Ohosu Forest Reserve - Revision history

WikiEdit at 20:30, 12 October 2026

2026-10-12T20:30:15Z

← Older revision		Revision as of 16:30, 12 October 2026
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	= Site characteristics =		= Site characteristics =

	Ohosu Forest Reserve is located in Edo State, bordering both Akure-Ofosu and Idanre Forest Reserves in Ondo State. The Lagos-Benin expressway lies close to its southern border (Greengrass 2006).		Ohosu Forest Reserve is located in Edo State, bordering both Akure-Ofosu and Idanre Forest Reserves in Ondo State. The Lagos-Benin expressway lies close to its southern border ([[#R01461\|Greengrass 2006]]).

	'''Table 1. Basic site information for Ohosu Forest Reserve'''		'''Table 1. Basic site information for Ohosu Forest Reserve'''
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	= Ape status =		= Ape status =

	Based on a 2006 survey, it is likely that chimpanzees have gone extinct in the reserve. Local people reported that large-scale logging activity in the reserve caused chimpanzees to migrate north into Ondo state. One man reported not seeing chimpanzees since the early 90s (Greengrass 2006).		Based on a 2006 survey, it is likely that chimpanzees have gone extinct in the reserve. Local people reported that large-scale logging activity in the reserve caused chimpanzees to migrate north into Ondo state. One man reported not seeing chimpanzees since the early 90s ([[#R01461\|Greengrass 2006]]).

	'''Table 2. Ape population estimates reported for Ohosu Forest Reserve'''		'''Table 2. Ape population estimates reported for Ohosu Forest Reserve'''
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	\|Reconnaissance walk		\|Reconnaissance walk
	\|		\|
	\|Greengrass 2006		\|[[#R01461\|Greengrass 2006]]
	\|		\|
	\|		\|
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	\|2.1 Annual & perennial non-timber crops		\|2.1 Annual & perennial non-timber crops
	\|High (more than 70% of population affected)		\|High (more than 70% of population affected)
	\|Illegal farming in the reserve (Greengrass 2006).		\|Illegal farming in the reserve ([[#R01461\|Greengrass 2006]]).
	\|Ongoing (2006)		\|Ongoing (2006)
	\|-		\|-
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	\|5.3 Logging & wood harvesting		\|5.3 Logging & wood harvesting
	\|High (more than 70% of population affected)		\|High (more than 70% of population affected)
	\|Timber exploitation that was reported as early as 1982 (Greengrass 2006).		\|Timber exploitation that was reported as early as 1982 ([[#R01461\|Greengrass 2006]]).
	\|Ongoing (2006)		\|Ongoing (2006)
	\|}		\|}
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	= References =		= References =

	Greengrass, E.J. (2006). A survey of chimpanzees in south-west Nigeria. Report to the NCF-WCS Biodiversity Research Programme.		<span id="R01461"></span>Greengrass, E.J. (2006). A survey of chimpanzees in south-west Nigeria. Report to the NCF-WCS Biodiversity Research Programme. [http://cameroun-foret.com/system/files/18_13_132.pdf link]



	'''Page created by: '''APES Atlas Team''' Date:''' 2023-03-13		'''Page created by: '''APES Atlas Team''' Date:''' 2023-03-13

WikiEdit at 14:47, 25 March 2026

2026-03-25T14:47:42Z

← Older revision		Revision as of 10:47, 25 March 2026
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	* Key threats to chimpanzees are habitat degradation due to logging and farming.		* Key threats to chimpanzees are habitat degradation due to logging and farming.
	* Conservation activities are not documented.		* Conservation activities are not documented.





	= Site characteristics =		= Site characteristics =

WikiEdit: Created page with "West Africa > Nigeria > Ohosu Forest Reserve '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=fr&_x_tr_hl=en&_x_tr_pto=wapp Français]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=pt&_x_tr_hl=en&_x_tr_pto=wapp Português]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_..."

2025-10-30T17:54:29Z

Created page with "West Africa > Nigeria > Ohosu Forest Reserve '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=fr&_x_tr_hl=en&_x_tr_pto=wapp Français]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=pt&_x_tr_hl=en&_x_tr_pto=wapp Português]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_..."

New page

[[West Africa]] > [[Nigeria]] > [[Ohosu Forest Reserve]]

'''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=fr&_x_tr_hl=en&_x_tr_pto=wapp Français]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=pt&_x_tr_hl=en&_x_tr_pto=wapp Português]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=es&_x_tr_hl=en&_x_tr_pto=wapp Español]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=id&_x_tr_hl=en&_x_tr_pto=wapp Bahasa Indonesia]''' | '''[https://apesatlas-iucnapesportal-org.translate.goog/index.php/Ohosu_Forest_Reserve?_x_tr_sl=auto&_x_tr_tl=ms&_x_tr_hl=en&_x_tr_pto=wapp Melayu]'''

__TOC__
= Summary =

<div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|6.807665, 5.223782~[[Ohosu Forest Reserve]]~''Pan troglodytes ellioti''}}</div>
* Nigeria-Cameroon chimpanzees (''Pan troglodytes ellioti'') are likely absent in Ohosu Forest Reserve.
* The population size is unknown.
* The chimpanzee population trend is decreasing (likely extinct).
* The site has a total size of 471 km².
* Key threats to chimpanzees are habitat degradation due to logging and farming.
* Conservation activities are not documented.

= Site characteristics =

Ohosu Forest Reserve is located in Edo State, bordering both Akure-Ofosu and Idanre Forest Reserves in Ondo State. The Lagos-Benin expressway lies close to its southern border (Greengrass 2006).

'''Table 1. Basic site information for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table"
|Species
|''Pan troglodytes ellioti''
|-
|Area
|471 km²
|-
|Coordinates
|Lat: 6.807665 , Lon: 5.223782
|-
|Type of site
|Protected area (Forest Reserve)
|-
|Habitat types
|Subtropical/tropical heavily degraded former forest, Subtropical/tropical moist lowland forest
|-
|Type of governance
|
|}

[[Types of sites]] [[Governance types]] [[Habitat types]]
= Ape status =

Based on a 2006 survey, it is likely that chimpanzees have gone extinct in the reserve. Local people reported that large-scale logging activity in the reserve caused chimpanzees to migrate north into Ondo state. One man reported not seeing chimpanzees since the early 90s (Greengrass 2006).

'''Table 2. Ape population estimates reported for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Ape_status-table"
!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 ellioti''
|2006
|
|0
|
|
|Ohosu Forest Reserve
|Reconnaissance walk
|
|Greengrass 2006
|
|
|}

[[Sampling methods]] [[Analytical frameworks]]
= Threats =

Timber exploitation was intense in this reserve, and there have also been many illegal farm settlements in the site.

'''Table 3. Threats to apes reported for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Threats-table"
!Category
!Specific threats
!Threat level
!Description
!Year of threat
|-
|2 Agriculture & aquaculture
|2.1 Annual & perennial non-timber crops
|High (more than 70% of population affected)
|Illegal farming in the reserve (Greengrass 2006).
|Ongoing (2006)
|-
|5 Biological resource use
|5.3 Logging & wood harvesting
|High (more than 70% of population affected)
|Timber exploitation that was reported as early as 1982 (Greengrass 2006).
|Ongoing (2006)
|}

[[Threats]]
= Conservation activities =

= Challenges =

'''Table 5. Challenges reported for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Challenges-table"
!Challenges
!Specific challenges
!Source
!Year(s)
|-
|
|Not reported
|
|
|}

[[Challenges]]
= Enablers =

'''Table 6. Enablers reported for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="enabler-table"
!Enablers
!Specific enablers
!Source
!Year(s)
|-
|1 Site management
|
|
|
|-
|2 Resources and capacity
|
|
|
|-
|3 Engaged community
|
|
|
|-
|4 Institutional support
|
|
|
|-
|5 Ecological context
|
|
|
|-
|6 Safety and stability
|
|
|
|}

[[Enablers]]
= Research activities =

= Documented behaviours =

'''Table 7. Behaviours documented for Ohosu Forest Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="behaviours-table"
!Category
!Behavior
!Observation type
!Prevalence
!Observation dates
!Source
!Habituation
!Species
!Comment
|-
|
|Not reported
|
|
|
|
|
|
|
|}

[[Behaviours]]
= Exposure to climate change impacts =

= External links =

= References =

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

'''Page created by: '''APES Atlas Team''' Date:''' 2023-03-13