Difference between revisions of "Dimonika Biosphere Reserve"
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+ | [[Central Africa]] > [[Republic of the Congo]] > [[Dimonika Biosphere Reserve]] | ||
− | + | = Summary = <!-- An overview of the site, with one sentence for each section. May include a site map --> | |
− | + | * Central chimpanzees (''Pan troglodytes troglodytes'') and western lowland gorillas (''Gorilla gorilla gorilla'') are present in Dimonika Biosphere Reserve. | |
− | = Summary = | + | * The gorilla population at the site has been estimated at 113 nest building individuals. |
− | + | * The great ape population trend is unknown. | |
− | * | + | * The site has a total size of 1,360 km². |
− | * | + | * Key threats to great apes are |
− | * | + | * Conservation activities at the site are not reported. |
− | * | + | * The site was declared a UNESCO Biosphere Reserve in 1988. |
− | * Key threats to apes are | ||
− | * | ||
+ | = 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 central Mayombe mountain chain in the Republic of Congo, about 50 km from the Atlantic coast. It was declared a UNESCO Biosphere Reserve in 1988 ([https://en.unesco.org/biosphere/africa/dimonika UNESCO]). The reserve has a remarkable mountainous terrain dominated by lowland guineo-congolese rainforest and savanna patches. A total of 275 bird species have been recorded at Dimonika, including rare species, such as Bubo shelleyi. In addition to western lowland gorillas and chimpanzees, other species of conservation concern found at the site include forest elephants (''Loxodonta cyclotis''), African forest buffalo (''Syncerus caffer nanus''), and mandrills (''Mandrillus sphinx'') (BirdLife International 2021). The southern edge of the reserve coincides with a road and part of a railway line that connect Brazzaville to Pointe-Noire, along which lie several large settlements. There is also a road that goes into the reserve to the villages of Dimonika and Makaba (BirdLife International 2021). | |
− | + | '''Table 1. Basic site information for Dimonika Biosphere Reserve''' | |
− | |||
− | |||
− | |||
− | |||
− | '''Table 1 | ||
{| border="1" cellpadding="5" cellspacing="0" class="basic-information" | {| border="1" cellpadding="5" cellspacing="0" class="basic-information" | ||
− | | Area | + | | Area <!-- Please include units: km2/ha e.g 200ha --> |
− | | | + | |1,360 km² |
|- | |- | ||
− | | Coordinates | + | |Coordinates |
− | | | + | | -4.167361 S, 12.346388 E |
|- | |- | ||
− | | Designation | + | |Designation |
− | | | + | |Biosphere Reserve |
|- | |- | ||
− | |Habitat types | + | |Habitat types <!-- List IUCN Habitat Classification 3.0 categories present (without number), see link below --> |
− | | | + | |Subtropical/tropical moist montane forest, savanna |
|} | |} | ||
− | [ | + | [https://www.iucnredlist.org/resources/habitat-classification-scheme IUCN habitat categories] [[Site designations]] |
− | |||
− | |||
− | |||
− | = Ape status = | + | = Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results --> |
+ | With support from the U. S. Fish & Wildlife Service's Great Ape Conservation Fund, in 2009 the Jane Goodall Institute (JGI), in partnership with the Ministère de l'Economie Forestière et de l'Environnement, was able to conduct biodiversity and socio-economic surveys in Dimonika Biosphere Reserve (Pintea, Atencia & Cox 2013). A JGI survey team conducted a series of initial reconnaissance walks within the reserve. A sampling plan was then designed using Distance software that identified 57 one-kilometer line transects. The field teams were able to collect data along 50 line transects with a total length of 44,590 km. Some inaccessible places on very steep slopes still remain quite intact with mature forest (Pintea, Atencia & Cox 2013). The survey confirmed the presence of a population of western lowland gorilla (Gorilla gorilla gorilla), estimated at 113 nest building individuals. Some ape nests could not be identified to the species level and the number of those individuals (chimpanzees or gorillas) were estimated at 163. Furthermore, gorillas were among large mammal species – including chimpanzees, duikers and bush pigs – whose traces (footprints, droppings, tracks, crossings) were the most frequently encountered (Pintea, Atencia & Cox 2013). | ||
− | + | '''Table 2. Ape population estimates in Dimonika Biosphere Reserve''' | |
− | |||
− | |||
− | |||
− | |||
− | '''Table 2 | ||
{| border="1" cellpadding="5" cellspacing="0" class="population-estimate-table" | {| border="1" cellpadding="5" cellspacing="0" class="population-estimate-table" | ||
! Species | ! Species | ||
! Year | ! Year | ||
− | ! Abundance estimate (95% | + | ! Abundance estimate (95% CI) |
− | ! Density estimate ( | + | ! Density estimate [ind./ km²] (95% CI) |
! Encounter rate (nests/km) | ! Encounter rate (nests/km) | ||
! Area | ! Area | ||
Line 72: | Line 55: | ||
! A.P.E.S. database ID | ! A.P.E.S. database ID | ||
|- | |- | ||
+ | |''Gorilla gorilla gorilla'' | ||
+ | |2009 | ||
+ | |113 | ||
| | | | ||
| | | | ||
− | | | + | |Dimonika Biosphere Reserve |
− | | | + | |Line transects (Distance) |
− | | | + | |Pintea, Atencia & Cox 2013 |
− | | | + | |113 nest building individals |
− | |||
− | |||
− | |||
| | | | ||
|} | |} | ||
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= Threats = <!-- a text overview of threats, followed by a table of key threats --> | = Threats = <!-- a text overview of threats, followed by a table of key threats --> | ||
+ | Hunting and mining are the primary threats to great apes at the site (Pintea, Atencia & Cox 2013; BirdLife International 2021). During the 2009 wildlife inventory, hunting signs (animals slaughtered, cartridge cases, hunting trails, signs of passage) and mining signs were frequently observed (Pintea, Atencia & Cox 2013). The main activity in the villages adjacent to the site is hunting, as the villages are located on major roads and constantly have customers. Old logging roads going into the reserve still serve as a network of hunting trails (Pintea, Atencia & Cox 2013). In the village of Dimonika, the hamlets of Voula and Ndéguélé (former secondary mining areas), Vigoureux, and the village of Poung, artisanal gold mining is increasing (Pintea, Atencia & Cox 2013). | ||
− | + | '''Table 3. Threats to apes in Dimonika Biosphere Reserve''' | |
− | |||
− | |||
− | '''Table 3 | ||
{| border="1" cellpadding="5" cellspacing="0" class="threats-table" | {| border="1" cellpadding="5" cellspacing="0" class="threats-table" | ||
− | !align="left"|Category | + | !align="left"|Category <!-- PLEASE DO NOT CHANGE THE THREAT CATEGORIES --> |
− | !Specific threats | + | !Specific threats <!-- For specific threats, please use list of comma separated keywords from the IUCN list linked below --> |
− | !Threat level | + | !Threat level <!-- For threat level, please use keywords: low, medium, high, present, absent, unknown--> |
− | !Quantified severity <!-- e.g., encounter | + | !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 | + | !Description <!-- Add descriptive information --> |
− | !Year of threat | + | !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 | |1. Residential & commercial development | ||
| | | | ||
− | | | + | |Unknown |
| | | | ||
| | | | ||
Line 107: | Line 88: | ||
|- | |- | ||
|2. Agriculture & aquaculture | |2. Agriculture & aquaculture | ||
+ | |2.1 Annual & perennial non-timber crops | ||
+ | |Present, but threat severity unknown | ||
| | | | ||
− | | | + | |Commercial and subsistence farming (Pintea, Atencia & Cox 2013). |
− | | | + | |Ongoing (2013) |
− | |||
− | |||
|- | |- | ||
|3. Energy production & mining | |3. Energy production & mining | ||
+ | |3.2 Mining & quarrying | ||
+ | |High | ||
| | | | ||
− | | | + | |Commercialized artisanal gold mining (Pintea, Atencia & Cox 2013). |
− | | | + | |Ongoing (2013) |
− | |||
− | |||
|- | |- | ||
|4. Transportation & service corridors | |4. Transportation & service corridors | ||
| | | | ||
− | | | + | |Unknown |
| | | | ||
| | | | ||
Line 128: | Line 109: | ||
|- | |- | ||
|5. Biological resource use | |5. Biological resource use | ||
+ | |5.1 Hunting & collecting terrestrial animals | ||
+ | |High | ||
| | | | ||
+ | |Subsistence hunting as well as commercialized bushmeat trade. Hunting tracks starting from the village follow old, established logging tracks (Pintea, Atencia & Cox 2013). | ||
+ | |Ongoing (2013) | ||
+ | |- | ||
| | | | ||
+ | |5.3 Logging & wood harvesting | ||
+ | |Low | ||
| | | | ||
− | | | + | |Old logging sites and tracks were often found during wildlife inventory (Pintea, Atencia & Cox 2013). |
− | | | + | |Ongoing (2013) |
|- | |- | ||
− | |6. Human | + | |6. Human intrusion & disturbance |
− | |||
| | | | ||
+ | |Unknown | ||
| | | | ||
| | | | ||
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|7. Natural system modifications | |7. Natural system modifications | ||
| | | | ||
− | | | + | |Unknown |
| | | | ||
| | | | ||
Line 150: | Line 138: | ||
|8. Invasive & other problematic species, genes, diseases | |8. Invasive & other problematic species, genes, diseases | ||
| | | | ||
− | | | + | |Unknown |
| | | | ||
| | | | ||
Line 157: | Line 145: | ||
|9. Pollution | |9. Pollution | ||
| | | | ||
− | | | + | |Unknown |
| | | | ||
| | | | ||
Line 164: | Line 152: | ||
|10. Geological Events | |10. Geological Events | ||
| | | | ||
− | | | + | |Absent |
| | | | ||
| | | | ||
| | | | ||
|- | |- | ||
− | |11. Climate change & severe weather | + | | 11. Climate change & severe weather |
− | |||
| | | | ||
+ | |Unknown | ||
| | | | ||
| | | | ||
Line 178: | Line 166: | ||
|12. Other options | |12. Other options | ||
| | | | ||
− | | | + | |Absent |
| | | | ||
| | | | ||
Line 186: | Line 174: | ||
[https://www.iucnredlist.org/resources/threat-classification-scheme IUCN Threats list] | [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 Dimonika Biosphere Reserve''' | |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | '''Table 4 | ||
{| border="1" cellpadding="5" cellspacing="0" class="conservation-actions-table" | {| border="1" cellpadding="5" cellspacing="0" class="conservation-actions-table" | ||
− | !align="left"|Category | + | !align="left"|Category <!-- PLEASE DO NOT CHANGE THE CATEGORIES --> |
− | !Specific activity | + | !Specific activity <!-- For specific threats, please use list from the list linked below, OR enter “Not reported” --> |
− | !Description | + | !Description <!-- Add descriptive information --> |
− | !Year of activity | + | !Year of activity <!-- Add descriptive information --> |
|- | |- | ||
|1. Residential & commercial development | |1. Residential & commercial development | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|2. Agriculture & aquaculture | |2. Agriculture & aquaculture | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|3. Energy production & mining | |3. Energy production & mining | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|4. Transportation & service corridors | |4. Transportation & service corridors | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|5. Biological resource use | |5. Biological resource use | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
− | |6. Human | + | |6. Human intrusion & disturbance |
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|7. Natural system modifications | |7. Natural system modifications | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|8. Invasive & other problematic species, genes, diseases | |8. Invasive & other problematic species, genes, diseases | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|9. Pollution | |9. Pollution | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|10. Education & Awareness | |10. Education & Awareness | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|11. Habitat Protection | |11. Habitat Protection | ||
− | | | + | |11.2. Legally protect primate habitat |
− | | | + | |The site has been a Biosphere Reserve since 1988. |
− | | | + | |Ongoing (2021) |
|- | |- | ||
|12. Species Management | |12. Species Management | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
|- | |- | ||
|13. Livelihood; Economic & Other Incentives | |13. Livelihood; Economic & Other Incentives | ||
− | | | + | |Not reported |
| | | | ||
| | | | ||
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[[Conservation activities list (Junker et al. 2017)]] | [[Conservation activities list (Junker et al. 2017)]] | ||
+ | = Challenges = <!-- Overview of challenges in ape conservation --> | ||
− | + | '''Table 5. Challenges reported for Dimonika Biosphere Reserve''' | |
− | + | {| border="1" cellpadding="5" cellspacing="0" class="challenges-table" | |
− | + | !align="left"|Challenge <!-- Do not change categories --> | |
− | + | !Source <!-- Source for challenge mentioned --> | |
− | |||
− | |||
− | |||
− | '''Table 5 | ||
− | {| border="1" cellpadding="5" cellspacing="0" class=" | ||
− | !align="left"| | ||
− | !Source | ||
|- | |- | ||
− | | | + | |Absence of management |
− | | | + | |Pintea, Atencia & Cox 2013 |
|- | |- | ||
|} | |} | ||
− | |||
− | |||
= Research activities = <!-- Overview of research activities --> | = Research activities = <!-- Overview of research activities --> | ||
− | |||
− | |||
− | |||
− | |||
===Documented behaviours=== <!-- List of any behaviours observed at the site, including citations --> | ===Documented behaviours=== <!-- List of any behaviours observed at the site, including citations --> | ||
− | '''Table 6 | + | '''Table 6. Ape behaviors reported for Dimonika Biosphere Reserve''' |
{| border="1" cellpadding="5" cellspacing="0" class="behaviors-table" | {| border="1" cellpadding="5" cellspacing="0" class="behaviors-table" | ||
− | !align="left"|Behavior | + | !align="left"|Behavior |
− | !Source | + | !Source |
|- | |- | ||
− | | | + | |Not reported |
| | | | ||
|- | |- | ||
|} | |} | ||
+ | =External links= | ||
===Relevant datasets=== | ===Relevant datasets=== | ||
[http://apesportal.eva.mpg.de/database/archiveMap A.P.E.S Portal] | [http://apesportal.eva.mpg.de/database/archiveMap A.P.E.S Portal] | ||
− | |||
− | |||
− | |||
= References = | = References = | ||
− | + | BirdLife International. (2021). Important Bird Areas factsheet: Dimonika Biosphere Reserve. Downloaded from http://www.birdlife.org on 14/10/2021.<br> | |
+ | Pintea, L., Atencia, R., & Cox, D. (2013). Gorillas in the Dimonika Biosphere Reserve. Gorilla Journal 46, 16-19. Online: https://www.berggorilla.org/en/gorillas/species/western-gorillas/articles-western-gorillas/gorillas-in-the-dimonika-biosphere-reserve/ <br> | ||
<br> | <br> | ||
− | '''Page completed by:''' | + | '''Page completed by: '''A.P.E.S. Wiki team''' Date:''' 15/10/2021 <!-- If you don't want to add your name, you can add "A.P.E.S. Wiki team" --> |
− | |||
− | |||
− |
Revision as of 12:29, 15 October 2021
Central Africa > Republic of the Congo > Dimonika Biosphere Reserve
Summary
- Central chimpanzees (Pan troglodytes troglodytes) and western lowland gorillas (Gorilla gorilla gorilla) are present in Dimonika Biosphere Reserve.
- The gorilla population at the site has been estimated at 113 nest building individuals.
- The great ape population trend is unknown.
- The site has a total size of 1,360 km².
- Key threats to great apes are
- Conservation activities at the site are not reported.
- The site was declared a UNESCO Biosphere Reserve in 1988.
Site characteristics
The site is located in the central Mayombe mountain chain in the Republic of Congo, about 50 km from the Atlantic coast. It was declared a UNESCO Biosphere Reserve in 1988 (UNESCO). The reserve has a remarkable mountainous terrain dominated by lowland guineo-congolese rainforest and savanna patches. A total of 275 bird species have been recorded at Dimonika, including rare species, such as Bubo shelleyi. In addition to western lowland gorillas and chimpanzees, other species of conservation concern found at the site include forest elephants (Loxodonta cyclotis), African forest buffalo (Syncerus caffer nanus), and mandrills (Mandrillus sphinx) (BirdLife International 2021). The southern edge of the reserve coincides with a road and part of a railway line that connect Brazzaville to Pointe-Noire, along which lie several large settlements. There is also a road that goes into the reserve to the villages of Dimonika and Makaba (BirdLife International 2021).
Table 1. Basic site information for Dimonika Biosphere Reserve
Area | 1,360 km² |
Coordinates | -4.167361 S, 12.346388 E |
Designation | Biosphere Reserve |
Habitat types | Subtropical/tropical moist montane forest, savanna |
IUCN habitat categories Site designations
Ape status
With support from the U. S. Fish & Wildlife Service's Great Ape Conservation Fund, in 2009 the Jane Goodall Institute (JGI), in partnership with the Ministère de l'Economie Forestière et de l'Environnement, was able to conduct biodiversity and socio-economic surveys in Dimonika Biosphere Reserve (Pintea, Atencia & Cox 2013). A JGI survey team conducted a series of initial reconnaissance walks within the reserve. A sampling plan was then designed using Distance software that identified 57 one-kilometer line transects. The field teams were able to collect data along 50 line transects with a total length of 44,590 km. Some inaccessible places on very steep slopes still remain quite intact with mature forest (Pintea, Atencia & Cox 2013). The survey confirmed the presence of a population of western lowland gorilla (Gorilla gorilla gorilla), estimated at 113 nest building individuals. Some ape nests could not be identified to the species level and the number of those individuals (chimpanzees or gorillas) were estimated at 163. Furthermore, gorillas were among large mammal species – including chimpanzees, duikers and bush pigs – whose traces (footprints, droppings, tracks, crossings) were the most frequently encountered (Pintea, Atencia & Cox 2013).
Table 2. Ape population estimates in Dimonika Biosphere Reserve
Species | Year | Abundance estimate (95% CI) | Density estimate [ind./ km²] (95% CI) | Encounter rate (nests/km) | Area | Method | Source | Comments | A.P.E.S. database ID |
---|---|---|---|---|---|---|---|---|---|
Gorilla gorilla gorilla | 2009 | 113 | Dimonika Biosphere Reserve | Line transects (Distance) | Pintea, Atencia & Cox 2013 | 113 nest building individals |
Threats
Hunting and mining are the primary threats to great apes at the site (Pintea, Atencia & Cox 2013; BirdLife International 2021). During the 2009 wildlife inventory, hunting signs (animals slaughtered, cartridge cases, hunting trails, signs of passage) and mining signs were frequently observed (Pintea, Atencia & Cox 2013). The main activity in the villages adjacent to the site is hunting, as the villages are located on major roads and constantly have customers. Old logging roads going into the reserve still serve as a network of hunting trails (Pintea, Atencia & Cox 2013). In the village of Dimonika, the hamlets of Voula and Ndéguélé (former secondary mining areas), Vigoureux, and the village of Poung, artisanal gold mining is increasing (Pintea, Atencia & Cox 2013).
Table 3. Threats to apes in Dimonika Biosphere Reserve
Category | Specific threats | Threat level | Quantified severity | Description | Year of threat |
---|---|---|---|---|---|
1. Residential & commercial development | Unknown | ||||
2. Agriculture & aquaculture | 2.1 Annual & perennial non-timber crops | Present, but threat severity unknown | Commercial and subsistence farming (Pintea, Atencia & Cox 2013). | Ongoing (2013) | |
3. Energy production & mining | 3.2 Mining & quarrying | High | Commercialized artisanal gold mining (Pintea, Atencia & Cox 2013). | Ongoing (2013) | |
4. Transportation & service corridors | Unknown | ||||
5. Biological resource use | 5.1 Hunting & collecting terrestrial animals | High | Subsistence hunting as well as commercialized bushmeat trade. Hunting tracks starting from the village follow old, established logging tracks (Pintea, Atencia & Cox 2013). | Ongoing (2013) | |
5.3 Logging & wood harvesting | Low | Old logging sites and tracks were often found during wildlife inventory (Pintea, Atencia & Cox 2013). | Ongoing (2013) | ||
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 |
Conservation activities
Table 4. Conservation activities in Dimonika Biosphere Reserve
Category | Specific activity | Description | Year of activity |
---|---|---|---|
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 | 11.2. Legally protect primate habitat | The site has been a Biosphere Reserve since 1988. | Ongoing (2021) |
12. Species Management | Not reported | ||
13. Livelihood; Economic & Other Incentives | Not reported |
Conservation activities list (Junker et al. 2017)
Challenges
Table 5. Challenges reported for Dimonika Biosphere Reserve
Challenge | Source |
---|---|
Absence of management | Pintea, Atencia & Cox 2013 |
Research activities
Documented behaviours
Table 6. Ape behaviors reported for Dimonika Biosphere Reserve
Behavior | Source |
---|---|
Not reported |
External links
Relevant datasets
References
BirdLife International. (2021). Important Bird Areas factsheet: Dimonika Biosphere Reserve. Downloaded from http://www.birdlife.org on 14/10/2021.
Pintea, L., Atencia, R., & Cox, D. (2013). Gorillas in the Dimonika Biosphere Reserve. Gorilla Journal 46, 16-19. Online: https://www.berggorilla.org/en/gorillas/species/western-gorillas/articles-western-gorillas/gorillas-in-the-dimonika-biosphere-reserve/
Page completed by: A.P.E.S. Wiki team Date: 15/10/2021