West Africa > Nigeria > Oluwa Forest Reserve

Summary

Nigeria-Cameroon chimpanzees (Pan troglodytes ellioti) are present in Oluwa Forest Reserve.
The population size is unknown.
The chimpanzee population trend is unknown.
The site has a total size of 678 km².
Key threats to chimpanzees are hunting, logging, and expansion of land for agriculture.
The site is part of the Omo-Shasha-Oluwa project, implemented by the Nigerian Conservation Foundation, which aims to connect three forest reserves and manage them as a wildlife sanctuary.

Site characteristics

Table 1. Basic site information for Oluwa Forest Reserve

Area	678 km²
Coordinates	6.823, 4.674
Designation	Forest Reserve
Habitat types	Subtropical/tropical low moist forest, plantations

IUCN habitat categories Site designations

Ape status

In 2006, chimpanzees and signs of chimpanzees (nests and vocalizations) were observed by the Owena river in the core area of the reserve (Greengrass 2006). Similarly, in 2012 the distribution of chimpanzees was confined to the core area of the reserve (segment OA2), encompassing approximately 39.22 km², or 5.78% of the total forest reserve (Ogunjemite & Olaniyi 2012). The population trend is unknown.

Table 2. Ape population estimates in Oluwa Forest 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
Pan troglodytes ellioti	2006			Present	Oluwa Forest Reserve	Index survey (reconnaissance walk)	Greengrass 2006	Reconnaissance walk. Nests and individuals were seen in the core area of the reserve.Vocalizations and nests also observed.
Pan troglodytes ellioti	2011-2012			Present	Oluwa Forest Reserve	Index survey (reconnaissance walk)	Ogunjemite & Olaniyi 2012	Reconnaissance walk. The study recorded 9.50 ± 1.55 individuals and 13 nests. Vocalizations and footprints were also documented.

Threats

Table 3. Threats to apes in Oluwa Forest Reserve

Category	Specific threats	Threat level	Description	Year of threat
1. Residential & commercial development		Unknown
2. Agriculture & aquaculture	2.1 Annual & perennial non-timber crops	High	Cultivation began from the outer edges of the reserve; only the core area has some natural forest left (Greengrass 2006, Ogunjemite & Olayimi 2012).	Ongoing (2012)
3. Energy production & mining		Unknown
4. Transportation & service corridors		Unknown
5. Biological resource use	5.1 Hunting & collecting terrestrial animals	High	Hunting is a major threat in the area; several gunshots were heard during a survey in 2006 (Greengrass 2006, Ogunjemite & Olayimi 2012).	Ongoing (2012)
	5.3 Logging & wood harvesting	High	Logging activity on the eastern side of the Owena River, where chimpanzees were observed (Greengrass 2006).	Ongoing (2012)
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		Unknown

IUCN Threats list

Conservation activities

Together with Omo and Shasha forest reserves, Oluwa is part of the Omo-Shasha-Oluwa project, implemented by the Nigerian Conservation Foundation, which aims to connect the three areas (PNI 2011). Although Omo and Shasha reserves are connected, Oluwa forest is isolated. The plan is to manage the Omo-Shasha-Oluwa areas as a wildlife sanctuary and permit human use where it is compatible with forest conservation. Other conservation activities included in the plan are the re-gazettement of forest reserve areas, community development, environmental education, research, eco-tourism, and long-term financing through REDD carbon credits (PNI 2011). Further information on the advancement of these activities has not been reported.

Table 4. Conservation activities in Oluwa Forest 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	Not reported
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 Oluwa Forest Reserve

Challenge	Source
Not reported

Research activities

A new nesting behavior was observed in the Oluwa Forest Reserve chimpanzee population during a survey in 2011-2012 (Ogunjemite & Olaniyi 2012). The majority of nests were built on rock platforms, perhaps due to the absence of tree species that are usually used for nesting (Ogunjemite & Olaniyi 2012).

Documented behaviours

Table 6. Ape behaviors reported for Oluwa Forest Reserve

Behavior	Source
Making ground nests	Ogunjemite & Olaniyi 2012

External links

Relevant datasets

A.P.E.S Portal

References

Greengrass, E.J. (2006). A survey of chimpanzees in south-west Nigeria. Report to the NCF-WCS Biodiversity Research Programme.
Ogunjemite, B.G. and Olaniyi, O.E. (2012), “The chimpanzees of Oluwa Forest Reserve, southwest Nigeria”, International Journal of Development and Sustainability, Vol. 1 No. 3, pp. 823-833.
Pro-Natura International. (2011), Project Progress Report for the International Elephant Foundation January 2010 – May 2011.

Page completed by: A.P.E.S. Wiki Date: 19/11/2020

Oluwa Forest Reserve

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