Summary

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West African chimpanzees (Pan troglodytes verus) are present in Haute Dodo Classified Forest.
Population size is unknown.
The population trend is unknown.
This site has a total surface area of 1,094 km².
The forest is quite degraded, with several rubber tree plantations, and it is home to many gold miners which also infiltrate Taï Ntional Park
Conservation activities are unknown.

Site characteristics

The Haute Dodo Classified Forest has been assigned Category 3 in terms of forest degradation (the most severe level) by OIPR. It is managed by SODEFOR. It lies between the towns of Grabo, Dogbo, Doba and Djouroutou, south from the Taï National Park.

Table 1. Basic site information for Haute Dodo Classified Forest

Species	Pan troglodytes verus
Area	1,094 km²
Coordinates	Lat: 4.954447 , Lon: -7.093513
Type of site	Protected area (Classified Forest)
Habitat types	Subtropical/tropical heavily degraded former forest
Type of governance	Governance by government

Types of sites Governance types Habitat types

Ape status

Current data on the population status of chimpanzees is lacking for the site, but it has been thought that the forest still holds a significant population (Kormos et al. 2003).

Table 2. Ape population estimates reported for Haute Dodo Classified 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 verus	2002	Present				Haute Dodo Classified Forest	Unknown		Sanderson et al. 2005
Pan troglodytes verus	1988			0.4	400.0	Haute Dodo Classified Forest	Unknown		Hoppe-Dominik 1991

Sampling methods Analytical frameworks

Threats

This classified forest is much degraded, with rubber tree fields. It is home to many gold miners. It is from this forest that the majority of gold miners leave to infiltrate the Taï National Park (Soiret pers. comm. 2025).

Table 3. Threats to apes reported for Haute Dodo Classified Forest

Category	Specific threats	Threat level	Description	Year of threat
2 Agriculture & aquaculture	2.1 Annual & perennial non-timber crops	Present (unknown severity)	Rubber tree plantations present in the site (Soiret pers. comm. 2025).	Ongoing (2025)
3 Energy production & mining	3.2 Mining & quarrying	Present (unknown severity)	Gold miners inhabit the site and move to Tai National Park from this site (Soiret pers. comm. 2025).	Ongoing (2025)

Threats

Conservation activities

Table 4. Conservation activities reported for Haute Dodo Classified Forest

Category	Specific activity	Description	Implementing organization(s)	Year of activity
5 Protection & restoration	5.2 Legally protect ape habitat			Ongoing (2025)

Conservation activities

Challenges

Enablers

Research activities

Documented behaviours

Exposure to climate change impacts

As part of a study on the exposure of African great ape sites to climate change impacts, Kiribou et al. (2024) extracted climate data and data on projected extreme climate impact events for the site. Climatological characteristics were derived from observation-based climate data provided by the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP, www.isimip.org). Parameters were calculated as the average across each 30-year period. For 1981-2010, the EWEMBI dataset from ISIMIP2a was used. For the two future periods (2021-2050 and 2071-2099) ISIMIP2b climate data based on four CMIP5 global climate models were used. For future projections, two Representative Concentration Pathways (RCP) were used. RCP 2.6 is a scenario with strong mitigation measures in which global temperatures would likely rise below 2C. RCP 6.0 is a scenario with medium emissions in which global temperatures would likely rise up to 3C by 2100. For the number of days with heavy precipitation events, the 98th percentile of all precipitation days (>1mm/d) was calculated for the 1979-2013 reference period as a threshold for a heavy precipitation event. Then, for each year, the number of days above that threshold was derived. The figures on temperature and precipitation anomaly show the deviation from the mean temperature and mean precipitation for the 1979-2013 reference period.

The estimated exposure to future extreme climate impact events (crop failure, drought, river flood, wildfire, tropical cyclone, and heatwave) is based on a published dataset by Lange et al. 2020 derived from ISIMIP2b data. The same global climate models and RCPs as described above were used. Within each 30-year period, the number of years with an extreme event and the average proportion of the site affected were calculated (Kiribou et al. 2024).

Table 8. Estimated past and projected climatological characteristics in Haute Dodo Classified Forest

Value	1981-2010	2021-2050, RCP 2.6	2021-2050, RCP 6.0	2071-2099, RCP 2.6	2071-2099, RCP 6.0
Mean temperature [C]	25.5	26.5	26.3	26.6	27.6
Annual precipitation [mm]	2094	2044	2139	2078	2147
Max no. consecutive dry days (per year)	13.3	17.2	15.9	16.3	17.8
No. days with heavy precipitation (per year)	6.2	8.8	10.2	9	12.7

Table 9. Projected exposure of apes to extreme climate impact events in Haute Dodo Classified Forest

Type	No. of years with event (2021-2050, RCP 2.6)	% of site exposed (2021-2050, RCP 2.6)	No. of years with event (2021-2050, RCP 6.0)	% of site exposed (2021-2050, RCP 6.0)	No. of years with event (2070-2099, RCP 2.6)	% of site exposed (2070-2099, RCP 2.6)	No. of years with event (2070-2099, RCP 6.0)	% of site exposed (2070-2099, RCP 6.0)
Crop failure	5	1.96	5	1.45	5.5	1.83	8	1.82
Drought	0	0	0	0	0	0	0	0
Heatwave	15	87.29	16.5	88.75	18.5	89.93	17	82.11
River flood	0.75	0.03	3	2.21	3	0.96	2.5	0.68
Tropical cyclone	0	0	0.5	1.21	0	0	0	0
Wildfire	30	0.25	30	0.22	29	0.27	29	0.26

Precipitation anomaly in Haute Dodo Classified Forest
Temperature anomaly in Haute Dodo Classified Forest

External links

References

Hoppe-Dominik, B. (1991). Distribution and status of chimpanzees (Pan troglodytes verus) on the Ivory Coast. Primate Report, 31, 45–57.

Kormos, R., Boesch, C., Bakarr, M. I., & Butynski, T. (Eds.). (2003). West African chimpanzees: Status survey and conservation action plan. IUCN/SSC Primate Specialist Group. IUCN, Gland, Switzerland, and Cambridge, UK. ix + 219 pp. link

Sanderson, J., Barrie, A., Coleman, J. E., et al. (2005). A rapid survey of mammals from the Haute Dodo and Cavally Forests, Côte d’Ivoire. In L. E. Alonso, F. Lauginie, & G. Rondeau (Eds.), A rapid biological assessment of two classified forests in south-western Côte d’Ivoire (RAP Bulletin of Biological Assessment 34, pp. 118–124). Conservation International, Washington, DC.

Kiribou, R., Tehoda, P., Chukwu, O., Bempah, G., Kühl, H. S., Ferreira, J., …, & Heinicke, S. (2024). Exposure of African ape sites to climate change impacts. PLOS Climate, 3(2), e0000345. doi:10.1371/journal.pclm.0000345

Page created by: Serge Soiret Date: 2025-05-27