Oni Forest Reserve

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West Africa >Nigeria > Oni Forest Reserve

Summary[edit]

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  • Nigeria-Cameroon chimpanzees (Pan troglodytes ellioti) are absent in Oni Forest Reserve
  • Chimpanzees have gone extinct at Oni Forest Reserve in the 90s.
  • The site has a total size of 56 km².
  • Key threats to chimpanzees are habitat destruction due to extensive farming.
  • Conservation activities are not documented.

Site characteristics[edit]

The site is located in the Ekiti state in Nigeria. Chimpanzees have not been observed in the reserve since 1993, and in its current condition it holds little value in terms of its natural biodiversity. Due to extensive farming, the site has in effect become unofficially de-gazetted (Greengrass 2006).

Table 1. Basic site information for Oni Forest Reserve

Area 56 km²
Coordinates 7.3513, 4.80381
Designation Forest Reserve
Habitat types Plantations, subtropical/tropical heavily degraded forest

IUCN habitat categories Site designations

Ape status[edit]

Chimpanzees have not been observed in the reserve, nor near the reserve, since 1993 (Greengrass 2003).

Table 2. Ape population estimates in Oni 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 0 Oni Forest Reserve Index survey (reconnaissance walk) Greengrass 2006

Threats[edit]

The main threats to chimpanzees and wildlife at the reserve include illegal and widespread farming in the 1990s and timber extraction that began in 1987 (Greengrass 2006).

Table 3. Threats to apes in Oni Forest 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 High Forest clearing for farmland throughout the reserve (Greengrass 2006). Ongoing (2006)
3. Energy production & mining Unknown
4. Transportation & service corridors Unknown
5. Biological resource use 5.3 Logging & wood harvesting High Timber extraction that began in 1987 (Greengrass 2006). Ongoing (2006)
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

IUCN Threats list

Conservation activities[edit]

Table 4. Conservation activities in Oni 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[edit]

Illegal clearing and farming occurred with the assistance of a corrupt police administrator who prevented the forestry department from acting against it. Violent attacks on forestry staff have also occurred on several occasions (Greengrass 2006).

Table 5. Challenges reported for Oni Forest Reserve

Challenge Source
Corruption Greengrass 2006
Violent attacks on forestry staff Greengrass 2006

Research activities[edit]

Documented behaviours[edit]

Table 6. Ape behaviors reported for Oni Forest Reserve

Behavior Source
Not reported

External links[edit]

References[edit]

Greengrass, E.J. (2006). A survey of chimpanzees in south-west Nigeria. Report to the NCF-WCS Biodiversity Research Programme.


Page completed by: A.P.E.S. Wiki team Date: 17/03/2023