0
edits
Changes
Jump to navigation
Jump to search
Created page with "<!-- INSTRUCTIONS FOR UPLOADING SITE INFORMATION - Wiki pages contain information in paragraphs, tables, lists, and images. - Text and images are not restricted, and their for..."
<!-- INSTRUCTIONS FOR UPLOADING SITE INFORMATION
- Wiki pages contain information in paragraphs, tables, lists, and images.
- Text and images are not restricted, and their formats can be chosen as desired.
- Tables and lists are extracted as data, so the following restrictions apply to them:
1) Table structure cannot be changed.
2) List format should not change, i.e. they are comma separated lists, not bullet points or numbered lists.
3) To make information comparable across wiki pages, keywords must be taken from the list of permitted words, or added to the list of permitted keywords. This is why we use official lists, e.g., IUCN classification lists, in our tables.
-->
[[Asia]] > [[Thailand]] > [[Bala Forest]]
= Summary = <!-- An overview of the site, with one sentence for each section. May include a site map -->
* 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 = <!-- A paragraph summary of physical and geographic aspects of the site, and a table of key information -->
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'''
{| border="1" cellpadding="5" cellspacing="0" class="basic-information"
| Area <!-- Please include units: km2/ha e.g 200ha -->
|168 km²
|-
|Coordinates
|5.787548 N, 101.809392 E
|-
|Designation
|Wildlife Sanctuary
|-
|Habitat types <!-- List IUCN Habitat Classification 3.0 categories present (without number), see link below -->
|Subtropical/tropical moist montane forest
|}
[https://www.iucnredlist.org/resources/habitat-classification-scheme IUCN habitat categories] [[Site designations]]
= Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results -->
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 in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="population-estimate-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 agile''
|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 = <!-- a text overview of threats, followed by a table of key 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 in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="threats-table"
!align="left"|Category <!-- PLEASE DO NOT CHANGE THE THREAT CATEGORIES -->
!Specific threats <!-- For specific threats, please use list of comma separated keywords from the IUCN list linked below -->
!Threat level <!-- For threat level, please use keywords: low, medium, high, present, absent, unknown-->
!Quantified severity <!-- Enter any available quantification of the threat, e.g., the proportion of the area affected by the threat, hunting sign encounter rates-->
!Description <!-- Add descriptive information -->
!Year of threat <!-- Enter specific year(s), “ongoing”, or “unknown”. If the threat is ongoing, please add the year of reference in parentheses -->
|-
|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 intrusion & 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 options
|
|Absent
|
|
|
|-
|}
[https://www.iucnredlist.org/resources/threat-classification-scheme IUCN Threats list]
= Conservation activities = <!-- A summary of the conservation activities, followed by a table of key activities -->
'''Table 4. Conservation activities in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="conservation-actions-table"
!align="left"|Category <!-- PLEASE DO NOT CHANGE THE CATEGORIES -->
!Specific activity <!-- For specific threats, please use list from the list linked below, OR enter “Not reported” -->
!Description <!-- Add descriptive information -->
!Year of activity <!-- Add descriptive information -->
|-
|1. Residential & commercial development
|Not reported
|
|
|-
|2. Agriculture & aquaculture
|Not reported
|
|
|-
|3. Energy production & mining
|Not reported
|
|
|-
|4. Transportation & service corridors
|Not reported
|
|
|-
|5. Biological resource use
|Not reported
|
|
|-
|6. Human intrusion & disturbance
|Not reported
|
|
|-
|7. Natural system modifications
|Not reported
|
|
|-
|8. Invasive & other problematic species, genes, diseases
|Not reported
|
|
|-
|9. Pollution
|Not reported
|
|
|-
|10. Education & Awareness
|Not reported
|
|
|-
|11. Habitat Protection
|Not reported
|
|
|-
|12. Species Management
|Not reported
|
|
|-
|13. Livelihood; Economic & Other Incentives
|Not reported
|
|
|-
|}
[[Conservation activities list (Junker et al. 2017)]]
= Challenges = <!-- Overview of challenges in ape conservation -->
'''Table 5. Challenges reported for Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="challenges-table"
!align="left"|Challenge <!-- Do not change categories -->
!Source <!-- Source for challenge mentioned -->
|-
|Not reported
|
|-
|}
= Research activities = <!-- Overview of research activities -->
===Documented behaviours=== <!-- List of any behaviours observed at the site, including citations -->
'''Table 6. Ape behaviors reported for Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="behaviors-table"
!align="left"|Behavior
!Source
|-
|Not reported
|
|-
|}
=External links=
===Relevant datasets===
[http://apesportal.eva.mpg.de/database/archiveMap A.P.E.S Portal]
= 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. <br>
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). <br>
<br>
'''Page completed by: '''A.P.E.S. Wiki team''' Date:'''29/12/2021 <!-- If you don't want to add your name, you can add "A.P.E.S. Wiki team" -->
- Wiki pages contain information in paragraphs, tables, lists, and images.
- Text and images are not restricted, and their formats can be chosen as desired.
- Tables and lists are extracted as data, so the following restrictions apply to them:
1) Table structure cannot be changed.
2) List format should not change, i.e. they are comma separated lists, not bullet points or numbered lists.
3) To make information comparable across wiki pages, keywords must be taken from the list of permitted words, or added to the list of permitted keywords. This is why we use official lists, e.g., IUCN classification lists, in our tables.
-->
[[Asia]] > [[Thailand]] > [[Bala Forest]]
= Summary = <!-- An overview of the site, with one sentence for each section. May include a site map -->
* 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 = <!-- A paragraph summary of physical and geographic aspects of the site, and a table of key information -->
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'''
{| border="1" cellpadding="5" cellspacing="0" class="basic-information"
| Area <!-- Please include units: km2/ha e.g 200ha -->
|168 km²
|-
|Coordinates
|5.787548 N, 101.809392 E
|-
|Designation
|Wildlife Sanctuary
|-
|Habitat types <!-- List IUCN Habitat Classification 3.0 categories present (without number), see link below -->
|Subtropical/tropical moist montane forest
|}
[https://www.iucnredlist.org/resources/habitat-classification-scheme IUCN habitat categories] [[Site designations]]
= Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results -->
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 in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="population-estimate-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 agile''
|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 = <!-- a text overview of threats, followed by a table of key 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 in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="threats-table"
!align="left"|Category <!-- PLEASE DO NOT CHANGE THE THREAT CATEGORIES -->
!Specific threats <!-- For specific threats, please use list of comma separated keywords from the IUCN list linked below -->
!Threat level <!-- For threat level, please use keywords: low, medium, high, present, absent, unknown-->
!Quantified severity <!-- Enter any available quantification of the threat, e.g., the proportion of the area affected by the threat, hunting sign encounter rates-->
!Description <!-- Add descriptive information -->
!Year of threat <!-- Enter specific year(s), “ongoing”, or “unknown”. If the threat is ongoing, please add the year of reference in parentheses -->
|-
|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 intrusion & 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 options
|
|Absent
|
|
|
|-
|}
[https://www.iucnredlist.org/resources/threat-classification-scheme IUCN Threats list]
= Conservation activities = <!-- A summary of the conservation activities, followed by a table of key activities -->
'''Table 4. Conservation activities in Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="conservation-actions-table"
!align="left"|Category <!-- PLEASE DO NOT CHANGE THE CATEGORIES -->
!Specific activity <!-- For specific threats, please use list from the list linked below, OR enter “Not reported” -->
!Description <!-- Add descriptive information -->
!Year of activity <!-- Add descriptive information -->
|-
|1. Residential & commercial development
|Not reported
|
|
|-
|2. Agriculture & aquaculture
|Not reported
|
|
|-
|3. Energy production & mining
|Not reported
|
|
|-
|4. Transportation & service corridors
|Not reported
|
|
|-
|5. Biological resource use
|Not reported
|
|
|-
|6. Human intrusion & disturbance
|Not reported
|
|
|-
|7. Natural system modifications
|Not reported
|
|
|-
|8. Invasive & other problematic species, genes, diseases
|Not reported
|
|
|-
|9. Pollution
|Not reported
|
|
|-
|10. Education & Awareness
|Not reported
|
|
|-
|11. Habitat Protection
|Not reported
|
|
|-
|12. Species Management
|Not reported
|
|
|-
|13. Livelihood; Economic & Other Incentives
|Not reported
|
|
|-
|}
[[Conservation activities list (Junker et al. 2017)]]
= Challenges = <!-- Overview of challenges in ape conservation -->
'''Table 5. Challenges reported for Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="challenges-table"
!align="left"|Challenge <!-- Do not change categories -->
!Source <!-- Source for challenge mentioned -->
|-
|Not reported
|
|-
|}
= Research activities = <!-- Overview of research activities -->
===Documented behaviours=== <!-- List of any behaviours observed at the site, including citations -->
'''Table 6. Ape behaviors reported for Bala Forest'''
{| border="1" cellpadding="5" cellspacing="0" class="behaviors-table"
!align="left"|Behavior
!Source
|-
|Not reported
|
|-
|}
=External links=
===Relevant datasets===
[http://apesportal.eva.mpg.de/database/archiveMap A.P.E.S Portal]
= 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. <br>
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). <br>
<br>
'''Page completed by: '''A.P.E.S. Wiki team''' Date:'''29/12/2021 <!-- If you don't want to add your name, you can add "A.P.E.S. Wiki team" -->