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[[West Africa]] > [[Ghana]] > [[Ankasa Conservation Area]]
+
[[Asia]] > [[Thailand]] > [[Bala Forest]]
 +
 
 +
'''[https://wiki-iucnapesportal-org.translate.goog/index.php/Bala_Forest?_x_tr_sl=auto&_x_tr_tl=fr&_x_tr_hl=en&_x_tr_pto=wapp Français]''' | '''[https://wiki-iucnapesportal-org.translate.goog/index.php/Bala_Forest?_x_tr_sl=auto&_x_tr_tl=pt&_x_tr_hl=en&_x_tr_pto=wapp Português]''' | '''[https://wiki-iucnapesportal-org.translate.goog/index.php/Bala_Forest?_x_tr_sl=auto&_x_tr_tl=es&_x_tr_hl=en&_x_tr_pto=wapp Español]''' | '''[https://wiki-iucnapesportal-org.translate.goog/index.php/Bala_Forest?_x_tr_sl=auto&_x_tr_tl=id&_x_tr_hl=en&_x_tr_pto=wapp Bahasa Indonesia]''' | '''[https://wiki-iucnapesportal-org.translate.goog/index.php/Bala_Forest?_x_tr_sl=auto&_x_tr_tl=ms&_x_tr_hl=en&_x_tr_pto=wapp Melayu]'''
  
 
__TOC__
 
__TOC__
 
= Summary =
 
= Summary =
  
−
<div style="float: right">{{#display_map: height=200px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|5.252710, -2.583665~[[Ankasa Conservation Area]]~Western Chimpanzee}}</div>
+
<div style="float: right">{{#display_map: height=200px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|5.787548 , 101.809392 ~[[Bala Forest]]~Symphalangus syndactylus, Hylobates agilis}}</div>
−
* Western chimpanzees (''Pan troglodytes verus'') may be present in Ankasa Conservation Area.
+
* Siamangs (''Symphalangus syndactylus'') and agile gibbons (''Hylobates agilis'') are present in Bala Forest.
−
* Chimpanzees have not been documented in the area since 2016.
+
* In 2005 it was estimated that 19 groups of siamangs and 136 groups of agile gibbons occur in the site.
−
* The chimpanzee population trend is unknown; possibly absent.
+
* The population trends are  unknown.
−
* The site has a total size of 509 km².
+
* The site has a total size of 168 km².
−
* Key threats to chimpanzees are agricultural encroachment and hunting.
+
* Key threats to apes are forest fragmentation as a result of agricultural expansion and collection of non-timber products.
−
* Conservation activities have focused on education, patrolling, and preventing further degradation from farming activities.
+
* Conservation activities are not documented.
−
 
+
* The site is part of the Hala-Bala Wildlife Sanctuary.
  
  
 
= Site characteristics =
 
= Site characteristics =
  
−
Ankasa Conservation Area (National Park and Resource Reserve) is located in the South Western part of Ghana, borderingIvory Coast. The Park is one of the few remnants of undisturbed Tropical Rainforest in Ghana. It was created in 1976. The site is very rich in biodiversity including forest elephants, bongos, leopards, olive colobus, black and white colobus, mangabey and other monkeys, yellow backed duikers and other duikers, pangolins, over 200 species of birds recorded, over 600 species of butterflies etc. The area is one of the known World Bird Areas and a Key Biodiversity Area (Ofori-Amanfo, R. pers. comm. 2023).
+
The site is located in the southernmost part of Thailand, in the San Kara Kiri mountain range, bordering Belum Forest Reserve in Malaysia (BirdLife International 2021). The site is part of the Hala-Bala Wildlife Sanctuary, which comprises two non-adjacent sectors: the Bala sector in Narathiwat province, and the Hala sector in Yala province (BirdLife International 2021). Although both siamangs and agile gibbons occur in southern Thailand, the range of siamangs is very small and confined to the Bala Forest (Nongkaew et al. 2018). The Bala Forest is found in a mountain range with an altitudinal range of 100 to 953 m above sea level (Nongkaew et al. 2018). The forest resembles the Malayan mixed dipterocarp forests more than the more seasonal, semi-evergreen forests farther north (Nongkaew et al. 2018).
  
−
'''Table 1. Basic site information for Ankasa Conservation Area'''
+
'''Table 1. Basic site information for Bala Forest'''
−
{| border="1" cellpadding="5" cellspacing="0" class="basic-information"
+
{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table"
 
|Species
 
|Species
−
|
+
|Symphalangus syndactylus, Hylobates agilis
 
|-
 
|-
 
|Area
 
|Area
−
|509 km²
+
|168 km²
 
|-
 
|-
 
|Coordinates
 
|Coordinates
−
|5.252710, -2.583665
+
|5.787548 N, 101.809392 E
 
|-
 
|-
 
|Type of site
 
|Type of site
−
|Conservation Area and Resource Reserve
+
|Wildlife Sanctuary
 
|-
 
|-
 
|Habitat types
 
|Habitat types
−
|Subtropical/Tropical Moist Lowland Forest
+
|Subtropical/tropical moist montane forest
 
|-
 
|-
 
|Type of governance
 
|Type of governance
Line 39: Line 41:
 
|}
 
|}
  
−
[https://www.iucnredlist.org/resources/habitat-classification-scheme IUCN habitat categories] [[Site designations]]
+
[https://www.iucnredlist.org/resources/habitat-classification-scheme IUCN habitat categories] [[Site designations]]  
 
= Ape status =
 
= Ape status =
  
−
Chimpanzees have not been documented in the area since 2016.
+
In a 2005 survey, siamangs occurred mostly in the southwestern part of Bala Forest, close to the Malaysian border, while agile gibbons were more evenly distributed throughout the site (Nongkaew et al. 2018).
 +
 
 +
'''Table 2. Ape population estimates reported for Bala Forest'''
 +
{| border="1" cellpadding="5" cellspacing="0" class="Ape_status-table"
 +
!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
 +
|-
 +
|''Symphalangus syndactylus''
 +
|2005
 +
|
 +
|19
 +
|0.32
 +
|Bala Forest
 +
|Fixed-point triangulation
 +
|Nongkaew et al. 2018
 +
|The density of siamangs ranged from 0 to 1.43 groups km–2 (average = 0.32, standard error (SE) = 0.08 groups km–2)
 +
|
 +
|-
 +
|''Hylobates agilis''
 +
|2005
 +
|
 +
|136
 +
|2.27
 +
|Bala Forest
 +
|Fixed-point triangulation
 +
|Nongkaew et al. 2018
 +
|Densities ranged from 1. 05 to 3.27 groups km–2. Mean density of agile gibbons in Bala Forest was 2.27 groups km–2 (SE = 0.18).
 +
|
 +
|}
 +
 
 +
= Threats =
 +
 
 +
The expansion of agricultural areas along the border with Malaysia has resulted in loss of forest connectivity between Bala Forest and the forests in Kelantan, Malaysia. Although most of the forest appears to be old-growth, much of the forest was selectively logged before 1990 (Nongkaew et al. 2018). Local people were not found hunting gibbons during a survey of the area in 1995. However, local communities do collect non-timber products such as fruits of Baccaurea spp., Dialium spp., and Garcinia atroviridis species, which are also foods for the apes (Nongkaew et al. 2018). About 9% of people collect these fruits by cutting trees, thus reducing available food sources for the gibbons. It is therefore crucial to reduce the cutting of fruit trees to allow both species to survive in this small area (Nongkaew et al. 2018).
 +
 
 +
'''Table 3. Threats to apes reported for Bala Forest'''
 +
{| border="1" cellpadding="5" cellspacing="0" class="Threats-table"
 +
!Category
 +
!Specific threats
 +
!Threat level
 +
!Description
 +
!Year of threat
 +
|-
 +
|1 Residential & commercial development
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|2 Agriculture & aquaculture
 +
|2.1 Annual & perennial non-timber crops
 +
|Unknown whether the threat category is present
 +
|Loss of forest connectivity to the forests across the border with Malaysia, due to expansion of agricultural areas along the border (Nongkaew et al. 2018).
 +
|Ongoing (2018)
 +
|-
 +
|3 Energy production & mining
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|4 Transportation & service corridors
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|5 Biological resource use
 +
|5.1 Hunting & collecting terrestrial animals
 +
|Absent
 +
|In a 2005 survey, local people were not found hunting gibbons (Nongkaew et al. 2018).
 +
|Ongoing (2018)
 +
|-
 +
|
 +
|5.2 Gathering terrestrial plants
 +
|High
 +
|People from neighbouring villages collect non-timber products, including fruits that are also food for siamang and agile gibbons (Nongkaew et al. 2018).
 +
|Ongoing (2018)
 +
|-
 +
|
 +
|5.3 Logging & wood harvesting
 +
|Low
 +
|Much of the forest was selectively logged before the 1990s (Nongkaew et al. 2018).
 +
|Ongoing (2018)
 +
|-
 +
|6 Human intrusions & disturbance
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|7 Natural system modifications
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|8 Invasive & other problematic species, genes & diseases
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|9 Pollution
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|10 Geological events
 +
|
 +
|Absent
 +
|
 +
|
 +
|-
 +
|11 Climate change & severe weather
 +
|
 +
|Unknown
 +
|
 +
|
 +
|-
 +
|12 Other threat
 +
|
 +
|Absent
 +
|
 +
|
 +
|}
 +
 
 +
[https://www.iucnredlist.org/resources/threat-classification-scheme IUCN Threats list]
 +
= Conservation activities =
 +
 
 +
 
 +
 
 +
= Challenges =
 +
 
 +
 
 +
 
 +
'''Table 5. Challenges reported for Bala Forest'''
 +
{| border="1" cellpadding="5" cellspacing="0" class="Challenges-table"
 +
!Challenges
 +
!Specific challenges
 +
!Year(s)
 +
!Source
 +
|-
 +
|
 +
|Not  reported
 +
|
 +
|
 +
|}
 +
 
 +
 +
= Enablers =
 +
 
 +
 
 +
 
 +
'''Table 6. Enablers reported for Bala Forest'''
 +
{| border="1" cellpadding="5" cellspacing="0" class="enabler-table"
 +
!Enablers
 +
!Specific enablers
 +
!Year(s)
 +
!Source
 +
|-
 +
|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 Bala Forest'''
 +
{| border="1" cellpadding="5" cellspacing="0" class="behaviours-table"
 +
!Behavior
 +
!Source
 +
|-
 +
|Not  reported
 +
|
 +
|}
 +
 
 +
 +
= Exposure to climate change impacts =
 +
 
 +
 
 +
 
 +
= External links =
 +
 
 +
 
 +
 
 +
= Relevant datasets =
 +
 
 +
 
 +
 
 +
= References =
 +
 
 +
BirdLife International (2021) Important Bird Areas factsheet: Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park. Downloaded from http://www.birdlife.org on 19/12/2021.
 +
 
 +
Nongkaew, S., Bumrungsri, S., Brockelman, W. Y., Savini, T., Pattanavibool, A., & Thong-Ari, S. (2018). PoPulation Density anD Habitat of siamang anD agile gibbon in bala forest, soutHern tHailanD. Natural History Bulletin of the Siam Society, 62(2).
 +
 
 +
 
 +
 
 +
'''Page completed by: '''A.P.E.S. Wiki team''' Date:'''29/12/2021

Latest revision as of 16:32, 22 November 2024

Asia > Thailand > Bala Forest

Français | Português | Español | Bahasa Indonesia | Melayu

Summary

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  • Siamangs (Symphalangus syndactylus) and agile gibbons (Hylobates agilis) are present in Bala Forest.
  • In 2005 it was estimated that 19 groups of siamangs and 136 groups of agile gibbons occur in the site.
  • The population trends are unknown.
  • The site has a total size of 168 km².
  • Key threats to apes are forest fragmentation as a result of agricultural expansion and collection of non-timber products.
  • Conservation activities are not documented.
  • The site is part of the Hala-Bala Wildlife Sanctuary.


Site characteristics

The site is located in the southernmost part of Thailand, in the San Kara Kiri mountain range, bordering Belum Forest Reserve in Malaysia (BirdLife International 2021). The site is part of the Hala-Bala Wildlife Sanctuary, which comprises two non-adjacent sectors: the Bala sector in Narathiwat province, and the Hala sector in Yala province (BirdLife International 2021). Although both siamangs and agile gibbons occur in southern Thailand, the range of siamangs is very small and confined to the Bala Forest (Nongkaew et al. 2018). The Bala Forest is found in a mountain range with an altitudinal range of 100 to 953 m above sea level (Nongkaew et al. 2018). The forest resembles the Malayan mixed dipterocarp forests more than the more seasonal, semi-evergreen forests farther north (Nongkaew et al. 2018).

Table 1. Basic site information for Bala Forest

Species Symphalangus syndactylus, Hylobates agilis
Area 168 km²
Coordinates 5.787548 N, 101.809392 E
Type of site Wildlife Sanctuary
Habitat types Subtropical/tropical moist montane forest
Type of governance

IUCN habitat categories Site designations

Ape status

In a 2005 survey, siamangs occurred mostly in the southwestern part of Bala Forest, close to the Malaysian border, while agile gibbons were more evenly distributed throughout the site (Nongkaew et al. 2018).

Table 2. Ape population estimates reported for Bala 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
Symphalangus syndactylus 2005 19 0.32 Bala Forest Fixed-point triangulation Nongkaew et al. 2018 The density of siamangs ranged from 0 to 1.43 groups km–2 (average = 0.32, standard error (SE) = 0.08 groups km–2)
Hylobates agilis 2005 136 2.27 Bala Forest Fixed-point triangulation Nongkaew et al. 2018 Densities ranged from 1. 05 to 3.27 groups km–2. Mean density of agile gibbons in Bala Forest was 2.27 groups km–2 (SE = 0.18).

Threats

The expansion of agricultural areas along the border with Malaysia has resulted in loss of forest connectivity between Bala Forest and the forests in Kelantan, Malaysia. Although most of the forest appears to be old-growth, much of the forest was selectively logged before 1990 (Nongkaew et al. 2018). Local people were not found hunting gibbons during a survey of the area in 1995. However, local communities do collect non-timber products such as fruits of Baccaurea spp., Dialium spp., and Garcinia atroviridis species, which are also foods for the apes (Nongkaew et al. 2018). About 9% of people collect these fruits by cutting trees, thus reducing available food sources for the gibbons. It is therefore crucial to reduce the cutting of fruit trees to allow both species to survive in this small area (Nongkaew et al. 2018).

Table 3. Threats to apes reported for Bala Forest

Category Specific threats Threat level Description Year of threat
1 Residential & commercial development Unknown
2 Agriculture & aquaculture 2.1 Annual & perennial non-timber crops Unknown whether the threat category is present Loss of forest connectivity to the forests across the border with Malaysia, due to expansion of agricultural areas along the border (Nongkaew et al. 2018). Ongoing (2018)
3 Energy production & mining Unknown
4 Transportation & service corridors Unknown
5 Biological resource use 5.1 Hunting & collecting terrestrial animals Absent In a 2005 survey, local people were not found hunting gibbons (Nongkaew et al. 2018). Ongoing (2018)
5.2 Gathering terrestrial plants High People from neighbouring villages collect non-timber products, including fruits that are also food for siamang and agile gibbons (Nongkaew et al. 2018). Ongoing (2018)
5.3 Logging & wood harvesting Low Much of the forest was selectively logged before the 1990s (Nongkaew et al. 2018). Ongoing (2018)
6 Human intrusions & disturbance Unknown
7 Natural system modifications Unknown
8 Invasive & other problematic species, genes & diseases Unknown
9 Pollution Unknown
10 Geological events Absent
11 Climate change & severe weather Unknown
12 Other threat Absent

IUCN Threats list

Conservation activities

Challenges

Table 5. Challenges reported for Bala Forest

Challenges Specific challenges Year(s) Source
Not reported


Enablers

Table 6. Enablers reported for Bala Forest

Enablers Specific enablers Year(s) Source
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 Bala Forest

Behavior Source
Not reported


Exposure to climate change impacts

External links

Relevant datasets

References

BirdLife International (2021) Important Bird Areas factsheet: Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park. Downloaded from http://www.birdlife.org on 19/12/2021.

Nongkaew, S., Bumrungsri, S., Brockelman, W. Y., Savini, T., Pattanavibool, A., & Thong-Ari, S. (2018). PoPulation Density anD Habitat of siamang anD agile gibbon in bala forest, soutHern tHailanD. Natural History Bulletin of the Siam Society, 62(2).


Page completed by: A.P.E.S. Wiki team Date:29/12/2021

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