Summary

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Nigeria-Cameroon chimpanzees (Pan troglodytes ellioti) are present in Mpem & Djim National Park.
The population sizes are unknown.
The population trend is unknown.
The total surface area of the park is 974.8 km².
The major threats include agricultural encroachment, pastoral pressure, poaching, and illegal logging (Mbamba Mbamba 2013).

Site characteristics

Established in 2004, Mpem & Djim National Park spans 974.8 km², with its boundaries defined by the loop created by the Mpem and Djim rivers (Fotsing et al. 2024a). The park's animal and plant diversity is diverse. The vegetation consists of open savannah, woodland savannah, and grassland savannah, along with old secondary forests, permanently inundated swamp forests, young mixed secondary forests, mosaic forest-savannah, and gallery forests (Fotsing et al. 2024a, 2024b). Various ethnic groups and followers of different faiths reside in villages surrounding the park. Regardless of ethnic or religious background, most residents rely on subsistence agriculture and livestock farming as their main sources of income; consequently, these cultural and economic differences may influence local perspectives and attitudes toward chimpanzees and their conservation in the park (Fotsing et al. 2024a).

Table 1. Basic site information for Mpem & Djim National Park

Species	Pan troglodytes ellioti
Area	974.8 km²
Coordinates	Lat: 5.17468 , Lon: 11.75192
Type of site	Protected area (National Park)
Habitat types	Subtropical/tropical moist lowland forest, Subtropical/tropical swamp forest, Savanna, Grassland, Wetlands (lakes, rivers, streams, bogs, marshes)
Type of governance	Governance by government

Types of sites Governance types Habitat types

Ape status

Table 2. Ape population estimates reported for Mpem & Djim National Park

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	2013	Present				Mpem & Djim National Park	Unknown		Mbamba Mbamba 2013

Sampling methods Analytical frameworks

Threats

The primary threats to chimpanzees in Mpem and Djim National Park include poaching and the expansion of agriculture, which leads to habitat loss. Local residents have reported a significant decline in chimpanzee sightings since 2016, a trend that aligns with observed decreases in chimpanzee abundance within the park. While poaching is considered a major factor, some community members also attribute the decline to agricultural expansion encroaching upon chimpanzee habitats. Notably, there have been no reported conflicts between humans and chimpanzees in this area (Fotsing et al. 2024a).

Table 3. Threats to apes reported for Mpem & Djim National Park

Category	Specific threats	Threat level	Description	Year of threat
2 Agriculture & aquaculture	2.1.2 Small-holder farming	High (more than 70% of population affected)	The main source of income is subsistence agriculture and livestock farming, reducing the available habitat for chimpanzees (Fotsing et al. 2024a). Large cocoa farms are expanding into the park's borders (Mbamba Mbamba 2013).	2013-Ongoing (2021)
2 Agriculture & aquaculture	2.3 Livestock farming & ranching	High (more than 70% of population affected)	Herds and bush fires set by Bororo pastoralists threaten habitats (Mbamba Mbamba 2013). Habitat encroachment due to livestock farming is present (Fotsing 2024a).	2013-Ongoing (2021)
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	High (more than 70% of population affected)	Poaching present in the site (Mbamba Mbamba 2013). During a survey around the area, a relatively high proportion of respondents (19.3% (N = 46) reported involvement in chimpanzee hunting, eating chimpanzee meat or using of body part in traditional medicine (Fotsing et al. 2024a).	2013-Ongoing (2021)
5 Biological resource use	5.3 Logging & wood harvesting	High (more than 70% of population affected)	Smuggling of rare timber continues from within the park (Mbamba Mbamba 2013).	Ongoing (2013)

Threats

Conservation activities

Table 4. Conservation activities reported for Mpem & Djim National Park

Category	Specific activity	Description	Implementing organization(s)	Year of activity
5 Protection & restoration	5.2 Legally protect ape habitat	The park was established in 2004.		2004-Ongoing (2024)
2 Counter-wildlife crime	2.3 Conduct regular anti-poaching patrols	Patrols have been conducted but details are unknown (Mbamba Mbamba 2013).		Ongoing (2012)

Conservation activities

Challenges

Table 5. Challenges reported for Mpem & Djim National Park

Challenges	Specific challenges	Source	Year(s)
2 Resources and capacity	2.2 Lack of staff	Mbamba Mbamba 2013	Ongoing (2013)
2 Resources and capacity	2.5 Lack of equipment/transportation	Mbamba Mbamba 2013	Ongoing (2013)
2 Resources and capacity	2.7 Lack of infrastructure	Mbamba Mbamba 2013	Ongoing (2013)
2 Resources and capacity	2.3 General lack of funding	Mbamba Mbamba 2013	Ongoing (2013)
5 Ecological context	5.1 Ecological constraints (e.g., susceptibility to climate change, difficult terrain)	Mbamba Mbamba 2013	Ongoing (2013)

Challenges

Enablers

Table 6. Enablers reported for Mpem & Djim National Park

Enablers	Specific enablers	Source	Year(s)
2 Resources and capacity	2.6 External partnerships that add expertise or resources	Mbamba Mbamba 2013	Ongoing (2013)
2 Resources and capacity	2.4 Adequate data to inform and evaluate conservation actions	Mbamba Mbamba 2013	Ongoing (2013)
1 Site management	1.2 Effective coordination	Mbamba Mbamba 2013	Ongoing (2013)

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. subm. 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 (see Kiribou et al. subm. for details).

Table 8. Estimated past and projected climatological characteristics in Mpem & Djim National Park

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]	24.6	25.7	25.6	25.9	27
Annual precipitation [mm]	1536	1652	1634	1663	1711
Max no. consecutive dry days (per year)	50.5	42.7	44.5	41.9	45.6
No. days with heavy precipitation (per year)	5.5	6.1	5.6	6.3	6.9

Table 9. Projected exposure of apes to extreme climate impact events in Mpem & Djim National Park

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	0.57	4.5	0.57	4.5	0.38	8	0.53
Drought	0	0	0	0	0	0	0	0
Heatwave	3	100	2.5	100	4.5	100	4.5	100
River flood	1.5	4	2.5	1.46	2	2.16	3	1.66
Tropical cyclone	0	0	0	0	0	0	0	0
Wildfire	30	0.69	30	0.7	29	0.71	29	0.7

Precipitation anomaly in Mpem & Djim National Park
Temperature anomaly in Mpem & Djim National Park

External links

References

Fotsing, E. D., Kamkeng, M. M., & Zinner, D. (2024a). Opinions, attitudes and perceptions of local people towards the conservation of Nigeria‐Cameroon chimpanzees in Mpem‐Djim National Park, central Cameroon. People and Nature, 6(2), 865-881.
Fotsing, E. D., Kamkeng, M. M., Marcel Senge, S., & Zinner, D. (2024b). Diversity, habitat and activity patterns of mesocarnivore assemblages in an Afrotropical protected forest savannah mosaic of Central Cameroon. African Journal of Ecology, 62(3), e13283.
Mbamba Mbamba, J. P. K. (2013, January). État des lieux du Parc National de Mpem et Djim [Unpublished internal report]. Centre Régional de la Délégation des Forêts et de la Faune du Centre, Ministère des Forêts et de la Faune, Cameroun.

Page created by: Steven Joel Basiibye Date: 2024-12-12

Page updated by: Aime Mizero Date: 2025-05-26