Dakrong Nature Reserve - Revision history

WikiEdit at 20:27, 12 October 2026

2026-10-12T20:27:11Z

← Older revision		Revision as of 16:27, 12 October 2026
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	= Site characteristics =		= Site characteristics =

	Located in Quang Tri Province, in the center part of the Annamite Mountain Range, Vietnam, the Dakrong Nature Reserve was established in 2001(Vu & Doherty 2021). Approximately half the area is covered by rich and medium evergreen forest; the rest is covered by poor, regrowth forest, plantations, or bare land. The terrain of the reserve consists of low and medium hills, with the highest peak reaching 1410 m above sea level (Vu & Doherty 2021).		Located in Quang Tri Province, in the center part of the Annamite Mountain Range, Vietnam, the Dakrong Nature Reserve was established in 2001([[#R00426\|Vu & Doherty 2021]]). Approximately half the area is covered by rich and medium evergreen forest; the rest is covered by poor, regrowth forest, plantations, or bare land. The terrain of the reserve consists of low and medium hills, with the highest peak reaching 1410 m above sea level ([[#R00426\|Vu & Doherty 2021]]).

	'''Table 1. Basic site information for Dakrong Nature Reserve'''		'''Table 1. Basic site information for Dakrong Nature Reserve'''
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	= Ape status =		= Ape status =

	The northern yellow-cheeked crested gibbon only occurs in the Central Annamite mountain range along the borders of Vietnam and Laos, and Vietnam and Cambodia. No complete survey for the species has been conducted (Vu & Doherty 2021). A survey was conducted in the reserve in 2019 using passive acoustic monitoring. Gibbon calls were detected in 39 out of 95 recording sites (Vu & Doherty 2021). Assuming a 600 m detection distance, the model-averaged occurrence probability for the nature reserve was 0.44 (SE=0.06). The area of rich and medium evergreen forests within a km of the recording posts was the most important predictor of occurrence (positively correlated). Detection probability was estimated to be 0.52 (SE=0.04) per day (Vu & Doherty 2021).		The northern yellow-cheeked crested gibbon only occurs in the Central Annamite mountain range along the borders of Vietnam and Laos, and Vietnam and Cambodia. No complete survey for the species has been conducted ([[#R00426\|Vu & Doherty 2021]]). A survey was conducted in the reserve in 2019 using passive acoustic monitoring. Gibbon calls were detected in 39 out of 95 recording sites ([[#R00426\|Vu & Doherty 2021]]). Assuming a 600 m detection distance, the model-averaged occurrence probability for the nature reserve was 0.44 (SE=0.06). The area of rich and medium evergreen forests within a km of the recording posts was the most important predictor of occurrence (positively correlated). Detection probability was estimated to be 0.52 (SE=0.04) per day ([[#R00426\|Vu & Doherty 2021]]).

	'''Table 2. Ape population estimates reported for Dakrong Nature Reserve'''		'''Table 2. Ape population estimates reported for Dakrong Nature Reserve'''
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	\|Dakrong Nature Reserve		\|Dakrong Nature Reserve
	\|Passive acoustic monitoring		\|Passive acoustic monitoring
	\|Vu & Doherty 2021		\|[[#R00426\|Vu & Doherty 2021]]
	\|		\|
	\|		\|
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	= Threats =		= Threats =

	Most hunters active in the region are thought to come from other provinces, more than 100 km away from the reserve. Similar to other studies, a 2021 study showed a higher occupancy of gibbons in high vs low quality forest (Vu & Doherty 2021). Generally, northern yellow‐cheeked gibbon populations have dramatically decreased in Vietnam due to hunting, habitat loss, and the wildlife trade. The site has been selectively logged in the past, and timber and NTFP exploitation still occurs in the reserve. In addition, local communities live in villages near the nature reserve boundary (Vu & Doherty 2021).		Most hunters active in the region are thought to come from other provinces, more than 100 km away from the reserve. Similar to other studies, a 2021 study showed a higher occupancy of gibbons in high vs low quality forest ([[#R00426\|Vu & Doherty 2021]]). Generally, northern yellow‐cheeked gibbon populations have dramatically decreased in Vietnam due to hunting, habitat loss, and the wildlife trade. The site has been selectively logged in the past, and timber and NTFP exploitation still occurs in the reserve. In addition, local communities live in villages near the nature reserve boundary ([[#R00426\|Vu & Doherty 2021]]).

	'''Table 3. Threats to apes reported for Dakrong Nature Reserve'''		'''Table 3. Threats to apes reported for Dakrong Nature Reserve'''
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	\|5.1 Hunting & collecting terrestrial animals		\|5.1 Hunting & collecting terrestrial animals
	\|Present (unknown severity)		\|Present (unknown severity)
	\|Signs of wildlife hunting and trappings are recorded in the nature reserve (Vu & Doherty 2021).		\|Signs of wildlife hunting and trappings are recorded in the nature reserve ([[#R00426\|Vu & Doherty 2021]]).
	\|Ongoing (2021)		\|Ongoing (2021)
	\|-		\|-
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	\|5.2 Gathering terrestrial plants		\|5.2 Gathering terrestrial plants
	\|Present (unknown severity)		\|Present (unknown severity)
	\|Illegal exploitation of non-timber forest products (Vu & Doherty 2021).		\|Illegal exploitation of non-timber forest products ([[#R00426\|Vu & Doherty 2021]]).
	\|Ongoing (2021)		\|Ongoing (2021)
	\|-		\|-
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	\|5.3 Logging & wood harvesting		\|5.3 Logging & wood harvesting
	\|Present (unknown severity)		\|Present (unknown severity)
	\|Illegal timber exploitation, in the past and ongoing (Vu & Doherty 2021).		\|Illegal timber exploitation, in the past and ongoing ([[#R00426\|Vu & Doherty 2021]]).
	\|Ongoing (2021)		\|Ongoing (2021)
	\|-		\|-
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	\|9.2 Industrial & military effluents		\|9.2 Industrial & military effluents
	\|Medium (30-70% of population affected)		\|Medium (30-70% of population affected)
	\|Forest cover has been reduced by the spraying of chemical defoliants during the Second Indochina War (BirdLife International 2022).		\|Forest cover has been reduced by the spraying of chemical defoliants during the Second Indochina War ([[#R00425\|BirdLife International 2022]]).
	\|1955-1975		\|1955-1975
	\|}		\|}
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	= References =		= References =

	BirdLife International. (2022). Important Bird Areas factsheet: Dakrong. Retrieved from http://www.birdlife.org on 31 January 2022. ~~<br>~~		<span id="R00425"></span>BirdLife International. (2022). Important Bird Areas factsheet: Dakrong. Retrieved from http://www.birdlife.org on 31 January 2022.

	Vu, T. T., & Doherty, P. F. (2021). Using bioacoustics to monitor gibbons. Biodiversity and Conservation, 30(4), ~~1189–1198~~. https://doi.org/10.1007/s10531-021-02139-1 ~~<br>~~		<span id="R00426"></span>Vu, T. T., & Doherty, P. F. (2021). Using bioacoustics to monitor gibbons. ''Biodiversity and Conservation'', 30(4), 1189-1198. [https://doi.org/10.1007/s10531-021-02139-1 doi:10.1007/s10531-021-02139-1]



	'''Page created by: '''APES Atlas Team''' Date:''' 2022-01-28		'''Page created by: '''APES Atlas Team''' Date:''' 2022-01-28

WikiEdit at 14:44, 1 September 2026

2026-09-01T14:44:35Z

← Older revision		Revision as of 10:44, 1 September 2026
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	= References =		= References =

	BirdLife International (2022) Important Bird Areas factsheet: Dakrong. ~~Downloaded~~ from http://www.birdlife.org on 31~~/01/~~2022.		BirdLife International. (2022). Important Bird Areas factsheet: Dakrong. Retrieved from http://www.birdlife.org on 31 January 2022. <br>

	Vu, T. T., & Doherty, P. F. (2021). Using bioacoustics to monitor gibbons. Biodiversity and Conservation, 30(4), ~~1189-1198~~. https://~~link~~.~~springer.com/article~~/10.1007/s10531-021-02139-1		Vu, T. T., & Doherty, P. F. (2021). Using bioacoustics to monitor gibbons. Biodiversity and Conservation, 30(4), 1189–1198. https://doi.org/10.1007/s10531-021-02139-1 <br>



	'''Page created by: '''APES Atlas Team''' Date:''' 2022-01-28		'''Page created by: '''APES Atlas Team''' Date:''' 2022-01-28

WikiEdit at 14:42, 25 March 2026

2026-03-25T14:42:51Z

← Older revision		Revision as of 10:42, 25 March 2026
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	* Key threats to gibbons are illegal logging and exploitation of non-timber forest products.		* Key threats to gibbons are illegal logging and exploitation of non-timber forest products.
	* Conservation activities are not documented.		* Conservation activities are not documented.





	= Site characteristics =		= Site characteristics =
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	!Description		!Description
	!Year of threat		!Year of threat
	\|-
	~~\|9 Pollution~~
	~~\|9.2 Industrial & military effluents~~
	~~\|Medium (30-70% of population affected)~~
	~~\|Forest cover has been reduced by the spraying of chemical defoliants during the Second Indochina War (BirdLife International 2022).~~
	~~\|1955-1975~~
	\|-		\|-
	\|5 Biological resource use		\|5 Biological resource use
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	\|Illegal timber exploitation, in the past and ongoing (Vu & Doherty 2021).		\|Illegal timber exploitation, in the past and ongoing (Vu & Doherty 2021).
	\|Ongoing (2021)		\|Ongoing (2021)
			\|-
			\|9 Pollution
			\|9.2 Industrial & military effluents
			\|Medium (30-70% of population affected)
			\|Forest cover has been reduced by the spraying of chemical defoliants during the Second Indochina War (BirdLife International 2022).
			\|1955-1975
	\|}		\|}

WikiEdit: Created page with "Asia > Vietnam > Dakrong Nature Reserve '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dakrong_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/Dakrong_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/Dakrong_Nature_Reserve?_x_tr_sl=auto&_x..."

2025-10-30T17:50:54Z

Created page with "Asia > Vietnam > Dakrong Nature Reserve '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dakrong_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/Dakrong_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/Dakrong_Nature_Reserve?_x_tr_sl=auto&_x..."

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[[Asia]] > [[Vietnam]] > [[Dakrong Nature Reserve]]

'''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dakrong_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/Dakrong_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/Dakrong_Nature_Reserve?_x_tr_sl=auto&_x_tr_tl=es&_x_tr_hl=en&_x_tr_pto=wapp Español]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dakrong_Nature_Reserve?_x_tr_sl=auto&_x_tr_tl=id&_x_tr_hl=en&_x_tr_pto=wapp Bahasa Indonesia]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Dakrong_Nature_Reserve?_x_tr_sl=auto&_x_tr_tl=ms&_x_tr_hl=en&_x_tr_pto=wapp Melayu]'''

__TOC__
= Summary =

<div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|16.625414, 106.893379~[[Dakrong Nature Reserve]]~''Nomascus annamensis''}}</div>
* Northern yellow-cheeked crested gibbons (''Nomascus annamensis'') are present in Dakrong Nature Reserve.
* The population size is unknown.
* The gibbon population trend is unknown.
* The site has a total size of 376.18 km².
* Key threats to gibbons are illegal logging and exploitation of non-timber forest products.
* Conservation activities are not documented.

= Site characteristics =

Located in Quang Tri Province, in the center part of the Annamite Mountain Range, Vietnam, the Dakrong Nature Reserve was established in 2001(Vu & Doherty 2021). Approximately half the area is covered by rich and medium evergreen forest; the rest is covered by poor, regrowth forest, plantations, or bare land. The terrain of the reserve consists of low and medium hills, with the highest peak reaching 1410 m above sea level (Vu & Doherty 2021).

'''Table 1. Basic site information for Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table"
|Species
|''Nomascus annamensis''
|-
|Area
|376.18 km²
|-
|Coordinates
|Lat: 16.625414 , Lon: 106.893379
|-
|Type of site
|Protected area (Nature Reserve)
|-
|Habitat types
|Subtropical/tropical moist lowland forest, Subtropical/tropical heavily degraded former forest
|-
|Type of governance
|
|}

[[Types of sites]] [[Governance types]] [[Habitat types]]
= Ape status =

The northern yellow-cheeked crested gibbon only occurs in the Central Annamite mountain range along the borders of Vietnam and Laos, and Vietnam and Cambodia. No complete survey for the species has been conducted (Vu & Doherty 2021). A survey was conducted in the reserve in 2019 using passive acoustic monitoring. Gibbon calls were detected in 39 out of 95 recording sites (Vu & Doherty 2021). Assuming a 600 m detection distance, the model-averaged occurrence probability for the nature reserve was 0.44 (SE=0.06). The area of rich and medium evergreen forests within a km of the recording posts was the most important predictor of occurrence (positively correlated). Detection probability was estimated to be 0.52 (SE=0.04) per day (Vu & Doherty 2021).

'''Table 2. Ape population estimates reported for Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Ape_status-table"
!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 annamensis''
|2019
|
|
|
|Dakrong Nature Reserve
|Passive acoustic monitoring
|Vu & Doherty 2021
|
|
|}

[[Sampling methods]] [[Analytical frameworks]]
= Threats =

Most hunters active in the region are thought to come from other provinces, more than 100 km away from the reserve. Similar to other studies, a 2021 study showed a higher occupancy of gibbons in high vs low quality forest (Vu & Doherty 2021). Generally, northern yellow‐cheeked gibbon populations have dramatically decreased in Vietnam due to hunting, habitat loss, and the wildlife trade. The site has been selectively logged in the past, and timber and NTFP exploitation still occurs in the reserve. In addition, local communities live in villages near the nature reserve boundary (Vu & Doherty 2021).

'''Table 3. Threats to apes reported for Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Threats-table"
!Category
!Specific threats
!Threat level
!Description
!Year of threat
|-
|9 Pollution
|9.2 Industrial & military effluents
|Medium (30-70% of population affected)
|Forest cover has been reduced by the spraying of chemical defoliants during the Second Indochina War (BirdLife International 2022).
|1955-1975
|-
|5 Biological resource use
|5.1 Hunting & collecting terrestrial animals
|Present (unknown severity)
|Signs of wildlife hunting and trappings are recorded in the nature reserve (Vu & Doherty 2021).
|Ongoing (2021)
|-
|5 Biological resource use
|5.2 Gathering terrestrial plants
|Present (unknown severity)
|Illegal exploitation of non-timber forest products (Vu & Doherty 2021).
|Ongoing (2021)
|-
|5 Biological resource use
|5.3 Logging & wood harvesting
|Present (unknown severity)
|Illegal timber exploitation, in the past and ongoing (Vu & Doherty 2021).
|Ongoing (2021)
|}

[[Threats]]
= Conservation activities =

= Challenges =

'''Table 5. Challenges reported for Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Challenges-table"
!Challenges
!Specific challenges
!Source
!Year(s)
|-
|
|Not reported
|
|
|}

[[Challenges]]
= Enablers =

'''Table 6. Enablers reported for Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="enabler-table"
!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 Dakrong Nature Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="behaviours-table"
!Category
!Behavior
!Observation type
!Prevalence
!Observation dates
!Source
!Habituation
!Species
!Comment
|-
|
|Not reported
|
|
|
|
|
|
|
|}

[[Behaviours]]
= Exposure to climate change impacts =

= External links =

= References =

BirdLife International (2022) Important Bird Areas factsheet: Dakrong. Downloaded from http://www.birdlife.org on 31/01/2022.

Vu, T. T., & Doherty, P. F. (2021). Using bioacoustics to monitor gibbons. Biodiversity and Conservation, 30(4), 1189-1198. https://link.springer.com/article/10.1007/s10531-021-02139-1

'''Page created by: '''APES Atlas Team''' Date:''' 2022-01-28