc Dung, Nguyen Manh Diep, Pham Van Nong, Report of yellow-cheeked crested gibbon (Nomascus gabriellae) survey in Dong Nai Nature Reserve, Dong Nai province, Vietnam. Fauna & Flora International/Conservation International, Hanoi, Vietnam.
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
Nguyen, M. H., Do, T., Nguyen, Q. T., Nguyen, M. C., Le, V. D., & Luu, T. B. (2010). Report of white-cheeked crested gibbon (Nomascus leucogenys) survey in Muong Nhe Nature Reserve, Dien Bien Province, Vietnam. Fauna & Flora International and Conservation International, Hanoi, Vietnam.
Page created by: APES Atlas Team Date: 2023-04-03