Djoua-Ivindo forest

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Summary

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• Central chimpanzees (Pan troglodytes troglodytes) & western lowland gorillas (Gorilla gorilla gorilla) are present in Djoua-Ivindo.
• In 2015, it was estimated that 7,704 (95% CI 4,195-14,151) gorillas and 8,108 (95% CI 5,463-12,034) chimpanzees inhabit the site.
• The population trend is unknown.

Site characteristics

The Djoua Ivindo Forest is a sparsely populated region situated at the heart of the Tri-National Dja Odzala Minkebe (TRIDOM) Forest Landscape, which spans across Cameroon, Gabon, and the Republic of Congo. It is home to a significant population of forest elephants, a large number of great apes, various monkey species, rare aquatic life, and a diverse range of other wildlife (Fondation Segré).

Table 1. Basic site information for Djoua-Ivindo forest

Species	'Pan troglodytes troglodytes, Gorilla gorilla gorilla
Area	11,415 km²
Coordinates	Lat: 1.51735 , Lon: 13.55800
Type of site	Logging concession
Habitat types	Subtropical/tropical dry forest, Subtropical/tropical swamp forest
Type of governance	Private governance

IUCN habitat categories Site designations

Ape status

Table 2. Ape population estimates reported for Djoua-Ivindo forest

Species	Year	Occurrence	Encounter or vistation rate (nests/km; ind/day)	Density estimate [ind./ km²] (95% CI)	Abundance estimate (95% CI)	Survey area	Sampling method	Analytical framework	Source	Comments	A.P.E.S. database ID
Pan troglodytes troglodytes	2014-2015	Present	1.16	0.711 (0.478-1.054)	8,108 (5,463-12,034)	Djoua-Ivindo forest (11,415 km²)	Line transects	Distance sampling	Allam et al. 2016
Gorilla gorilla gorilla	2014-2015	Present	0.72	0.675 (0.368-1.240)	7,704 (4,195-14,151)	Djoua-Ivindo forest (11,415 km²)	Line transects	Distance sampling	Allam et al. 2016

Threats

Table 3. Threats to apes reported for Djoua-Ivindo forest

Category	Specific threats	Threat level	Description	Year of threat
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	Medium (30-70% of population affected)	Poaching signs (traps, cartridge cases and poachers' camps) detected during a survey in 2014-2015 (Allam et al. 2016).	Ongoing (2014)
5 Biological resource use	5.3 Logging & wood harvesting	Medium (30-70% of population affected)	Signs of logging were documented in 2014-2015 (Allam et al. 2016).	Ongoing (2014)
5 Biological resource use	5.2 Gathering terrestrial plants	Medium (30-70% of population affected)	Signs of extraction of non-timber forest products documented in 2014-2015 (Allam et al. 2016).	Ongoing (2014)
3 Energy production & mining	3.2 Mining & quarrying	Present (unknown severity)	Mining also represent significant threat to great apes and other wildlife in the region (Fondation Segré 2024).	2018-2020
1 Residential & commercial development	1.2 Commercial & industrial areas	Present (unknown severity)	Large-scale infrastructure development represents a significant threat to great apes and other wildlife in the region (Fondation Segré 2024).	2018-2020

IUCN Threats list

Conservation activities

Table 4. Conservation activities reported for Djoua-Ivindo forest

Category	Specific activity	Description	Implementing organization(s)	Year of activity
2 Counter-wildlife crime	2.3 Conduct regular anti-poaching patrols	The primary objectives are to enhance patrolling efforts and prevent poaching in this remote region, while also ensuring the arrest, prosecution, and conviction of wildlife criminals to the fullest extent of the law. The outcome will be a significant boost in anti-poaching capabilities in the Djoua Ivindo Forest, leading to better protection for threatened elephant and great ape populations, as well as other wildlife species.	Fondation Segré and WWF	2018-2020
5 Protection & restoration	5.4 Create natural habitat patches (including corridors)	The project’s goal is to preserve the ecological functions and connectivity of the TRIDOM area, ensuring the long-term conservation of its protected areas system through an integrated, sustainable, and participatory management approach in the interzone between protected areas. The project promotes a land-use matrix that will help conserve globally significant biodiversity through sustainable exploitation, while preserving it by designating land within the production forest as protected. The project aims to strengthen resource exploitation control capacities, monitor trends in biodiversity and ecosystems through an effective law enforcement system, foster collaborative management frameworks with the private sector and local communities, especially indigenous populations, and establish an efficient and cost-effective monitoring system.	Commission des forêts d'Afrique centrale	Ongoing (2023)

Conservation activities list (Junker et al. 2017)

Challenges

Table 5. Challenges reported for Djoua-Ivindo forest

Challenges	Specific challenges	Source	Year(s)
4 Institutional support	4.4 Lack of transboundary cooperation	Allam et al. 2016, COMIFAC 2023	2014-Ongoing (2023)
2 Resources and capacity	2.4 Lack of continuous/long-term funding	Allam et al. 2016, COMIFAC 2023	2014-Ongoing (2023)
3 Engaged community	3.1 General lack of community engagement or support	Allam et al. 2016, COMIFAC 2023	2014-Ongoing (2023)
2 Resources and capacity	2.6 Lack of biomonitoring/survey data	Allam et al. 2016, COMIFAC 2023	2014-Ongoing (2023)

Documented behaviours

Table 7. Behaviours documented for Djoua-Ivindo forest

Behavior	Source
Not reported

References

Allam A., N’goran K. P., Mahoungou S. & Ikoa B. (2016). Rapport d'inventaire des grands et moyens mammifères dans la forêt de Djoua-Ivindo. WWF, p57.
COMIFAC (2023). Présentation du Projet TRIDOM. Online: https://comifac.org/projet-tridom/ _ 26/11/2024.
Fondation Segré. Saving threatened elephant and great ape populations in the Djoua Ivindo Forest. Online: https://www.fondationsegre.org/saving-threatened-elephant-and-great-ape-populations-in-the-djoua-ivindo-forest/_ 26/11/2024.

Page created by: Zausa Diorne Date: 2024-11-26 08:08:00